Class: Gauge

Gauge(client, oOptsopt)

new Gauge(client, oOptsopt)

The ExGauge/JS library provides graphics capabilities to visually display and edit the amount, level, or contents of something. The view can show one or more layers, where each layer can display one or more transparent pictures, HTML captions which can be clipped, moved, rotated or combination of them, by dragging the mouse, rolling the mouse wheel, or using the keyboard. The ExGauge/JS is a HTML standalone-component, written in JavaScript, that uses no third-party libraries.

Every option of the Gauge.Options type has associated a property of the control. For instance, the option:

cursors {string}, specifies the mouse cursor to be displayed when pointing over a part of the control
is associated with the property:
Cursors {string}, specifies the mouse cursor to be displayed when pointing over a part of the control
which means that the following statements are equivalent:
oGauge.Options = {cursors: "crosshair(dable)"}
oGauge.SetOptions({cursors: "crosshair(dable)"})
oGauge.Cursors = "crosshair(dable)"
oGauge.SetCursors("crosshair(dable)")
where oGauge is an object of Gauge type
Parameters:
Name Type Attributes Description
client any The client parameter indicates the control's client area as:
  • array of [x,y,width,height] type that specifies the control's client area
  • string, that specifies the identifier of the canvas within the document, so the canvas's client area becomes the control's client area
  • HTMLCanvasElement, that specifies the identifier of the canvas within the document, so the canvas's client area becomes the control's client area
oOpts object <optional>
 An object of Gauge.Options type that defines different options to display the control
Requires:
  • module:exontrol.commmon.min.js

Requires

  • module:exontrol.commmon.min.js

Classes

Options

Members

Listeners :exontrol.Lts

The Listeners field defines the events of the control, as an object of exontrol.Lts type. The exontrol.Lts type supports forEach(callback, thisArg) method that helps you to enumerate the events the control supports. The Events section lists the events the component supports.
Type:
  • exontrol.Lts
Example
The following sample shows how you can get all events the component currently supports:

oGauge.Listeners.forEach(function(name)
{
 console.log(name);
});

The following sample displays information about the layer being clicked:

oGauge.Listeners.Add("onclick", function (oEvent)
{
 console.log(oEvent);
});

where oGauge is an object of Gauge type

Shortcuts :exontrol.Sts

The Shortcuts field defines the shortcuts of the control, as an object of exontrol.Sts type. In order to provide keyboard support for the component, the owner <canvas> element must include the tabIndex attribute, as <canvas ... tabIndex="0">. You can associated a function or a callback to any shortcut.
Type:
  • exontrol.Sts
Example
The following sample resets the gauge's value once the user presses the Escape key:

oGauge.Shortcuts.Add( "Escape", function(oShortcut)
{
  oGauge.Value && oGauge.Smooth(function()
  {
    oGauge.Value = 0;
  })
});

where oGauge is an object of Gauge type

(static, readonly) OnDragLayerEnum :number

Specifies the operation a layer is performed once the user drags it.
Type:
  • number
Properties:
Name Type Description
exDoNothing number Nothing happens if the user drags the layer.
exDoMove number The layer is moved while dragging. The layer's OffsetX and OffsetY indicates the current (x,y) position of the layer.
exDoRotate number The layer is rotated while dragging. The RotateAngle property indicates the currently rotation angle.
exDoRotamove number The layer is moved by rotation while dragging. The RotateAngle property indicates the currently rotation angle. In this case, the layer's RotamoveOffsetX / RotamoveOffsetY property indicates the current (x,y) position of the layer.

(static, readonly) ViewableLObjEnum :number

Indicates the type of layers the control supports (visible/selectable)
Type:
  • number
Properties:
Name Type Description
exVisible number Defines a visible layer
exSelectable number Defines a selectable layer

(static) states :string

The states field defines the list of properties (separated by comma) to save or restore using the State object
Type:
  • string
Since:
  • 2.2

(static) type :string

The type field defines the full-name of the object (the constructor.name does not give the same name for minimized forms)
Type:
  • string
Since:
  • 1.8

(static) vAlpha :number

The vAlpha field specifies a value between 0 and 255 that defines pixels visible within the alpha chanel (any pixel of RGBA format with A(lpha) >= vAlpha is considered being visible)
Type:
  • number
Since:
  • 2.2

(static) version :string

The version field defines the version of the control
Type:
  • string

Methods

BeginUpdate()

The BeginUpdate() method suspends the control's render until the EndUpdate() method is called. It maintains performance, while multiple changes occurs within the control. You can use the Update() method to perform multiple changes at once.

EndUpdate()

The EndUpdate() method resumes the control's render, after it is suspended by the BeginUpdate() method.

GetCanvas() → {HTMLCanvasElement}

The GetCanvas() method gets the canvas element, the control is running on.
Returns:
Returns the HTMLCanvasElement object the control is running on.
Type
HTMLCanvasElement

GetCanvasRect() → {array}

The GetCanvasRect() method returns the canvas's client rectangle.
Returns:
Returns an array of [x,y,width,height] type that specifies the canvas's client rectangle
Type
array

GetClientRect() → {array}

The GetClientRect() method returns the control's client area.
Returns:
Returns an array of [x,y,width,height] type that specifies the control's client area
Type
array

GetCursors() → {string}

The GetCursors() method defines the mouse cursor to display when pointing over different parts of the control.
Returns:
A string expression that defines the mouse cursor to display when pointing over different parts of the control. The format of cursors property is:
"cursor(part),cursor(part),..."
where:
  • "cursor", defines the CSS mouse cursor to display while cursor hovers the part
  • "part", defines the name of the part the cursor is applied on (as defined bellow)
The cursors property supports any of the following parts:
  • "dable" (selectable and dragable layer), defines the cursor for selectable and dragable layers
  • "sable" (selectable layer), defines the cursor for selectable layers
  • "anchor" (hyperlink), defines the mouse-cursor when the mouse pointer hovers the anchor (the <a id;options> ex-HTML part marks an anchor or hyperlink element) (@since 2.2)
Type
string

GetDebug() → {boolean}

The GetDebug() method specifies whether the control shows the layers in debug mode
Returns:
Returns true, if the control shows the layers in debug mode
Type
boolean

GetFormatText() → {exontrol.DrawTextFormatEnum}

The GetFormatText() method specifies the format to display the layer's caption.
Since:
  • 1.1
Returns:
Returns a value of exontrol.DrawTextFormatEnum type, that defines the format to display the layer's caption. The exontrol.DrawTextFormatEnum type support the following flags:
  • exTextAlignTop (0x00), justifies the text to the top of the rectangle
  • exTextAlignLeft (0x00), aligns text to the left
  • exTextAlignCenter (0x01), centers text horizontally in the rectangle
  • exTextAlignRight (0x02), aligns text to the right
  • exTextAlignVCenter (0x04), centers text vertically
  • exTextAlignBottom (0x08), justifies the text to the bottom of the rectangle.
  • exTextAlignMask (0x0F), specifies the mask for text's alignment.
  • exTextWordBreak (0x10), breaks words. Lines are automatically broken between words if a word would extend past the edge of the rectangle specified by the lpRect parameter. A carriage return-line feed sequence also breaks the line. If this is not specified, output is on one line.
  • exTextSingleLine (0x20), displays text on a single line only. Carriage returns and line feeds do not break the line.
  • exTextExpandTabs (0x40), expands tab characters. The default number of characters per tab is eight.
  • exPlainText (0x80), treats the text as plain text.
  • exTextNoClip (0x0100), draws without clipping.
  • exHTMLTextNoColors (0x0200), ignores the and tags.
  • exTextCalcRect (0x0400), determines the width and height of the text.
  • exHTMLTextNoTags (0x0800), ignores all HTML tags.
  • exTextPathEllipsis (0x4000), for displayed text, replaces characters in the middle of the string with ellipses so that the result fits in the specified rectangle. If the string contains backslash (\) characters, exTextPathEllipsis preserves as much as possible of the text after the last backslash.
  • exTextEndEllipsis (0x8000), for displayed text, if the end of a string does not fit in the rectangle, it is truncated and ellipses are added. If a word that is not at the end of the string goes beyond the limits of the rectangle, it is truncated without ellipses.
  • exTextWordEllipsis (0x040000), truncates any word that does not fit in the rectangle and adds ellipses.
Type
exontrol.DrawTextFormatEnum

GetLayerAutoSize() → {number|string}

The GetLayerAutoSize() method specifies the index or the key of the layer that determines the size to display all layers.
Returns:
Returns the index or the key of the layer that determines the size to display all layers.
Type
number | string

GetLayerDragAny() → {number|string}

The GetLayerDragAny() method specifies the layer to drag (rotate, move or sweep) once the user clicks anywhere on the control.
Returns:
Returns the index or the key of the layer to drag (rotate, move or sweep) once the user clicks anywhere on the control.
Type
number | string

GetLayerOfValue() → {number|string}

The GetLayerOfValue() method specifies the index or the key of the layer whose value determines the control's Value property.
Returns:
Returns the index or the key of the layer whose value determines the control's Value property.
Type
number | string

GetLayers() → {Layers}

The GetLayers() method gets the control's layers.
Returns:
Returns the control's layers collection.
Type
Layers

GetLayersClientRect() → {array}

The GetLayersClientRect() method returns the layers's client area (control's client area).
Returns:
Returns an array of [x,y,width,height] type that specifies the layers's client area
Type
array

GetLocked() → {boolean}

The GetLocked() method specifies whether the control is locked(protected) or unlocked
Returns:
Returns true, if the control is locked(protected) or unlocked
Type
boolean

GetOptions() → {Gauge.Options}

The GetOptions() method returns the current options of the control.
Returns:
An object of Gauge.Options that indicates the options to display the control.
Type
Gauge.Options

GetReadOnly() → {boolean}

The GetReadOnly() method specifies whether the control is read-only
Since:
  • 1.8
Returns:
Returns true, if the control is read-only
Type
boolean

GetShowLayers() → {string}

The GetShowLayers() method indicates the only layers to be shown
Returns:
Returns the layers being shown within the control. Specifies the layers to display within the control as explained:
  • "all" {string}, specifies that all visible layers are shown. The Visible property (of exontrol.Gauge.Layer) shows or hides the layer
  • "" {string}, no layer is shown in the control, no matter of the layer's Visible property
  • "n1,n2,n3,..." {string}, specifies the list of layers to be shown, no matter of the layer's Visible property, where n1, n2, ... are numbers ( indicating the index of the layer to be shown ) or the layer's key. For instance "0" specifies that just the layer with the index 0 is show, "0,1,4", indicates that just layers with the specified index are displayed.
Type
string

GetSmooth() → {number}

The GetSmooth() method defines the time in ms the control goes from one layout to another.
Returns:
Returns the time in ms the control goes from one layout to another.
Type
number

GetTfi() → {string|object}

The GetTfi() method gets the font attributes to apply on captions of the control.
Returns:
Returns the font attributes as a string representation such as "b monospace 16" or as an object such as {bold: true, fontName: "monospace", fontSize: 16}.

The result as a {string} can include any of the following keywords separated by space characters:

  • bold, displays the text in bold (equivalent of <b> tag)
  • italic, displays the text in italics (equivalent of <i> tag)
  • underline, underlines the text (equivalent of <u> tag)
  • strikeout, specifies whether the text is strike-through (equivalent of <s> tag)
  • <fontName name>, specifies the font's family (equivalent of <font name> tag)
  • <fontSize size>, specifies the size of the font (equivalent of <font ;size> tag)
  • <fgColor CSSColor>, specifies the text's foreground color (equivalent of <fgcolor> tag)
  • <bgColor CSSColor>, specifies the text's background color (equivalent of <bgcolor> tag)
  • <shaColor CSSColor;width;offset>, defines the text's shadow (equivalent of <sha color;width;offset> tag)
  • <outColor CSSColor>, shows the text with outlined characters (CSScolor) (equivalent of <out color> tag)
  • <graColor CSSColor;mode;blend>, defines a gradient text (equivalent of <gra color;mode;blend> tag)

Any other word within the string result that's not recognized as a keyword is interpreted as:

  • name of the font (not a number), specifies the font's family (equivalent of <font name> tag)
  • size of the font (number), specifies the size of the font (equivalent of <font ;size> tag)

The result as {object} can include any of the following fields:

  • bold {boolean}, displays the text in bold (equivalent of <b> tag)
  • italic {boolean}, displays the text in italics (equivalent of <i> tag)
  • underline {boolean}, underlines the text (equivalent of <u> tag)
  • strikeout {boolean}, specifies whether the text is strike-through (equivalent of <s> tag)
  • fontName {string}, specifies the font's family (equivalent of <font name> tag)
  • fontSize {number}, specifies the size of the font (equivalent of <font ;size> tag)
  • fgColor {string}, specifies the text's foreground color (CSScolor) (equivalent of <fgcolor> tag)
  • bgColor {string}, specifies the text's background color (CSScolor) (equivalent of <bgcolor> tag)
  • shaColor {object}, specifies an object of {color, width, offset} type that defines the text's shadow (equivalent of <sha color;width;offset> tag), where:
    • color {string}, defines the color of the text's shadow (CSScolor)
    • width {number}, defines the size of the text's shadow
    • offset {number}, defines the offset to show the text's shadow relative to the text
  • outColor {string}, shows the text with outlined characters (CSScolor) (equivalent of <out color> tag)
  • graColor {object}, specifies an object of {color, mode, blend} type that defines a gradient text (equivalent of <gra color;mode;blend> tag), where:
    • color {string}, defines the gradient-color (CSScolor)
    • mode {number}, defines the gradient mode as a value between 0 and 4
    • blend {number}, defines the gradient blend as a value between 0 and 1

CSSColor or CSS legal color values can be specified by the following methods:

  • Hexadecimal colors, is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color. All values must be between 00 and FF. For example, #0000ff value is rendered as blue, because the blue component is set to its highest value (ff) and the others are set to 00.
  • Hexadecimal colors with transparency, is specified with: #RRGGBBAA, where AA (alpha) value must be between 00 and FF. For example, #0000ff80 defines a semi-transparent blue.
  • RGB colors, is specified with the RGB(red, green, blue) function. Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255. For example, rgb(0,0,255) defines the blue color.
  • RGBA colors, are an extension of RGB color values with an alpha channel as RGBA(red, green, blue, alpha) function, where the alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque). For example, rgba(0,0,255,0.5) defines a semi-transparent blue.
  • HSL colors, is specified with the HSL(hue, saturation, lightness) function, where hue is a degree on the color wheel (from 0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue. saturation is a percentage value; 0% means a shade of gray and 100% is the full color. lightness is also a percentage; 0% is black, 100% is white. HSL stands for hue, saturation, and lightness - and represents a cylindrical-coordinate representation of colors. For example, hsl(240, 100%, 50%) defines the blue color.
  • HSLA colors, are an extension of HSL color values with an alpha channel - which specifies the opacity of the object as HSLA(hue, saturation, lightness, alpha) function, where alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque). For example, hsla(240, 100%, 50%,0.5) defines a semi-transparent blue.
  • Predefined/Cross-browser color names, 140 color names are predefined in the HTML and CSS color specification. For example, blue defines the blue color.
Type
string | object

GetValue() → {number}

The GetValue() method specifies the control's value.
Returns:
Returns the control's value.
Type
number

GetViewRect() → {array}

The GetViewRect() method returns the position of the owner canvas element within the document.
Returns:
Returns an array of [x,y,width,height] that specifies the position canvas element within the document.
Type
array

GetVisibleRect() → {array}

The GetVisibleRect() method indicates the control's visible rectangle
Returns:
Returns an array of [x,y,width,height] type that specifies the canvas's client rectangle
Type
array

GetWheelChange() → {number}

The GetWheelChange() method defines the amount the control scrolls when the user rolls the mouse wheel.
Returns:
Returns the amount the control scrolls when the user rolls the mouse wheel.
Type
number

Layer(key) → {Layer}

The Layer() method returns a Layer object giving its index or key
Parameters:
Name Type Description
key any Specifies an integer expression that indicates the index of the layer to be requested, or any other value that indicates the key of the layer (layer's key or back).
Since:
  • 1.1
Returns:
Returns an object of Layer type associated with the giving index/key
Type
Layer

Refresh()

The Refresh() method refreshes the entire control.

SetCanvas(canvas, localCanvas)

The SetCanvas() method changes the control's canvas where it runs.
Parameters:
Name Type Description
canvas any A string that indicates the indetifier of the element within the document, or a HTMLCanvasElement reference
localCanvas boolean Specifies whether the canvas is used localy without requesting the canvas to handle the control itself.

SetClientRect(client)

The SetClientRect() method defines a client area for the control.
Parameters:
Name Type Description
client any The client parameter indicates the control's client area as:
  • array of [x,y,width,height] type that specifies the control's client area
  • string, that specifies the identifier of the canvas within the document, so the canvas's client area becomes the control's client area
  • HTMLCanvasElement, that specifies the identifier of the canvas within the document, so the canvas's client area becomes the control's client area

SetCursors(value)

The SetCursors() method changes the mouse cursor to display when pointing over different parts of the control.
Parameters:
Name Type Description
value string A string expression that defines the mouse cursor to display when pointing over different parts of the control. The format of cursors property is:
"cursor(part),cursor(part),..."
where:
  • "cursor", defines the CSS mouse cursor to display while cursor hovers the part
  • "part", defines the name of the part the cursor is applied on (as defined bellow)
The cursors property supports any of the following parts:
  • "dable" (selectable and dragable layer), defines the cursor for selectable and dragable layers
  • "sable" (selectable layer), defines the cursor for selectable layers
  • "anchor" (hyperlink), defines the mouse-cursor when the mouse pointer hovers the anchor (the <a id;options> ex-HTML part marks an anchor or hyperlink element) (@since 2.2)
Example
null {null}, no mouse cursor is provided.
  "crosshair(dable)" {string}, indicates that the "crosshair" mouse cursor is shown once the cursor hovers any "dable" (selectable and dragable) layers

SetDebug(value)

The SetDebug() method shows the control in debug-mode.
Parameters:
Name Type Description
value boolean A boolean value that indicates whether the control shows the layers in debug mode
Example
false {boolean}, shows the layers in normal-mode
  true {boolean}, shows the layers in debug-mode

SetFormatText(value)

The SetFormatText() method changes the format to display the layer's caption.
Parameters:
Name Type Description
value exontrol.DrawTextFormatEnum Specifies a value of exontrol.DrawTextFormatEnum value that defines the format to show the layer's caption. A combination of one or more exontrol.DrawTextFormatEnum flags that defines the format to show the layer's caption. The exontrol.DrawTextFormatEnum type support the following flags:
  • exTextAlignTop (0x00), justifies the text to the top of the rectangle
  • exTextAlignLeft (0x00), aligns text to the left
  • exTextAlignCenter (0x01), centers text horizontally in the rectangle
  • exTextAlignRight (0x02), aligns text to the right
  • exTextAlignVCenter (0x04), centers text vertically
  • exTextAlignBottom (0x08), justifies the text to the bottom of the rectangle.
  • exTextAlignMask (0x0F), specifies the mask for text's alignment.
  • exTextWordBreak (0x10), breaks words. Lines are automatically broken between words if a word would extend past the edge of the rectangle specified by the lpRect parameter. A carriage return-line feed sequence also breaks the line. If this is not specified, output is on one line.
  • exTextSingleLine (0x20), displays text on a single line only. Carriage returns and line feeds do not break the line.
  • exTextExpandTabs (0x40), expands tab characters. The default number of characters per tab is eight.
  • exPlainText (0x80), treats the text as plain text.
  • exTextNoClip (0x0100), draws without clipping.
  • exHTMLTextNoColors (0x0200), ignores the and tags.
  • exTextCalcRect (0x0400), determines the width and height of the text.
  • exHTMLTextNoTags (0x0800), ignores all HTML tags.
  • exTextPathEllipsis (0x4000), for displayed text, replaces characters in the middle of the string with ellipses so that the result fits in the specified rectangle. If the string contains backslash (\) characters, exTextPathEllipsis preserves as much as possible of the text after the last backslash.
  • exTextEndEllipsis (0x8000), for displayed text, if the end of a string does not fit in the rectangle, it is truncated and ellipses are added. If a word that is not at the end of the string goes beyond the limits of the rectangle, it is truncated without ellipses.
  • exTextWordEllipsis (0x040000), truncates any word that does not fit in the rectangle and adds ellipses.
Since:
  • 1.1
Example
null {null}, centers the caption
  32 or exontrol.DrawTextFormatEnum.exTextSingleLine {number}, defines a single-line caption
  0x2A or exontrol.DrawTextFormatEnum.exTextSingleLine | exontrol.DrawTextFormatEnum.exTextAlignRight | exontrol.DrawTextFormatEnum.exTextAlignBottom {number}, defines a single-line caption right/bottom-aligned

SetLayerAutoSize(value)

The SetLayerAutoSize() method resizes all layers relative to the giving layer
Parameters:
Name Type Description
value number | string Specifies the index or the key of the layer that determines the size to display all layers.
Example
-1 {number}, specifies that no layer is resized, and they are shown as provided
 0 {number}, specifies that all layers are resized and scaled based on the first-layer's picture/image (the layer with the index 0)
 "items" {string}, specifies that all layers are resized and scaled based on image/picture of the layer with the key "items"

SetLayerDragAny(value)

The SetLayerDragAny() method sets the layer to drag (rotate, move or sweep) once the user clicks anywhere on the control
Parameters:
Name Type Description
value number | string Specifies the index or the key of the layer to drag (rotate, move or sweep) once the user clicks anywhere on the control.
Example
-1 {number}, specifies that layerDragAny has no effect
 0 {number}, specifies that the layer with the index 0 is dragged, once the user clicks anywhere on the control.
 "needle" {string}, specifies that the layer with the key "needle" is dragged, once the user clicks anywhere on the control.

SetLayerOfValue(value)

The SetLayerOfValue() method changes the layer that determines the control's Value property
Parameters:
Name Type Description
value number | string Specifies the index or the key of the layer whose value determines the control's Value property.
Example
-1 {number}, indicates that the control's Value is determined by the last visible layer with [drag] (OnDrag/GetOnDrag()/SetOnDrag(value) methods of exontrol.Gauge.Layer) defined. Shortly, the last visible and dragable layer determines the control's Value.
 0 {number}, specifies that the layer with the index 0, defines the control's Value property.
 "hour" {string}, specifies that the layer with the key "hour", defines the control's Value property.

SetLayers(value) → {Layers}

The SetLayers() method defines the control's layers from a string representation (see layers within the Gauge.Options for more details).
Parameters:
Name Type Description
value string A value that indicates the string representation to get layers from The layers field defines the control's layers from a string-representation in the following format:
"back[flag=value]...[flag=value],...,back[flag=value]...[flag=value],..."
where:
  • "back", (Back/GetBack()/SetBack() methods of exontrol.Gauge.Layer) could be:
    • "" {empty string} (no layer background provided)
    • "image" {picture's name}, defines the name of a picture previously added using the exontrol.HP.Add(name,...) method. For instance, "pic" indciates that the HTML Picture named "pic" is stretched on the layer's background.
    • "color" {string}, indicates a CSS color to be displayed on the layer's background. For instance, "red", "rgba(255,0,0,1)", "#FF0000" indicates a layer full-filed with a solid red-color.
The flag can be any of the following
  • [key] {string}, specifies the layer's key (Key/GetKey()/SetKey(value) methods of Layer). The Layers.Item() method retrieves the control's layer giving its index or key. If the key is not specified, the layer's back is considered its key. For instance [key=background] indicates that the layer's key is "background", so you can always request this layer using the Layers.Item("background") method.
  • [vis] {0,1}, indicates whether the layer is visible(1) or hidden(0) (Visible/GetVisible()/SetVisible(value) methods of Layer). By default, all layers are visible(1). For instance [vis=0] specifies that the layer is hidden.
  • [pos] {number, 0-based}, specifies the layer's position as 0-based (Position/GetPosition()/SetPosition(value) methods of Layer). By default, the position of the layer on the control's background is 0. For instance [pos=1] specifies that the layer should be shown the second.
  • [sel] {0,1}, indicates whether the layer is selectable, so the user can drag it (Selectable/GetSelectable()/SetSelectable(value) methods of Layer). By default, all layers are selectable. For instance [sel=0] indicates that user can not select, drag, rotate or move by drag the layer.
  • [fore] {string}, specifies the layer's foreground as an HTML caption (can be an expression with "value" keyword which indicates the control's value) (Fore/GetFore()/SetFore(value) methods of Layer). For instance [fore=<b>caption] displays the caption in bold onto the layer's foreground, or "[fore=`` + value]" displays the control's value with a larger font.
  • [left] {string}, specifies the expression relative to the view, to determine the x-position to show the layer on the control (Left/GetLeft()/SetLeft(value) methods of Layer). The [left] flag supports the "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords. For instance [left=128] specifies 128-pixels, while [left=width/2] half of the view or x-center of the control's view.
  • [top] {string}, specifies the expression relative to the view, to determine the y-position to show the layer on the control (Top/GetTop()/SetTop(value) methods of Layer). The [top] flag supports the "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords. For instance [top=128] specifies 128-pixels, while [top=height/2] half of the view or y-center of the control's view.
  • [width] {string}, specifies the expression relative to the view, to determine the width to display the entire-layer on the control (Width/GetWidth()/SetWidth(value) methods of Layer). The [width] flag supports the "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords. For instance [width=128] specifies 128-pixels wide, while [width=width/4] quarter of the view.
  • [height] {string}, specifies the expression relative to the view, to determine the height to display the entire-layer on the control (Height/GetHeight()/SetHeight(value) methods of Layer). The [height] flag supports the "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords. For instance [height=128] specifies 128-pixels wide, while [height=height/4] quarter of the view.
  • [defX] {number}, indicates the default x-offset of the layer (DefaultOffsetX/GetDefaultOffsetX()/SetDefaultOffsetX(value) methods of Layer). For instance, [defX=-32] specifies that the layer is displayed left to 32-pixels of its default position.
  • [defY] {number}, indicates the default y-offset of the layer (DefaultOffsetY/GetDefaultOffsetY()/SetDefaultOffsetY(value) methods of Layer). For instance, [defY=-32] specifies that the layer is displayed to to 32-pixels of its default position.
  • [x] {number}, indicates the x-offset of the layer (OffsetX/GetOffsetX()/SetOffsetX(value) methods of Layer). For instance, [x=-32] specifies that the layer is displayed left to 32-pixels of its default position.
  • [y] {number}, indicates the y-offset of the layer (OffsetY/GetOffsetY()/SetOffsetY(value) methods of Layer). For instance, [y=-32] specifies that the layer is displayed to to 32-pixels of its default position.
  • [drag] {"move","rotate" or "rotamove"}, indicates the transformation ("move","rotate" or "rotamove") of the layer once the user drags it (OnDrag/GetOnDrag()/SetOnDrag(value) methods of Layer). For instance, [drag=rotate] indicates that the layer is rotated once the user drags it.
  • [value] {number}, specifies the layer's value (Value/GetValue()/SetValue(value) methods of Layer). For instance, [value=15] changes the layer's value to 15. The [v2a], [v2x] and [v2y] flags are used to converts the layer's value to rotation-angle/x-offset/y-offset.
  • [idem] {string}, ensures that the layer's offset and rotation-angle is equal for all idem layers (separated by comma character) (Idem/GetIdem()/SetIdem(value) methods of Layer). For instance, [idem=o1,o5] indicates that the current layer, o1 and o5 have the same offset and rotation-angle.
  • [xValid] {string}, validates the x-offset value of the layer using an expression that supports: "value" (specifies the x-offset/y-offset of the layer), "x" (specifies the x-offset of the layer), "y" (specifies the y-offset of the layer), "lwidth" (specifies the width in pixels of the layer's view), "lheight" (specifies the height in pixels of the layer's view), "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords (OffsetXValid/GetOffsetXValid()/SetOffsetXValid(value) methods of Layer). For instance, [xValid=(value MIN 0 MAX 48)] ensures that the layer's x-offset (OffsetX) is always between 0 and 48.
  • [yValid] {string}, validates the y-offset value of the layer using an expression that supports: "value" (specifies the x-offset/y-offset of the layer), "x" (specifies the x-offset of the layer), "y" (specifies the y-offset of the layer), "lwidth" (specifies the width in pixels of the layer's view), "lheight" (specifies the height in pixels of the layer's view), "width" (specifies the width in pixels of the control's view) and "height" (specifies the height in pixels of the control's view) keywords (OffsetYValid/GetOffsetYValid()/SetOffsetYValid(value) methods of Layer). For instance, [yValid=(value MIN -height/2 MAX height/2)] ensures that the layer's y-offset (OffsetY) is always between -height/2 and height/2.
  • [v2x] {string}, specifies the expression to convert the value to x-offset. The expression supports: "value" (specifies the layer's value) keyword (ValueToOffsetX/GetValueToOffsetX()/SetValueToOffsetX(value) methods of Layer). For instance, [v2x=(value=0) ? 0 : 48] specifies that the x-offset of the layer is 0, if the layer's value is 0 else it is 48.
  • [v2y] {string}, specifies the expression to convert the value to y-offset. The expression supports: "value" (specifies the layer's value) keyword (ValueToOffsetY/GetValueToOffsetY()/SetValueToOffsetY(value) methods of Layer). For instance, [v2y=(value=0) ? 0 : 48] specifies that the y-offset of the layer is 0, if the layer's value is 0 else it is 48.
  • [o2v] {string}, specifies the expression to convert the x-offset, y-offset to value. The expression supports: "value", "x", "offsetx" indicates the layer's x-offset property, "y", "offsety" indicates the layer's y-offset property keywords (OffsetToValue/GetOffsetToValue()/SetOffsetToValue(value) methods of Layer). For instance, [o2v=x+y/2] specifies that the layer's value is adding x-offset + y-offset divided by 2
  • [defA] {number}, specifies the default angle (degree) to rotate the layer (DefaultRotateAngle/GetDefaultRotateAngle()/SetDefaultRotateAngle(value) methods of Layer). For instance, [defA=45] specifies that the default rotation-angle for the layer is 45 degree.
  • [a] {number}, specifies the angle (degree) to rotate the layer (RotateAngle/GetRotateAngle()/SetRotateAngle(value) methods of Layer). For instance, [a=90] specifies that the layer's rotation-angle is 90 degree.
  • [aValid] {string}, validates the layer's rotation angle using an expression that supports: "value" (indicates the cumulative rotation angle) keyword (RotateAngleValid/GetRotateAngleValid()/SetRotateAngleValid(value) methods of Layer). For instance, [aValid=value < 90 ? value : (value < 180 ? 90 : ( value < 270 ? 270 : value ))] ensures that the layer's rotation-angle is between 90 and 270.
  • [xCenter] {string}, indicates the expression that determines the x-origin of the rotation point relative to the RotateCenterLayer layer. The expression supports: "lwidth" (indicates the width in pixels of the layer), "width" (specifies the width in pixels of the view / control), "lheight" (indicates the height in pixels of the layer) and "height" (specifies the height in pixels of the view / control) keywords (RotateCenterX/GetRotateCenterX()/SetRotateCenterX(value) methods of Layer). For instance, [xCenter=lwidth/2-3] defines the rotation-center 3-pixels to the left of the center of the view.
  • [yCenter] {string}, indicates the expression that determines the y-origin of the rotation point relative to the RotateCenterLayer layer. The expression supports: "lwidth" (indicates the width in pixels of the layer), "width" (specifies the width in pixels of the view / control), "lheight" (indicates the height in pixels of the layer) and "height" (specifies the height in pixels of the view / control) keywords (RotateCenterX/GetRotateCenterX()/SetRotateCenterX(value) methods of Layer). For instance, [yCenter=lheight/2+23] defines the rotation-center 23-pixels lower of the center of the view.
  • [clayer] {(number|string)}, indicates the index or key of the layer the rotation is around. If -1, the rotation is relative to the current layer. For instance, [clayer=-1] ensures that the current layer is rotated around itself.
  • [a2v] {string}, specifies the expression to convert the rotating angle to value. The expression supports: "value" (indicates the layer's rotation-angle) keyword (RotateAngleToValue/GetRotateAngleToValue()/SetRotateAngleToValue(value) methods of Layer). For instance, [a2v=round(value/360*100)] converts the layer's rotation angle to a value between 0 and 100.
  • [v2a] {string}, specifies the expression to convert the value to rotating angle. The expression supports: "value" (indicates the layer's value) keyword (ValueToRotateAngle/GetValueToRotateAngle()/SetValueToRotateAngle(value) methods of Layer). For instance, [v2a=value/100*360] converts the value between 0 and 100 to a rotation angle between 0 and 360 degree.
  • [grayscale] {any}, sets the percent value / expression to convert the layer to grayscale. The grayscale can be a number beween 0 and 100, or a string to define an expression. The expression supports: "value" (indicates the control's value) keyword (Grayscale/GetGrayscale()/SetGrayscale(value) methods of Layer). For instance, [grayscale=100] displays the layer in full-grayscale, or [grayscale=value] specifies that the layer's grayscale percent is indicated by the control's value (ex: the control's value is 25, the layer's grayscale will be 25%)
  • [transparency] {any}, sets the percent value / expression of the transparency to display the layer. The transparency can be a number beween 0 and 100, or a string to define an expression. The expression supports: "value" (indicates the control's value) keyword (Transparency/GetTransparency()/SetTransparency(value) methods of Layer). For instance, [transparency=50] displays the layer half-transparent, or [transparency=value] specifies that the layer's transparency percent is indicated by the control's value (ex: the control's value is 75, the layer is displayed 75% transparent)
  • [rotateclip] {0,1}, specifies whether the layer's clipping region is rotated once the layer is rotated (RotateClip/GetRotateClip()/SetRotateClip(value) methods of Layer). The [rotateclip] has effect only if the [clip] flag is present for the layer. For instance [rotateClip=1] specifies that the layer's clipping region is rotated once the layer itself is rotated.
  • [brightness.red] {string}, specifies the percent value / expression of the red-chanel. The expression supports: "value" (indicates the layer's value) keyword (Red/GetRed()/SetRed(value) methods of LayerColorAdjustment). For instance, [brightness.red=100] adds 100% more red, or [brightness.red=50+value/2] applies more red based on the control's value.
  • [brightness.green] {string}, specifies the percent value / expression of the green-chanel. The expression supports: "value" (indicates the layer's value) keyword (Green/GetGreen()/SetGreen(value) methods of LayerColorAdjustment). For instance, [brightness.green=100] adds 100% more green, or [brightness.green=50+value/2] applies more green based on the control's value.
  • [brightness.blue] {string}, specifies the percent value / expression of the blue-chanel. The expression supports: "value" (indicates the layer's value) keyword (Blue/GetBlue()/SetBlue(value) methods of LayerColorAdjustment). For instance, [brightness.blue=100] adds 100% more blue, or [brightness.blue=50+value/2] applies more blue based on the control's value.
  • [contrast.red] {string}, specifies the percent value / expression of the red-chanel. The expression supports: "value" (indicates the layer's value) keyword (Red/GetRed()/SetRed(value) methods of LayerColorAdjustment). For instance, [contrast.red=100] adds 100% more red, or [contrast.red=50+value/2] applies more red based on the control's value.
  • [contrast.green] {string}, specifies the percent value / expression of the green-chanel. The expression supports: "value" (indicates the layer's value) keyword (Green/GetGreen()/SetGreen(value) methods of LayerColorAdjustment). For instance, [contrast.green=100] adds 100% more green, or [contrast.green=50+value/2] applies more green based on the control's value.
  • [contrast.blue] {string}, specifies the percent value / expression of the blue-chanel. The expression supports: "value" (indicates the layer's value) keyword (Blue/GetBlue()/SetBlue(value) methods of LayerColorAdjustment). For instance, [contrast.blue=100] adds 100% more blue, or [contrast.blue=50+value/2] applies more blue based on the control's value.
  • [clip] {"Rect","RoundRect","Ellipse" or "Pie"}, specifies the type of clipping to apply on the layer (Type/GetType()/SetType(value) method of LayerClip). For instance, [clip=pie][clip.sweep=45] clips a pie of 45 degree
  • [clip.value] {number}, indicates the layer clip's value that's the value of "value" keywords within expression-properties such as: [x], [y], [left], [top], [width], [height], [roundX], [roundY], [radiusX], [radiusY], [xCenter], [yCenter], [start] and [sweep] flags of layer's clip. If the [clip.value] is not specified, the control's value is used instead. For instance, [clip.value=50] defines the value of the "value" keyword to 50 for any expression of [x], [y], [left], [top], [width], [height], [roundX], [roundY], [radiusX], [radiusY], [xCenter], [yCenter], [start] and [sweep] flags
  • [clip.x] {string}, specifies the x-offset expression / value of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (OffsetX/GetOffsetX()/SetOffsetX(value) method of LayerClip). For instance, [clip.x=120], moves right by 128-pixels the layer's clip, while [clip.x=value] indicates that the entire clip is moved horizontally based on clip/control's value.
  • [clip.y] {string}, specifies the y-offset expression / value of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (OffsetY/GetOffsetY()/SetOffsetY(value) method of LayerClip). For instance, [clip.y=-120], moves up by 128-pixels the layer's clip, while [clip.y=value] indicates that the entire clip is moved vertically based on clip/control's value.
  • [clip.left] {string}, specifies the left position / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (Left/GetLeft()/SetLeft(value) method of LayerClip). For instance, [clip.left=120], defines the left-margin of the clip at 120 pixels, or [clip.left=32+value] specifies that the clip's left margin is computed based on clip/control's value.
  • [clip.top] {string}, specifies the top position / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (Top/GetTop()/SetTop(value) method of LayerClip). For instance, [clip.top=120], defines the top-margin of the clip at 120 pixels, or [clip.top=32+value] specifies that the clip's top margin is computed based on clip/control's value.
  • [clip.width] {string}, specifies the width / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (Width/GetWidth()/SetWidth(value) method of LayerClip). For instance, [clip.width=120], defines the clip 120 pixels wide, or [clip.width=value] specifies that the clip's width is computed based on clip/control's value.
  • [clip.height] {string}, specifies the height / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (Height/GetHeight()/SetHeight(value) method of LayerClip). For instance, [clip.height=120], defines the clip 120 pixels tall, or [clip.height=value] specifies that the clip's height is computed based on clip/control's value.
  • [clip.roundX] {string}, indicates the x-radius value / expression of the round corner, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (RoundRadiusX/GetRoundRadiusX()/SetRoundRadiusX(value) method of LayerClip). For instance, [clip.roundX=16][clip.roundY=16], defines a round-radius of 16 pixels, while [clip.roundX=value][clip.roundY=value] defines the clip's round-radius based on the clip/control's value. The [clip.roundX] and [clip.roundY] flags are valid only for [clip=RoundRect].
  • [clip.roundY] {string}, indicates the y-radius value / expression of the round corner, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (RoundRadiusY/GetRoundRadiusY()/SetRoundRadiusY(value) method of LayerClip). For instance, [clip.roundX=16][clip.roundY=16], defines a round-radius of 16 pixels, while [clip.roundX=value][clip.roundY=value] defines the clip's round-radius based on the clip/control's value. The [clip.roundX] and [clip.roundY] flags are valid only for [clip=RoundRect].
  • [clip.radiusX] {string}, specifies the x-radius value / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (RadiusX/GetRadiusX()/SetRadiusX(value) method of LayerClip). For instance, [clip.radiusX=128], defines clip's x-radius to 128 pixels, while [clip.radiusX=value] specifies that the clip's x-radius is computed based on the clip/control's value. The [clip.radiusX] and [clip.radiusY] flags are valid only for [clip=Ellipse] or [clip=Pie].
  • [clip.radiusY] {string}, specifies the y-radius value / expression of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (RadiusY/GetRadiusY()/SetRadiusY(value) method of LayerClip). For instance, [clip.radiusY=128], defines clip's y-radius to 128 pixels, while [clip.radiusY=value] specifies that the clip's y-radius is computed based on the clip/control's value. The [clip.radiusX] and [clip.radiusY] flags are valid only for [clip=Ellipse] or [clip=Pie].
  • [clip.xCenter] {string}, indicates the x-position / expression of the center of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (CenterX/GetCenterX()/SetCenterX(value) method of LayerClip). For instance, [clip.xCenter=128], defines clip's x-center to 128 pixels, while [clip.xCenter=value] specifies that the clip's x-center is computed based on the clip/control's value. The [clip.xCenter] and [clip.yCenter] flags are valid only for [clip=Ellipse] or [clip=Pie].
  • [clip.yCenter] {string}, indicates the y-position / expression of the center of the clip, relative to the layer. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (CenterY/GetCenterY()/SetCenterY(value) method of LayerClip). For instance, [clip.yCenter=128], defines clip's y-center to 128 pixels, while [clip.yCenter=value] specifies that the clip's y-center is computed based on the clip/control's value. The [clip.xCenter] and [clip.yCenter] flags are valid only for [clip=Ellipse] or [clip=Pie].
  • [clip.start] {string}, indicates the pie's starting angle (degree) relative to the y-axis. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (StartAngle/GetStartAngle()/SetStartAngle(value) method of LayerClip). For instance, [clip.start=90], defines the pie's starting angle to 90 degree, or [clip.start=value] defines the pie's starting angle based on the clip/control's value. The [clip.start] and [clip.sweep] flags are valid only for [clip=Pie].
  • [clip.sweep] {string}, indicates the pie's sweep angle (degree) relative to clip's starting angle. The expression supports the following keywords: "value" (specifies the clip's value pointed by the clip/control's Value property), "width" or "lwidth" (indicates the width in pixels of the layer), "height" or "lheight" (indicates the height in pixels of the layer) (SweepAngle/GetSweepAngle()/SetSweepAngle(value) method of LayerClip). For instance, [clip.sweep=45], defines the pie's sweep angle to 45 degree, or [clip.sweep=value] defines the pie's sweep angle based on the clip/control's value. The [clip.start] and [clip.sweep] flags are valid only for [clip=Pie].
Returns:
Returns the control's layers collection
Type
Layers
Example
"gauge_back[key=back],gauge_needle[key=needle][drag=rotate]" {string}, defines a gauge control where "gauge_needle" is rotable
 "red[drag=rotate],rgba(0,255,0,0.75)[key=green][clip=ellipse][width=width/2][height=height/2][left=width/4][top=height/4][drag=move]" {string}, builds a control using two layers red and 75% green (clipped to an ellispe, which can be moved)

SetLocked(value)

The SetLocked() method locks or unlocks the control.
Parameters:
Name Type Description
value boolean A boolean value that indicates whether the control is locked(protected) or unlocked
Example
false {boolean}, unlocks the control (can select any layer)
  true {boolean}, locks the control (can't select any layer)

SetOptions(nOptions, bIncludeAll) → {boolean}

The SetOptions() method applies new options to the Gauge element
Parameters:
Name Type Description
nOptions object Specifies an object of Gauge.Options type that indicates the new options to apply
bIncludeAll boolean Indicates whether all fields of nOptions are included in the element's oOpts object
Returns:
Returns true, if there were options applied to the element
Type
boolean

SetReadOnly(value)

The SetReadOnly() method sets the control read-only.
Parameters:
Name Type Description
value boolean A boolean value that indicates whether the control is read-only
Since:
  • 1.8
Example
false {boolean}, unlocks the control (can select any layer)
  true {boolean}, locks the control (can't select any layer)

SetShowLayers(value)

The SetShowLayers() method the only layers to be shown within the control.
Parameters:
Name Type Description
value string A String expression that could be:
  • "all", specifies that all visible layers are shown. The Visible property indicates the visible layers
  • "", no layer is shown in the control, no matter of the layer's Visible property
  • "n1,n2,n3,..." specifies the list of layers to be shown, no matter of the layer's Visible property, where n1, n2, ... are numbers ( indicating the index of the layer to be shown ). For instance "0" specifies that just the layer with the index 0 is show, "0,1,4", indicates that just layers with the specified index are displayed.
Example
null {null}, specifies that all visible layers are shown (equivalent of "all")
 "" {string}, indicates than no layes is shown
 "hour,min,sec" {string}, indicates that the control shows just the "hour","min" and "sec" layers only.

SetSmooth(value)

The SetSmooth() method changes the time in ms the control goes from one layout to another (0 indicates no smooth-transition is performed).
Parameters:
Name Type Description
value number Indicates the time in ms the control goes from one layout to another.
Example
0 {number}, no smooth changes once the control goes from a layout to another
  125 {number}, specifies that a smooth-transition is performed from a layout to another for 125 ms.

SetTfi(value)

The SetTfi() method sets the font attributes to apply on captions of the control.
Parameters:
Name Type Description
value string | object Indicates a string representation such as "b monospace 16" or as an object such as {bold: true, fontName: "monospace", fontSize: 16}.

The value as {string} supports any of the following keywords (each keyword can be specified using first letters only such as "b" for "bold) separated by space characters:

  • bold, displays the text in bold (equivalent of <b> tag)
  • italic, displays the text in italics (equivalent of <i> tag)
  • underline, underlines the text (equivalent of <u> tag)
  • strikeout, specifies whether the text is strike-through (equivalent of <s> tag)
  • <fontName name>, specifies the font's family (equivalent of <font name> tag)
  • <fontSize size>, specifies the size of the font (equivalent of <font ;size> tag)
  • <fgColor CSSColor>, specifies the text's foreground color (equivalent of <fgcolor> tag)
  • <bgColor CSSColor>, specifies the text's background color (equivalent of <bgcolor> tag)
  • <shaColor CSSColor;width;offset>, defines the text's shadow (equivalent of <sha color;width;offset> tag)
  • <outColor CSSColor>, shows the text with outlined characters (CSScolor) (equivalent of <out color> tag)
  • <graColor CSSColor;mode;blend>, defines a gradient text (equivalent of <gra color;mode;blend> tag)

Any other word within the string value that's not recognized as a keyword is interpreted as:

  • name of the font (not a number), specifies the font's family (equivalent of <font name> tag)
  • size of the font (number), specifies the size of the font (equivalent of <font ;size> tag)

The value as {object} supports any of the following fields:

  • bold {boolean}, displays the text in bold (equivalent of <b> tag)
  • italic {boolean}, displays the text in italics (equivalent of <i> tag)
  • underline {boolean}, underlines the text (equivalent of <u> tag)
  • strikeout {boolean}, specifies whether the text is strike-through (equivalent of <s> tag)
  • fontName {string}, specifies the font's family (equivalent of <font name> tag)
  • fontSize {number}, specifies the size of the font (equivalent of <font ;size> tag)
  • fgColor {string}, specifies the text's foreground color (CSScolor) (equivalent of <fgcolor> tag)
  • bgColor {string}, specifies the text's background color (CSScolor) (equivalent of <bgcolor> tag)
  • shaColor {object}, specifies an object of {color, width, offset} type that defines the text's shadow (equivalent of <sha color;width;offset> tag), where:
    • color {string}, defines the color of the text's shadow (CSScolor)
    • width {number}, defines the size of the text's shadow
    • offset {number}, defines the offset to show the text's shadow relative to the text
  • outColor {string}, shows the text with outlined characters (CSScolor) (equivalent of <out color> tag)
  • graColor {object}, specifies an object of {color, mode, blend} type that defines a gradient text (equivalent of <gra color;mode;blend> tag), where:
    • color {string}, defines the gradient-color (CSScolor)
    • mode {number}, defines the gradient mode as a value between 0 and 4
    • blend {number}, defines the gradient blend as a value between 0 and 1

CSSColor or CSS legal color values can be specified by the following methods:

  • Hexadecimal colors, is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color. All values must be between 00 and FF. For example, #0000ff value is rendered as blue, because the blue component is set to its highest value (ff) and the others are set to 00.
  • Hexadecimal colors with transparency, is specified with: #RRGGBBAA, where AA (alpha) value must be between 00 and FF. For example, #0000ff80 defines a semi-transparent blue.
  • RGB colors, is specified with the RGB(red, green, blue) function. Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255. For example, rgb(0,0,255) defines the blue color.
  • RGBA colors, are an extension of RGB color values with an alpha channel as RGBA(red, green, blue, alpha) function, where the alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque). For example, rgba(0,0,255,0.5) defines a semi-transparent blue.
  • HSL colors, is specified with the HSL(hue, saturation, lightness) function, where hue is a degree on the color wheel (from 0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue. saturation is a percentage value; 0% means a shade of gray and 100% is the full color. lightness is also a percentage; 0% is black, 100% is white. HSL stands for hue, saturation, and lightness - and represents a cylindrical-coordinate representation of colors. For example, hsl(240, 100%, 50%) defines the blue color.
  • HSLA colors, are an extension of HSL color values with an alpha channel - which specifies the opacity of the object as HSLA(hue, saturation, lightness, alpha) function, where alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque). For example, hsla(240, 100%, 50%,0.5) defines a semi-transparent blue.
  • Predefined/Cross-browser color names, 140 color names are predefined in the HTML and CSS color specification. For example, blue defines the blue color.
Example
null {null}, the tfi field is ignored
  "bold monospace 16 &lt;fg blue>" {string}, defines Monospace font of 16px height, bold and blue
  {bold: true, fontName: "monospace", fontSize: 16, fgColor: "blue"} {object}, defines Monospace font of 16px height, bold and blue

SetValue(value) → {number}

The SetValue() method changes the layer that determines the control's Value property
Parameters:
Name Type Description
value number Specifies the index or the key of the layer whose value determines the control's Value property.
Returns:
Returns the control's value
Type
number
Example
0 {number}, change the control's Value to 0, so it could be a zero-offset or a zero-rotation angle, depending on how the layer interprets the value
 (new Date() - Date.Today())/1000/24/60/60 {number}, sets the control's value to current-time as a number between 0 and 1.

SetWheelChange(value)

The SetWheelChange() method changes the amount the control scrolls when the user rolls the mouse wheel.
Parameters:
Name Type Description
value number A value that specifies the amount the control scrolls when the user rolls the mouse wheel.
Example
0 {number}, locks any action the mouse's wheel performs
  5 {number}, increases the control's value by 5 once the user rotates the mouse wheel

Shuffle(ratio)

The Shuffle() method arranges randomly all layers within the control.
Parameters:
Name Type Description
ratio number specifies how far each element is randomized relative to the current size of the layout. For instance, 0 indicates that the element is not moved/shuffled, while 1, indicates that the element can randomize its position up to one width/height.

Unshuffle()

The Unshuffle() method restores the layers of the control in case they were shuffled.

Update(callback, thisArgopt)

The Update() method locks the control's paint during the callback, and invalidates the control once the method ends.
Parameters:
Name Type Attributes Description
callback callback Indicates a callback to perform changes within the control
thisArg any <optional>
 Specifies the value of "this" keyword during the callback. If missing/empty/undefined the thisArg points to the control itself, as an object of Gauge type

Events

onanchorclick

The onanchorclick() event occurs once the user clicks an anchor element (the <a id;options> ex-HTML part marks an anchor or hyperlink element)
Parameters:
Name Type Description
oEvent object Holds information about anchor being clicked
Properties
Name Type Description
id string specifies null (no identifier has been specified for the anchor) or the anchor's identifier
options string specifies null (no options has been specified for the anchor) or the anchor's options
Since:
  • 2.2
Example
The following samples display information about the element being clicked:

oGauge.Listeners.Add("onanchorclick", function (oEvent)
{
 console.log(oEvent);
})

onchange

The onchange() method occurs when the layer's value is changed.
Parameters:
Name Type Description
oEvent Layer Specifies an object of Layer type whose value/offset-x/offset-y/rotation-angle has been changed
Example
The following samples display the layer whose value is changed:

oGauge.onchange = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("onchange", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

onclick

The onclick() method occurs once the user clicks a selectable layer
Parameters:
Name Type Description
oEvent object Holds information about the click event as an object of {layer,dblClick,button,modifiers} type.
Properties
Name Type Description
layer Layer The layer field specifies null, or the layer being clicked
dblClick boolean The dblClick field indicates whether a click or double-click event occurs
button number The buttons field specifies which buttons are pressed. A number representing of the following values.
  • 1 : Primary button (usually left)
  • 2 : Secondary button (usually right)
  • 4 : Auxilary button (usually middle or mouse wheel button)
modifiers number The modifiers field specifies the modifier keys for the current event. A number that indicates a combination of 1, 2, 4 and 16 according with modifier keys (ALT, CTRL, META and SHIFT), or 0 if no modifier keys.
Example
The following samples display information once the user clicks a layer:

oGauge.onclick = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("onclick", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

ondrag

The ondrag() method occurs once the layer has been dragged to a new position.
Parameters:
Name Type Description
oEvent object Holds information about the layer being dragged, as an object of {layer,event} type
Properties
Name Type Description
layer Layer Indicates an object of Layer type that specifies the layer being dragged
event MouseEvent | TouchEvent defines the event that generated the current operation
Example
The following samples display information while draging (move, rotate or swipe) the layer:

oGauge.ondrag = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("ondrag", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

ondragend

The ondragend() method notifies that dragging the layer ends
Parameters:
Name Type Description
oEvent object Holds information about the layer being dragged, as an object of {layer,event} type
Properties
Name Type Description
layer Layer Indicates an object of Layer type that specifies the layer being dragged
event MouseEvent | TouchEvent defines the event that generated the current operation
Example
The following samples display information while the user ends draging (move, rotate or swipe) a layer:

oGauge.ondragend = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("ondragend", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

ondragstart

The onDragStart() method notifies that the user starts draggging the layer
Parameters:
Name Type Description
oEvent object Holds information about the layer to drag, as an object of {layer,cancel,event} type
Properties
Name Type Description
layer Layer Indicates an object of Layer type that specifies the layer being dragged
cancel boolean Specifies whether the drag operation should cancel
event MouseEvent | TouchEvent defines the event that generated the current operation
Example
The following samples display information once the user starts draging (move, rotate or swipe) a layer:

oGauge.ondragstart = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("ondragstart", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

onlayerin

The onlayerin() method notifies that the cursor enters the layer
Parameters:
Name Type Description
oEvent Layer Indicates an object of Layer that specifies the layer
Example
The following samples display the layer the cursor enters in:

oGauge.onlayerin = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("onlayerin", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type

onlayerout

The onlayerout() method notifies that the cursor exits the layer.
Parameters:
Name Type Description
oEvent Layer Indicates an object of Layer that specifies the layer
Example
The following samples display the layer once the cursor leaves it:

oGauge.onlayerout = function (oEvent)
{
 console.log(oEvent);
}

or

oGauge.Listeners.Add("onlayerout", function (oEvent)
{
 console.log(oEvent);
})

where oGauge is an object of Gauge type