119 lines
4.3 KiB
JavaScript
119 lines
4.3 KiB
JavaScript
/* -*- mode: js2; js2-basic-offset: 4; -*- */
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const Clutter = imports.gi.Clutter;
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const Tweener = imports.tweener.tweener;
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const DEFAULT_BUTTON_COLOR = new Clutter.Color();
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DEFAULT_BUTTON_COLOR.from_pixel(0xeeddccff);
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const DEFAULT_PRESSED_BUTTON_COLOR = new Clutter.Color();
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DEFAULT_PRESSED_BUTTON_COLOR.from_pixel(0xccbbaaff);
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// Time for animation making the button darker
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const ANIMATION_TIME = 0.3;
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const NO_OPACITY = 0;
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const PARTIAL_OPACITY = 0.4 * 255;
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const FULL_OPACITY = 255;
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function Button(text, buttonColor, pressedButtonColor, staysPressed, minWidth, minHeight) {
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this._init(text, buttonColor, pressedButtonColor, staysPressed, minWidth, minHeight);
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}
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Button.prototype = {
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_init : function(text, buttonColor, pressedButtonColor, staysPressed, minWidth, minHeight) {
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this._buttonColor = buttonColor
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if (buttonColor == null)
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this._buttonColor = DEFAULT_BUTTON_COLOR;
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this._pressedButtonColor = pressedButtonColor
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if (pressedButtonColor == null)
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this._pressedButtonColor = DEFAULT_PRESSED_BUTTON_COLOR;
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if (staysPressed == null)
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staysPressed = false
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if (minWidth == null)
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minWidth = 0;
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if (minHeight == null)
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minHeight = 0;
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// if staysPressed is true, this.active will be true past the first release of a button, untill a subsequent one (the button
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// is unpressed) or untill release() is called explicitly
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this._active = false;
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this._isBetweenPressAndRelease = false;
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this._mouseIsOverButton = false;
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this.button = new Clutter.Group({reactive: true});
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this._background = new Clutter.Rectangle({ color: this._buttonColor});
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this._pressedBackground = new Clutter.Rectangle({ color: this._pressedButtonColor, opacity: NO_OPACITY});
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this._label = new Clutter.Label({ font_name: "Sans Bold 16px",
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text: text});
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this._label.set_position(5, 5);
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let backgroundWidth = Math.max(this._label.get_width()+10, minWidth);
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let backgroundHeight = Math.max(this._label.get_height()+10, minHeight);
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this._background.set_width(backgroundWidth)
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this._background.set_height(backgroundHeight)
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this._pressedBackground.set_width(backgroundWidth)
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this._pressedBackground.set_height(backgroundHeight)
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this.button.add_actor(this._background);
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this.button.add_actor(this._pressedBackground);
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this.button.add_actor(this._label);
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let me = this;
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this.button.connect('button-press-event',
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function(o, event) {
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me._isBetweenPressAndRelease = true;
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Tweener.addTween(me._pressedBackground,
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{ time: ANIMATION_TIME,
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opacity: FULL_OPACITY,
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transition: "linear"
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});
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return false;
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});
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this.button.connect('button-release-event',
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function(o, event) {
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me._isBetweenPressAndRelease = false;
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if (!staysPressed || me._active) {
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me.release();
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} else {
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me._active = true;
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}
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return false;
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});
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this.button.connect('enter-event',
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function(o, event) {
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me._mouseIsOverButton = true;
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if (!me._active) {
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Tweener.removeTweens(me._pressedBackground);
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me._pressedBackground.set_opacity(PARTIAL_OPACITY);
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}
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return false;
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});
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this.button.connect('leave-event',
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function(o, event) {
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me._isBetweenPressAndRelease = false;
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me._mouseIsOverButton = false;
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if (!me._active) {
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Tweener.removeTweens(me._pressedBackground);
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me._pressedBackground.set_opacity(NO_OPACITY);
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}
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return false;
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});
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},
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release : function() {
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if (!this._isBetweenPressAndRelease) {
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this._active = false;
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Tweener.removeTweens(this._pressedBackground);
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if (this._mouseIsOverButton) {
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this._pressedBackground.set_opacity(PARTIAL_OPACITY);
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} else {
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this._pressedBackground.set_opacity(NO_OPACITY);
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}
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}
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}
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}
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