360 lines
13 KiB
JavaScript
360 lines
13 KiB
JavaScript
/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
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const Clutter = imports.gi.Clutter;
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const Lang = imports.lang;
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const St = imports.gi.St;
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const Shell = imports.gi.Shell;
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const Tweener = imports.ui.tweener;
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const POPUP_ANIMATION_TIME = 0.15;
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/**
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* BoxPointer:
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* @side: A St.Side type; currently only St.Side.TOP is implemented
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* @binProperties: Properties to set on contained bin
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*
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* An actor which displays a triangle "arrow" pointing to a given
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* side. The .bin property is a container in which content can be
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* placed. The arrow position may be controlled via setArrowOrigin().
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*
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*/
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function BoxPointer(side, binProperties) {
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this._init(side, binProperties);
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}
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BoxPointer.prototype = {
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_init: function(arrowSide, binProperties) {
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this._arrowSide = arrowSide;
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this._arrowOrigin = 0;
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this.actor = new St.Bin({ x_fill: true,
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y_fill: true });
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this._container = new Shell.GenericContainer();
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this.actor.set_child(this._container);
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this._container.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
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this._container.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
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this._container.connect('allocate', Lang.bind(this, this._allocate));
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this.bin = new St.Bin(binProperties);
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this._container.add_actor(this.bin);
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this._border = new St.DrawingArea();
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this._border.connect('repaint', Lang.bind(this, this._drawBorder));
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this._container.add_actor(this._border);
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this.bin.raise(this._border);
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},
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animateAppear: function(onComplete) {
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let x = this.actor.x;
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let y = this.actor.y;
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let themeNode = this.actor.get_theme_node();
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let rise = themeNode.get_length('-arrow-rise');
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this.actor.opacity = 0;
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this.actor.show();
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switch (this._arrowSide) {
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case St.Side.TOP:
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this.actor.y -= rise;
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break;
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case St.Side.BOTTOM:
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this.actor.y += rise;
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break;
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case St.Side.LEFT:
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this.actor.x -= rise;
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break;
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case St.Side.RIGHT:
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this.actor.x += rise;
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break;
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}
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Tweener.addTween(this.actor, { opacity: 255,
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x: x,
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y: y,
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transition: "linear",
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onComplete: onComplete,
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time: POPUP_ANIMATION_TIME });
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},
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animateDisappear: function(onComplete) {
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let x = this.actor.x;
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let y = this.actor.y;
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let originalX = this.actor.x;
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let originalY = this.actor.y;
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let themeNode = this.actor.get_theme_node();
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let rise = themeNode.get_length('-arrow-rise');
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switch (this._arrowSide) {
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case St.Side.TOP:
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y += rise;
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break;
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case St.Side.BOTTOM:
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y -= rise;
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break;
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case St.Side.LEFT:
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x += rise;
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break;
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case St.Side.RIGHT:
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x -= rise;
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break;
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}
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Tweener.addTween(this.actor, { opacity: 0,
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x: x,
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y: y,
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transition: "linear",
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time: POPUP_ANIMATION_TIME,
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onComplete: Lang.bind(this, function () {
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this.actor.hide();
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this.actor.x = originalX;
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this.actor.y = originalY;
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if (onComplete)
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onComplete();
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})
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});
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},
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_adjustAllocationForArrow: function(isWidth, alloc) {
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let themeNode = this.actor.get_theme_node();
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let borderWidth = themeNode.get_length('-arrow-border-width');
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alloc.min_size += borderWidth * 2;
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alloc.natural_size += borderWidth * 2;
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if ((!isWidth && (this._arrowSide == St.Side.TOP || this._arrowSide == St.Side.BOTTOM))
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|| (isWidth && (this._arrowSide == St.Side.LEFT || this._arrowSide == St.Side.RIGHT))) {
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let rise = themeNode.get_length('-arrow-rise');
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alloc.min_size += rise;
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alloc.natural_size += rise;
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}
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},
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_getPreferredWidth: function(actor, forHeight, alloc) {
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let [minInternalSize, natInternalSize] = this.bin.get_preferred_width(forHeight);
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alloc.min_size = minInternalSize;
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alloc.natural_size = natInternalSize;
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this._adjustAllocationForArrow(true, alloc);
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},
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_getPreferredHeight: function(actor, forWidth, alloc) {
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let [minSize, naturalSize] = this.bin.get_preferred_height(forWidth);
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alloc.min_size = minSize;
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alloc.natural_size = naturalSize;
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this._adjustAllocationForArrow(false, alloc);
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},
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_allocate: function(actor, box, flags) {
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let themeNode = this.actor.get_theme_node();
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let borderWidth = themeNode.get_length('-arrow-border-width');
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let rise = themeNode.get_length('-arrow-rise');
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let childBox = new Clutter.ActorBox();
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let availWidth = box.x2 - box.x1;
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let availHeight = box.y2 - box.y1;
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childBox.x1 = 0;
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childBox.y1 = 0;
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childBox.x2 = availWidth;
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childBox.y2 = availHeight;
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this._border.allocate(childBox, flags);
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childBox.x1 = borderWidth;
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childBox.y1 = borderWidth;
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childBox.x2 = availWidth - borderWidth;
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childBox.y2 = availHeight - borderWidth;
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switch (this._arrowSide) {
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case St.Side.TOP:
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childBox.y1 += rise;
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break;
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case St.Side.BOTTOM:
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childBox.y2 -= rise;
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break;
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case St.Side.LEFT:
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childBox.x1 += rise;
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break;
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case St.Side.RIGHT:
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childBox.x2 -= rise;
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break;
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}
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this.bin.allocate(childBox, flags);
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},
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_drawBorder: function(area) {
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let themeNode = this.actor.get_theme_node();
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let borderWidth = themeNode.get_length('-arrow-border-width');
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let base = themeNode.get_length('-arrow-base');
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let rise = themeNode.get_length('-arrow-rise');
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let borderRadius = themeNode.get_length('-arrow-border-radius');
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let halfBorder = borderWidth / 2;
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let halfBase = Math.floor(base/2);
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let borderColor = new Clutter.Color();
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themeNode.get_color('-arrow-border-color', borderColor);
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let backgroundColor = new Clutter.Color();
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themeNode.get_color('-arrow-background-color', backgroundColor);
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let [width, height] = area.get_surface_size();
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let [boxWidth, boxHeight] = [width, height];
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if (this._arrowSide == St.Side.TOP || this._arrowSide == St.Side.BOTTOM) {
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boxHeight -= rise;
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} else {
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boxWidth -= rise;
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}
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let cr = area.get_context();
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Clutter.cairo_set_source_color(cr, borderColor);
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// Translate so that box goes from 0,0 to boxWidth,boxHeight,
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// with the arrow poking out of that
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if (this._arrowSide == St.Side.TOP) {
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cr.translate(0, rise);
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} else if (this._arrowSide == St.Side.LEFT) {
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cr.translate(rise, 0);
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}
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cr.moveTo(borderRadius, halfBorder);
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if (this._arrowSide == St.Side.TOP) {
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cr.lineTo(this._arrowOrigin - halfBase, halfBorder);
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cr.lineTo(this._arrowOrigin, halfBorder - rise);
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cr.lineTo(this._arrowOrigin + halfBase, halfBorder);
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}
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cr.lineTo(boxWidth - borderRadius, halfBorder);
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cr.arc(boxWidth - borderRadius - halfBorder, borderRadius + halfBorder, borderRadius,
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3*Math.PI/2, Math.PI*2);
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if (this._arrowSide == St.Side.RIGHT) {
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cr.lineTo(boxWidth - halfBorder, this._arrowOrigin - halfBase);
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cr.lineTo(boxWidth - halfBorder + rise, this._arrowOrigin);
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cr.lineTo(boxWidth - halfBorder, this._arrowOrigin + halfBase);
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}
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cr.lineTo(boxWidth - halfBorder, boxHeight - borderRadius);
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cr.arc(boxWidth - borderRadius - halfBorder, boxHeight - borderRadius - halfBorder, borderRadius,
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0, Math.PI/2);
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if (this._arrowSide == St.Side.BOTTOM) {
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cr.lineTo(this._arrowOrigin + halfBase, boxHeight - halfBorder);
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cr.lineTo(this._arrowOrigin, boxHeight - halfBorder + rise);
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cr.lineTo(this._arrowOrigin - halfBase, boxHeight - halfBorder);
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}
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cr.lineTo(borderRadius, boxHeight - halfBorder);
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cr.arc(borderRadius + halfBorder, boxHeight - borderRadius - halfBorder, borderRadius,
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Math.PI/2, Math.PI);
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if (this._arrowSide == St.Side.LEFT) {
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cr.lineTo(halfBorder, this._arrowOrigin + halfBase);
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cr.lineTo(halfBorder - rise, this._arrowOrigin);
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cr.lineTo(halfBorder, this._arrowOrigin - halfBase);
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}
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cr.lineTo(halfBorder, borderRadius);
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cr.arc(borderRadius + halfBorder, borderRadius + halfBorder, borderRadius,
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Math.PI, 3*Math.PI/2);
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Clutter.cairo_set_source_color(cr, backgroundColor);
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cr.fillPreserve();
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Clutter.cairo_set_source_color(cr, borderColor);
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cr.setLineWidth(borderWidth);
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cr.stroke();
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},
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setPosition: function(sourceActor, gap, alignment) {
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// We need to show it now to force an allocation,
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// so that we can query the correct size.
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this.actor.show();
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// Position correctly relative to the sourceActor
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let [sourceX, sourceY] = sourceActor.get_transformed_position();
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let [sourceWidth, sourceHeight] = sourceActor.get_transformed_size();
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let [minWidth, minHeight, natWidth, natHeight] = this.actor.get_preferred_size();
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// We also want to keep it onscreen, and separated from the
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// edge by the same distance as the main part of the box is
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// separated from its sourceActor
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let primary = global.get_primary_monitor();
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let arrowRise = this.actor.get_theme_node().get_length('-arrow-rise');
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let resX, resY;
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switch (this._arrowSide) {
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case St.Side.TOP:
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resY = sourceY + sourceHeight + gap;
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break;
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case St.Side.BOTTOM:
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resY = sourceY - natHeight - gap;
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break;
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case St.Side.LEFT:
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resX = sourceX + sourceWidth + gap;
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break;
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case St.Side.RIGHT:
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resX = sourceX - natWidth - gap;
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break;
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}
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// Now align and position the pointing axis, making sure
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// it fits on screen
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switch (this._arrowSide) {
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case St.Side.TOP:
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case St.Side.BOTTOM:
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switch (alignment) {
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case St.Align.START:
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resX = sourceX;
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break;
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case St.Align.MIDDLE:
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resX = sourceX - Math.floor((natWidth - sourceWidth) / 2);
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break;
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case St.Align.END:
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resX = sourceX - (natWidth - sourceWidth);
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break;
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}
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resX = Math.min(resX, primary.x + primary.width - natWidth - arrowRise - gap);
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resX = Math.max(resX, primary.x);
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this.setArrowOrigin((sourceX - resX) + Math.floor(sourceWidth / 2));
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break;
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case St.Side.LEFT:
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case St.Side.RIGHT:
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switch (alignment) {
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case St.Align.START:
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resY = sourceY;
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break;
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case St.Align.MIDDLE:
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resY = sourceY - Math.floor((natHeight - sourceHeight) / 2);
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break;
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case St.Align.END:
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resY = sourceY - (natHeight - sourceHeight);
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break;
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}
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resY = Math.min(resY, primary.y + primary.height - natHeight - arrowRise - gap);
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resY = Math.max(resY, primary.y);
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this.setArrowOrigin((sourceY - resY) + Math.floor(sourceHeight / 2));
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break;
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}
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let parent = this.actor.get_parent();
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let success, x, y;
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while (!success) {
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[success, x, y] = parent.transform_stage_point(resX, resY);
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parent = parent.get_parent();
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}
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// Actually set the position
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this.actor.x = Math.floor(x);
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this.actor.y = Math.floor(y);
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},
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// @origin: Coordinate specifying middle of the arrow, along
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// the Y axis for St.Side.LEFT, St.Side.RIGHT from the top and X axis from
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// the left for St.Side.TOP and St.Side.BOTTOM.
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setArrowOrigin: function(origin) {
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if (this._arrowOrigin != origin) {
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this._arrowOrigin = origin;
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this._border.queue_repaint();
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}
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}
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};
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