gnome-shell/js/ui/overlay.js
Colin Walters c928b64648 Merge branch 'appmenu'
svn path=/trunk/; revision=68
2008-11-21 00:53:11 +00:00

377 lines
12 KiB
JavaScript

/* -*- mode: js2; js2-basic-offset: 4; -*- */
const Signals = imports.signals;
const Mainloop = imports.mainloop;
const Tweener = imports.tweener.tweener;
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const Gtk = imports.gi.Gtk;
const Main = imports.ui.main;
const Panel = imports.ui.panel;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const AppDisplay = imports.ui.appdisplay;
const OVERLAY_BACKGROUND_COLOR = new Clutter.Color();
OVERLAY_BACKGROUND_COLOR.from_pixel(0x000000ff);
const SIDESHOW_PAD = 6;
const SIDESHOW_MIN_WIDTH = 250;
const SIDESHOW_SEARCH_BG_COLOR = new Clutter.Color();
SIDESHOW_SEARCH_BG_COLOR.from_pixel(0xffffffff);
const SIDESHOW_TEXT_COLOR = new Clutter.Color();
SIDESHOW_TEXT_COLOR.from_pixel(0xffffffff);
// Time for initial animation going into overlay mode
const ANIMATION_TIME = 0.3;
// How much to scale the desktop down by in overlay mode
const DESKTOP_SCALE = 0.75;
// Windows are slightly translucent in the overlay mode
const WINDOW_OPACITY = 0.9 * 255;
// Define a layout scheme for small window counts. For larger
// counts we fall back to an algorithm. We need more schemes here
// unless we have a really good algorithm.
//
// Each triplet is [xCenter, yCenter, scale] where the scale
// is relative to the width of the desktop.
const POSITIONS = {
1: [[0.5, 0.5, 0.8]],
2: [[0.25, 0.5, 0.4], [0.75, 0.5, 0.4]],
3: [[0.2, 0.33, 0.3], [0.5, 0.67, 0.3], [0.8, 0.33, 0.3]],
4: [[0.25, 0.25, 0.3], [0.75, 0.25, 0.3], [0.75, 0.75, 0.3], [0.25, 0.75, 0.3]]
};
function Sideshow(width) {
this._init(width);
}
Sideshow.prototype = {
_init : function(width) {
let me = this;
let global = Shell.global_get();
this._group = new Clutter.Group();
this._group.hide();
global.stage.add_actor(this._group);
let icontheme = Gtk.icon_theme_get_default();
let rect = new Clutter.Rectangle({ color: SIDESHOW_SEARCH_BG_COLOR,
x: SIDESHOW_PAD,
y: Panel.PANEL_HEIGHT + SIDESHOW_PAD,
width: width,
height: 24});
this._group.add_actor(rect);
let searchIconTexture = new Clutter.Texture({ x: SIDESHOW_PAD + 2,
y: rect.y + 2 });
let searchIconPath = icontheme.lookup_icon('gtk-find', 16, 0).get_filename();
searchIconTexture.set_from_file(searchIconPath);
this._group.add_actor(searchIconTexture);
this._searchEntry = new Clutter.Entry({
font_name: "Sans 14px",
x: searchIconTexture.x
+ searchIconTexture.width + 4,
y: searchIconTexture.y,
width: rect.width - (searchIconTexture.x),
height: searchIconTexture.height});
this._group.add_actor(this._searchEntry);
global.stage.set_key_focus(this._searchEntry);
this._searchQueued = false;
this._searchEntry.connect('notify::text', function (se, prop) {
if (me._searchQueued)
return;
Mainloop.timeout_add(250, function() {
me._searchQueued = false;
me._appdisplay.setSearch(me._searchEntry.text);
return false;
});
});
let appsText = new Clutter.Label({ color: SIDESHOW_TEXT_COLOR,
font_name: "Sans Bold 14px",
text: "Applications",
x: SIDESHOW_PAD,
y: this._searchEntry.y + this._searchEntry.height + 10,
height: 16});
this._group.add_actor(appsText);
let menuY = appsText.y + appsText.height + 6;
this._appdisplay = new AppDisplay.AppDisplay(SIDESHOW_PAD,
menuY, width, global.screen_height - menuY);
/* Proxy the activated signal */
this._appdisplay.connect('activated', function(appdisplay) {
me.emit('activated');
});
},
show: function() {
this._group.show();
this._appdisplay.show();
},
hide: function() {
this._group.hide();
this._appdisplay.hide();
}
};
Signals.addSignalMethods(Sideshow.prototype);
function Overlay() {
this._init();
}
Overlay.prototype = {
_init : function() {
let me = this;
let global = Shell.global_get();
this._group = new Clutter.Group();
this.visible = false;
let background = new Clutter.Rectangle({ color: OVERLAY_BACKGROUND_COLOR,
reactive: true,
x: 0,
y: Panel.PANEL_HEIGHT,
width: global.screen_width,
height: global.screen_width - Panel.PANEL_HEIGHT });
this._group.add_actor(background);
this._group.hide();
global.overlay_group.add_actor(this._group);
this._windowClones = []
// TODO - recalculate everything when desktop size changes
this._recalculateSize();
this._sideshow = new Sideshow(this._desktopX - 10);
this._sideshow.connect('activated', function(sideshow) {
// TODO - have some sort of animation/effect while
// transitioning to the new app. We definitely need
// startup-notification integration at least.
me.hide();
});
},
_recalculateSize: function () {
let global = Shell.global_get();
let screenWidth = global.screen_width;
let screenHeight = global.screen_height;
// The desktop windows are shown on top of a scaled down version of the
// desktop. This is positioned at the right side of the screen
this._desktopWidth = screenWidth * DESKTOP_SCALE;
this._desktopHeight = screenHeight * DESKTOP_SCALE;
this._desktopX = screenWidth - this._desktopWidth - 10;
this._desktopY = Panel.PANEL_HEIGHT + (screenHeight - this._desktopHeight - Panel.PANEL_HEIGHT) / 2;
},
show : function() {
if (!this.visible) {
this.visible = true;
let global = Shell.global_get();
global.focus_stage();
let windows = global.get_windows();
let desktopWindow = null;
this._recalculateSize();
for (let i = 0; i < windows.length; i++)
if (windows[i].get_window_type() == Meta.WindowType.DESKTOP)
desktopWindow = windows[i];
// If a file manager is displaying desktop icons, there will be a desktop window.
// This window will have the size of the whole desktop. When such window is not present
// (e.g. when the preference for showing icons on the desktop is disabled by the user
// or we are running inside a Xephyr window), we should create a desktop rectangle
// to serve as the background.
if (desktopWindow)
this._createDesktopClone(desktopWindow);
else
this._createDesktopRectangle();
// Count the total number of windows so we know what layout scheme to use
let numberOfWindows = 0;
for (let i = 0; i < windows.length; i++) {
let w = windows[i];
if (w == desktopWindow || w.is_override_redirect())
continue;
numberOfWindows++;
}
// Now create actors for all the desktop windows. Do it in
// reverse order so that the active actor ends up on top
let windowIndex = 0;
for (let i = windows.length - 1; i >= 0; i--) {
let w = windows[i];
if (w == desktopWindow || w.is_override_redirect())
continue;
this._createWindowClone(w, numberOfWindows - windowIndex - 1, numberOfWindows);
windowIndex++;
}
this._sideshow.show();
// All the the actors in the window group are completely obscured,
// hiding the group holding them while the overlay is displayed greatly
// increases performance of the overlay especially when there are many
// windows visible.
//
// If we switched to displaying the actors in the overlay rather than
// clones of them, this would obviously no longer be necessary.
global.window_group.hide()
this._group.show();
}
},
hide : function() {
if (this.visible) {
let global = Shell.global_get();
this.visible = false;
global.window_group.show()
this._group.hide();
for (let i = 0; i < this._windowClones.length; i++) {
this._windowClones[i].destroy();
}
this._sideshow.hide();
this._windowClones = [];
}
},
_createDesktopClone : function(w) {
let clone = new Clutter.CloneTexture({ parent_texture: w.get_texture(),
reactive: true,
x: 0,
y: 0 });
this._addDesktop(clone);
},
_createDesktopRectangle : function() {
let global = Shell.global_get();
// In the case when we have a desktop window from the file manager, its height is
// full-screen, i.e. it includes the height of the panel, so we should not subtract
// the height of the panel from global.screen_height here either to have them show
// up identically.
// We are also using (0,0) coordinates in both cases which makes the background
// window animate out from behind the panel.
let desktopRectangle = new Clutter.Rectangle({ color: global.stage.color,
reactive: true,
x: 0,
y: 0,
width: global.screen_width,
height: global.screen_height });
this._addDesktop(desktopRectangle);
},
_addDesktop : function(desktop) {
let me = this;
this._windowClones.push(desktop);
this._group.add_actor(desktop);
Tweener.addTween(desktop,
{ x: this._desktopX,
y: this._desktopY,
scale_x: DESKTOP_SCALE,
scale_y: DESKTOP_SCALE,
time: ANIMATION_TIME,
transition: "linear"
});
desktop.connect("button-press-event",
function() {
me._deactivate();
});
},
// windowIndex == 0 => top in stacking order
_computeWindowPosition : function(windowIndex, numberOfWindows) {
if (numberOfWindows in POSITIONS)
return POSITIONS[numberOfWindows][windowIndex];
// If we don't have a predefined scheme for this window count, overlap the windows
// along the diagonal of the desktop (improve this!)
let fraction = Math.sqrt(1/numberOfWindows);
// The top window goes at the lower right - this is different from the
// fixed position schemes where the windows are in "reading order"
// and the top window goes at the upper left.
let pos = (numberOfWindows - windowIndex - 1) / (numberOfWindows - 1);
let xCenter = (fraction / 2) + (1 - fraction) * pos;
let yCenter = xCenter;
return [xCenter, yCenter, fraction];
},
_createWindowClone : function(w, windowIndex, numberOfWindows) {
let me = this;
// We show the window using "clones" of the texture .. separate
// actors that mirror the original actors for the window. For
// animation purposes, it may be better to actually move the
// original actors about instead.
let clone = new Clutter.CloneTexture({ parent_texture: w.get_texture(),
reactive: true,
x: w.x,
y: w.y });
let [xCenter, yCenter, fraction] = this._computeWindowPosition(windowIndex, numberOfWindows);
let desiredSize = this._desktopWidth * fraction;
xCenter = this._desktopX + xCenter * this._desktopWidth;
yCenter = this._desktopY + yCenter * this._desktopHeight;
let size = clone.width;
if (clone.height > size)
size = clone.height;
// Never scale up
let scale = desiredSize / size;
if (scale > 1)
scale = 1;
this._group.add_actor(clone);
this._windowClones.push(clone);
Tweener.addTween(clone,
{ x: xCenter - 0.5 * scale * w.width,
y: yCenter - 0.5 * scale * w.height,
scale_x: scale,
scale_y: scale,
time: ANIMATION_TIME,
opacity: WINDOW_OPACITY,
transition: "linear"
});
clone.connect("button-press-event",
function(clone, event) {
me._activateWindow(w, event.get_time());
});
},
_activateWindow : function(w, time) {
this._deactivate();
w.get_meta_window().activate(time);
},
_deactivate : function() {
Main.hide_overlay();
}
};