gnome-shell/js/ui/workspacesView.js
Sardem FF7 1b4cff7cdc workspaceThumbnails: Allow mousewheel scrolling
Allow the user to switch the active workspace by using
the mousewheel over the workspace thumbnails.

https://bugzilla.gnome.org/show_bug.cgi?id=642303
2011-02-18 18:12:18 +01:00

945 lines
35 KiB
JavaScript

/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
const Signals = imports.signals;
const Gettext = imports.gettext.domain('gnome-shell');
const _ = Gettext.gettext;
const DND = imports.ui.dnd;
const Main = imports.ui.main;
const Overview = imports.ui.overview;
const Tweener = imports.ui.tweener;
const Workspace = imports.ui.workspace;
const WorkspaceThumbnail = imports.ui.workspaceThumbnail;
const WORKSPACE_SWITCH_TIME = 0.25;
// Note that mutter has a compile-time limit of 36
const MAX_WORKSPACES = 16;
const CONTROLS_POP_IN_TIME = 0.1;
function WorkspacesView(width, height, x, y, workspaces) {
this._init(width, height, x, y, workspaces);
}
WorkspacesView.prototype = {
_init: function(width, height, x, y, workspaces) {
this.actor = new St.Group({ style_class: 'workspaces-view' });
this.actor.set_clip(x, y, width, height);
// The actor itself isn't a drop target, so we don't want to pick on its area
this.actor.set_size(0, 0);
this.actor.connect('destroy', Lang.bind(this, this._onDestroy));
this.actor.connect('style-changed', Lang.bind(this,
function() {
let node = this.actor.get_theme_node();
this._spacing = node.get_length('spacing');
this._computeWorkspacePositions();
}));
this.actor.connect('notify::mapped',
Lang.bind(this, this._onMappedChanged));
this._width = width;
this._height = height;
this._x = x;
this._y = y;
this._zoomScale = 1.0;
this._spacing = 0;
this._activeWorkspaceX = 0; // x offset of active ws while dragging
this._activeWorkspaceY = 0; // y offset of active ws while dragging
this._lostWorkspaces = [];
this._animating = false; // tweening
this._scrolling = false; // swipe-scrolling
this._animatingScroll = false; // programatically updating the adjustment
this._zoomOut = false; // zoom to a larger area
this._inDrag = false; // dragging a window
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
this._workspaces = workspaces;
// Add workspace actors
for (let w = 0; w < global.screen.n_workspaces; w++)
this._workspaces[w].actor.reparent(this.actor);
this._workspaces[activeWorkspaceIndex].actor.raise_top();
// Position/scale the desktop windows and their children after the
// workspaces have been created. This cannot be done first because
// window movement depends on the Workspaces object being accessible
// as an Overview member.
this._overviewShowingId =
Main.overview.connect('showing',
Lang.bind(this, function() {
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomToOverview();
}));
this._scrollAdjustment = new St.Adjustment({ value: activeWorkspaceIndex,
lower: 0,
page_increment: 1,
page_size: 1,
step_increment: 0,
upper: this._workspaces.length });
this._scrollAdjustment.connect('notify::value',
Lang.bind(this, this._onScroll));
this._timeoutId = 0;
this._switchWorkspaceNotifyId =
global.window_manager.connect('switch-workspace',
Lang.bind(this, this._activeWorkspaceChanged));
this._itemDragBeginId = Main.overview.connect('item-drag-begin',
Lang.bind(this, this._dragBegin));
this._itemDragEndId = Main.overview.connect('item-drag-end',
Lang.bind(this, this._dragEnd));
this._windowDragBeginId = Main.overview.connect('window-drag-begin',
Lang.bind(this, this._dragBegin));
this._windowDragEndId = Main.overview.connect('window-drag-end',
Lang.bind(this, this._dragEnd));
this._swipeScrollBeginId = 0;
this._swipeScrollEndId = 0;
},
setZoomScale: function(zoomScale) {
if (zoomScale == this._zoomScale)
return;
this._zoomScale = zoomScale;
if (this._zoomOut) {
// If we are already zoomed out, then we have to reposition.
// Note that when shown initially zoomOut is false, so we
// won't trigger this.
// setZoomScale can be invoked when the workspaces view is
// reallocated. Since we just want to animate things to the
// new position it seems OK to call updateWorkspaceActors
// immediately - adding a tween doesn't immediately cause
// a new allocation. But hide/show of the window overlays we
// do around animation does, so we need to do it later.
// This can be removed when we fix things to not hide/show
// the window overlay.
Meta.later_add(Meta.LaterType.BEFORE_REDRAW,
Lang.bind(this, function() {
this._computeWorkspacePositions();
this._updateWorkspaceActors(true);
}));
}
},
_lookupWorkspaceForMetaWindow: function (metaWindow) {
for (let i = 0; i < this._workspaces.length; i++) {
if (this._workspaces[i].containsMetaWindow(metaWindow))
return this._workspaces[i];
}
return null;
},
getActiveWorkspace: function() {
let active = global.screen.get_active_workspace_index();
return this._workspaces[active];
},
hide: function() {
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
let activeWorkspace = this._workspaces[activeWorkspaceIndex];
activeWorkspace.actor.raise_top();
for (let w = 0; w < this._workspaces.length; w++)
this._workspaces[w].zoomFromOverview();
},
destroy: function() {
this.actor.destroy();
},
getScale: function() {
return this._workspaces[0].scale;
},
syncStacking: function(stackIndices) {
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].syncStacking(stackIndices);
},
// Get the grid position of the active workspace.
getActiveWorkspacePosition: function() {
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
let activeWorkspace = this._workspaces[activeWorkspaceIndex];
return [activeWorkspace.x, activeWorkspace.y];
},
zoomOut: function() {
if (this._zoomOut)
return;
this._zoomOut = true;
this._computeWorkspacePositions();
this._updateWorkspaceActors(true);
},
zoomIn: function() {
if (!this._zoomOut)
return;
this._zoomOut = false;
this._computeWorkspacePositions();
this._updateWorkspaceActors(true);
},
// Compute the position, scale and opacity of the workspaces, but don't
// actually change the actors to match
_computeWorkspacePositions: function() {
let active = global.screen.get_active_workspace_index();
let zoomScale = this._zoomOut ? this._zoomScale : 1;
let scale = zoomScale * this._width / global.screen_width;
let _width = this._workspaces[0].actor.width * scale;
let _height = this._workspaces[0].actor.height * scale;
this._activeWorkspaceX = (this._width - _width) / 2;
this._activeWorkspaceY = (this._height - _height) / 2;
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
workspace.opacity = (this._inDrag && w != active) ? 200 : 255;
workspace.scale = scale;
workspace.x = this._x + this._activeWorkspaceX;
// We adjust the center because the zoomScale is to leave space for
// the expanded workspace control so we want to zoom to either the
// left part of the area or the right part of the area
let offset = 0.5 * (1 - this._zoomScale) * this._width;
let rtl = (St.Widget.get_default_direction () == St.TextDirection.RTL);
if (this._zoomOut)
workspace.x += rtl ? offset : - offset;
// We divide by zoomScale so that adjacent workspaces are always offscreen
// except when we are switching between workspaces
workspace.y = this._y + this._activeWorkspaceY
+ (w - active) * (_height + this._spacing) / zoomScale;
}
},
_scrollToActive: function(showAnimation) {
let active = global.screen.get_active_workspace_index();
this._computeWorkspacePositions();
this._updateWorkspaceActors(showAnimation);
this._updateScrollAdjustment(active, showAnimation);
},
// Update workspace actors parameters to the values calculated in
// _computeWorkspacePositions()
// @showAnimation: iff %true, transition between states
_updateWorkspaceActors: function(showAnimation) {
let active = global.screen.get_active_workspace_index();
let targetWorkspaceNewY = this._y + this._activeWorkspaceY;
let targetWorkspaceCurrentY = this._workspaces[active].y;
let dy = targetWorkspaceNewY - targetWorkspaceCurrentY;
this._animating = showAnimation;
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
Tweener.removeTweens(workspace.actor);
workspace.y += dy;
if (showAnimation) {
let params = { x: workspace.x,
y: workspace.y,
scale_x: workspace.scale,
scale_y: workspace.scale,
opacity: workspace.opacity,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad'
};
// we have to call _updateVisibility() once before the
// animation and once afterwards - it does not really
// matter which tween we use, so we pick the first one ...
if (w == 0) {
this._updateVisibility();
params.onComplete = Lang.bind(this,
function() {
this._animating = false;
this._updateVisibility();
});
}
Tweener.addTween(workspace.actor, params);
} else {
workspace.actor.set_scale(workspace.scale, workspace.scale);
workspace.actor.set_position(workspace.x, workspace.y);
workspace.actor.opacity = workspace.opacity;
if (w == 0)
this._updateVisibility();
}
}
for (let l = 0; l < this._lostWorkspaces.length; l++) {
let workspace = this._lostWorkspaces[l];
Tweener.removeTweens(workspace.actor);
workspace.y += dy;
workspace.actor.show();
workspace.hideWindowsOverlays();
if (showAnimation) {
Tweener.addTween(workspace.actor,
{ y: workspace.x,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
this._cleanWorkspaces)
});
} else {
this._cleanWorkspaces();
}
}
},
_updateVisibility: function() {
let active = global.screen.get_active_workspace_index();
for (let w = 0; w < this._workspaces.length; w++) {
let workspace = this._workspaces[w];
if (this._animating || this._scrolling) {
workspace.hideWindowsOverlays();
workspace.actor.show();
} else {
workspace.showWindowsOverlays();
if (this._inDrag)
workspace.actor.visible = (Math.abs(w - active) <= 1);
else
workspace.actor.visible = (w == active);
}
}
},
_cleanWorkspaces: function() {
if (this._lostWorkspaces.length == 0)
return;
for (let l = 0; l < this._lostWorkspaces.length; l++)
this._lostWorkspaces[l].destroy();
this._lostWorkspaces = [];
this._computeWorkspacePositions();
this._updateWorkspaceActors(false);
},
_updateScrollAdjustment: function(index, showAnimation) {
if (this._scrolling)
return;
this._animatingScroll = true;
if (showAnimation) {
Tweener.addTween(this._scrollAdjustment, {
value: index,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad',
onComplete: Lang.bind(this,
function() {
this._animatingScroll = false;
})
});
} else {
this._scrollAdjustment.value = index;
this._animatingScroll = false;
}
},
updateWorkspaces: function(oldNumWorkspaces, newNumWorkspaces, lostWorkspaces) {
let active = global.screen.get_active_workspace_index();
for (let l = 0; l < lostWorkspaces.length; l++)
lostWorkspaces[l].disconnectAll();
Tweener.addTween(this._scrollAdjustment,
{ upper: newNumWorkspaces,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad'
});
if (newNumWorkspaces > oldNumWorkspaces) {
for (let w = oldNumWorkspaces; w < newNumWorkspaces; w++)
this.actor.add_actor(this._workspaces[w].actor);
this._computeWorkspacePositions();
this._updateWorkspaceActors(false);
} else {
this._lostWorkspaces = lostWorkspaces;
}
this._scrollToActive(true);
},
_activeWorkspaceChanged: function(wm, from, to, direction) {
if (this._scrolling)
return;
this._scrollToActive(true);
},
_onDestroy: function() {
this._scrollAdjustment.run_dispose();
Main.overview.disconnect(this._overviewShowingId);
global.window_manager.disconnect(this._switchWorkspaceNotifyId);
if (this._timeoutId) {
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
}
if (this._itemDragBeginId > 0) {
Main.overview.disconnect(this._itemDragBeginId);
this._itemDragBeginId = 0;
}
if (this._itemDragEndId > 0) {
Main.overview.disconnect(this._itemDragEndId);
this._itemDragEndId = 0;
}
if (this._windowDragBeginId > 0) {
Main.overview.disconnect(this._windowDragBeginId);
this._windowDragBeginId = 0;
}
if (this._windowDragEndId > 0) {
Main.overview.disconnect(this._windowDragEndId);
this._windowDragEndId = 0;
}
},
_onMappedChanged: function() {
if (this.actor.mapped) {
let direction = Overview.SwipeScrollDirection.VERTICAL;
Main.overview.setScrollAdjustment(this._scrollAdjustment,
direction);
this._swipeScrollBeginId = Main.overview.connect('swipe-scroll-begin',
Lang.bind(this, this._swipeScrollBegin));
this._swipeScrollEndId = Main.overview.connect('swipe-scroll-end',
Lang.bind(this, this._swipeScrollEnd));
} else {
Main.overview.disconnect(this._swipeScrollBeginId);
Main.overview.disconnect(this._swipeScrollEndId);
}
},
_dragBegin: function() {
if (this._scrolling)
return;
this._inDrag = true;
this._dragMonitor = {
dragMotion: Lang.bind(this, this._onDragMotion)
};
DND.addDragMonitor(this._dragMonitor);
},
_onDragMotion: function(dragEvent) {
if (Main.overview.animationInProgress)
return DND.DragMotionResult.CONTINUE;
let primary = global.get_primary_monitor();
let activeWorkspaceIndex = global.screen.get_active_workspace_index();
let topWorkspace, bottomWorkspace;
topWorkspace = this._workspaces[activeWorkspaceIndex - 1];
bottomWorkspace = this._workspaces[activeWorkspaceIndex + 1];
let hoverWorkspace = null;
// reactive monitor edges
let topEdge = primary.y;
let switchTop = (dragEvent.y <= topEdge && topWorkspace);
if (switchTop && this._dragOverLastY != topEdge) {
topWorkspace.metaWorkspace.activate(global.get_current_time());
topWorkspace.setReservedSlot(dragEvent.dragActor._delegate);
this._dragOverLastY = topEdge;
return DND.DragMotionResult.CONTINUE;
}
let bottomEdge = primary.y + primary.height - 1;
let switchBottom = (dragEvent.y >= bottomEdge && bottomWorkspace);
if (switchBottom && this._dragOverLastY != bottomEdge) {
bottomWorkspace.metaWorkspace.activate(global.get_current_time());
bottomWorkspace.setReservedSlot(dragEvent.dragActor._delegate);
this._dragOverLastY = bottomEdge;
return DND.DragMotionResult.CONTINUE;
}
this._dragOverLastY = dragEvent.y;
let result = DND.DragMotionResult.CONTINUE;
// check hover state of new workspace area / inactive workspaces
if (topWorkspace) {
if (topWorkspace.actor.contains(dragEvent.targetActor)) {
hoverWorkspace = topWorkspace;
topWorkspace.opacity = topWorkspace.actor.opacity = 255;
result = topWorkspace.handleDragOver(dragEvent.source, dragEvent.dragActor);
} else {
topWorkspace.opacity = topWorkspace.actor.opacity = 200;
}
}
if (bottomWorkspace) {
if (bottomWorkspace.actor.contains(dragEvent.targetActor)) {
hoverWorkspace = bottomWorkspace;
bottomWorkspace.opacity = bottomWorkspace.actor.opacity = 255;
result = bottomWorkspace.handleDragOver(dragEvent.source, dragEvent.dragActor);
} else {
bottomWorkspace.opacity = bottomWorkspace.actor.opacity = 200;
}
}
// handle delayed workspace switches
if (hoverWorkspace) {
if (!this._timeoutId)
this._timeoutId = Mainloop.timeout_add_seconds(1,
Lang.bind(this, function() {
hoverWorkspace.metaWorkspace.activate(global.get_current_time());
hoverWorkspace.setReservedSlot(dragEvent.dragActor._delegate);
return false;
}));
} else {
if (this._timeoutId) {
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
}
}
return result;
},
_dragEnd: function() {
if (this._timeoutId) {
Mainloop.source_remove(this._timeoutId);
this._timeoutId = 0;
}
DND.removeMonitor(this._dragMonitor);
this._inDrag = false;
for (let i = 0; i < this._workspaces.length; i++)
this._workspaces[i].setReservedSlot(null);
},
_swipeScrollBegin: function() {
this._scrolling = true;
},
_swipeScrollEnd: function(overview, result) {
this._scrolling = false;
if (result == Overview.SwipeScrollResult.CLICK) {
let [x, y, mod] = global.get_pointer();
let actor = global.stage.get_actor_at_pos(Clutter.PickMode.ALL,
x, y);
// Only switch to the workspace when there's no application
// windows open. The problem is that it's too easy to miss
// an app window and get the wrong one focused.
let active = global.screen.get_active_workspace_index();
if (this._workspaces[active].isEmpty() &&
this.actor.contains(actor))
Main.overview.hide();
}
if (result == Overview.SwipeScrollResult.SWIPE)
// The active workspace has changed; while swipe-scrolling
// has already taken care of the positioning, the cached
// positions need to be updated
this._computeWorkspacePositions();
// Make sure title captions etc are shown as necessary
this._updateVisibility();
},
// sync the workspaces' positions to the value of the scroll adjustment
// and change the active workspace if appropriate
_onScroll: function(adj) {
if (this._animatingScroll)
return;
let active = global.screen.get_active_workspace_index();
let current = Math.round(adj.value);
if (active != current) {
let metaWorkspace = this._workspaces[current].metaWorkspace;
metaWorkspace.activate(global.get_current_time());
}
let last = this._workspaces.length - 1;
let firstWorkspaceY = this._workspaces[0].actor.y;
let lastWorkspaceY = this._workspaces[last].actor.y;
let workspacesHeight = lastWorkspaceY - firstWorkspaceY;
if (adj.upper == 1)
return;
let currentY = firstWorkspaceY;
let newY = this._y - adj.value / (adj.upper - 1) * workspacesHeight;
let dy = newY - currentY;
for (let i = 0; i < this._workspaces.length; i++) {
this._workspaces[i].hideWindowsOverlays();
this._workspaces[i].actor.visible = Math.abs(i - adj.value) <= 1;
this._workspaces[i].actor.y += dy;
}
},
_getWorkspaceIndexToRemove: function() {
return global.screen.get_active_workspace_index();
}
};
Signals.addSignalMethods(WorkspacesView.prototype);
function WorkspacesDisplay() {
this._init();
}
WorkspacesDisplay.prototype = {
_init: function() {
this.actor = new Shell.GenericContainer();
this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this.actor.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this.actor.connect('allocate', Lang.bind(this, this._allocate));
let controls = new St.Bin({ style_class: 'workspace-controls',
request_mode: Clutter.RequestMode.WIDTH_FOR_HEIGHT,
y_align: St.Align.START,
y_fill: true });
this._controls = controls;
this.actor.add_actor(controls);
controls.reactive = true;
controls.track_hover = true;
controls.connect('notify::hover',
Lang.bind(this, this._onControlsHoverChanged));
controls.connect('scroll-event',
Lang.bind(this, this._onScrollEvent));
this._thumbnailsBox = new WorkspaceThumbnail.ThumbnailsBox();
controls.add_actor(this._thumbnailsBox.actor);
this.workspacesView = null;
this._inDrag = false;
this._zoomOut = false;
this._zoomFraction = 0;
this._nWorkspacesNotifyId = 0;
this._switchWorkspaceNotifyId = 0;
this._itemDragBeginId = 0;
this._itemDragEndId = 0;
this._windowDragBeginId = 0;
this._windowDragEndId = 0;
},
show: function() {
this._controls.show();
this._thumbnailsBox.show();
this._workspaces = [];
for (let i = 0; i < global.screen.n_workspaces; i++) {
let metaWorkspace = global.screen.get_workspace_by_index(i);
this._workspaces[i] = new Workspace.Workspace(metaWorkspace);
}
let rtl = (St.Widget.get_default_direction () == St.TextDirection.RTL);
let totalAllocation = this.actor.allocation;
let totalWidth = totalAllocation.x2 - totalAllocation.x1;
let totalHeight = totalAllocation.y2 - totalAllocation.y1;
let controlsVisible = this._controls.get_theme_node().get_length('visible-width');
totalWidth -= controlsVisible;
// Workspaces expect to have the same ratio as the screen, so take
// this into account when fitting the workspace into the available space
let width, height;
let totalRatio = totalWidth / totalHeight;
let wsRatio = global.screen_width / global.screen_height;
if (wsRatio > totalRatio) {
width = totalWidth;
height = Math.floor(totalWidth / wsRatio);
} else {
width = Math.floor(totalHeight * wsRatio);
height = totalHeight;
}
// Position workspaces in the available space
let [x, y] = this.actor.get_transformed_position();
x = Math.floor(x + Math.abs(totalWidth - width) / 2);
y = Math.floor(y + Math.abs(totalHeight - height) / 2);
if (rtl)
x += controlsVisible;
let newView = new WorkspacesView(width, height, x, y, this._workspaces);
this._updateZoomScale();
if (this.workspacesView)
this.workspacesView.destroy();
this.workspacesView = newView;
this._nWorkspacesNotifyId =
global.screen.connect('notify::n-workspaces',
Lang.bind(this, this._workspacesChanged));
this._restackedNotifyId =
global.screen.connect('restacked',
Lang.bind(this, this._onRestacked));
if (this._itemDragBeginId == 0)
this._itemDragBeginId = Main.overview.connect('item-drag-begin',
Lang.bind(this, this._dragBegin));
if (this._itemDragEndId == 0)
this._itemDragEndId = Main.overview.connect('item-drag-end',
Lang.bind(this, this._dragEnd));
if (this._windowDragBeginId == 0)
this._windowDragBeginId = Main.overview.connect('window-drag-begin',
Lang.bind(this, this._dragBegin));
if (this._windowDragEndId == 0)
this._windowDragEndId = Main.overview.connect('window-drag-end',
Lang.bind(this, this._dragEnd));
this._onRestacked();
this._zoomOut = false;
this._zoomFraction = 0;
this._updateZoom();
},
hide: function() {
this._controls.hide();
this._thumbnailsBox.hide();
if (this._nWorkspacesNotifyId > 0) {
global.screen.disconnect(this._nWorkspacesNotifyId);
this._nWorkspacesNotifyId = 0;
}
if (this._restackedNotifyId > 0){
global.screen.disconnect(this._restackedNotifyId);
this._restackedNotifyId = 0;
}
if (this._itemDragBeginId > 0) {
Main.overview.disconnect(this._itemDragBeginId);
this._itemDragBeginId = 0;
}
if (this._itemEndBeginId > 0) {
Main.overview.disconnect(this._itemDragEndId);
this._itemDragEndId = 0;
}
if (this._windowDragBeginId > 0) {
Main.overview.disconnect(this._windowDragBeginId);
this._windowDragBeginId = 0;
}
if (this._windowDragEndId > 0) {
Main.overview.disconnect(this._windowDragEndId);
this._windowDragEndId = 0;
}
this.workspacesView.destroy();
this.workspacesView = null;
for (let w = 0; w < this._workspaces.length; w++) {
this._workspaces[w].disconnectAll();
this._workspaces[w].destroy();
}
},
// zoomFraction property allows us to tween the controls sliding in and out
set zoomFraction(fraction) {
this._zoomFraction = fraction;
this.actor.queue_relayout();
},
get zoomFraction() {
return this._zoomFraction;
},
_getPreferredWidth: function (actor, forHeight, alloc) {
// pass through the call in case the child needs it, but report 0x0
this._controls.get_preferred_width(forHeight);
},
_getPreferredHeight: function (actor, forWidth, alloc) {
// pass through the call in case the child needs it, but report 0x0
this._controls.get_preferred_height(forWidth);
},
_allocate: function (actor, box, flags) {
let childBox = new Clutter.ActorBox();
let totalWidth = box.x2 - box.x1;
// width of the controls
let [controlsMin, controlsNatural] = this._controls.get_preferred_width(box.y2 - box.y1);
// Amount of space on the screen we reserve for the visible control
let controlsVisible = this._controls.get_theme_node().get_length('visible-width');
let controlsReserved = controlsVisible * (1 - this._zoomFraction) + controlsNatural * this._zoomFraction;
let rtl = (St.Widget.get_default_direction () == St.TextDirection.RTL);
if (rtl) {
childBox.x2 = controlsReserved;
childBox.x1 = childBox.x2 - controlsNatural;
} else {
childBox.x1 = totalWidth - controlsReserved;
childBox.x2 = childBox.x1 + controlsNatural;
}
childBox.y1 = 0;
childBox.y2 = box.y2- box.y1;
this._controls.allocate(childBox, flags);
this._updateZoomScale();
},
_updateZoomScale: function() {
if (!this.workspacesView)
return;
let totalAllocation = this.actor.allocation;
let totalWidth = totalAllocation.x2 - totalAllocation.x1;
let totalHeight = totalAllocation.y2 - totalAllocation.y1;
let [controlsMin, controlsNatural] = this._controls.get_preferred_width(totalHeight);
let controlsVisible = this._controls.get_theme_node().get_length('visible-width');
let zoomScale = (totalWidth - controlsNatural) / (totalWidth - controlsVisible);
this.workspacesView.setZoomScale(zoomScale);
},
_onRestacked: function() {
let stack = global.get_window_actors();
let stackIndices = {};
for (let i = 0; i < stack.length; i++) {
// Use the stable sequence for an integer to use as a hash key
stackIndices[stack[i].get_meta_window().get_stable_sequence()] = i;
}
this.workspacesView.syncStacking(stackIndices);
this._thumbnailsBox.syncStacking(stackIndices);
},
_workspacesChanged: function() {
let oldNumWorkspaces = this._workspaces.length;
let newNumWorkspaces = global.screen.n_workspaces;
let active = global.screen.get_active_workspace_index();
if (oldNumWorkspaces == newNumWorkspaces)
return;
let lostWorkspaces = [];
if (newNumWorkspaces > oldNumWorkspaces) {
// Assume workspaces are only added at the end
for (let w = oldNumWorkspaces; w < newNumWorkspaces; w++) {
let metaWorkspace = global.screen.get_workspace_by_index(w);
this._workspaces[w] = new Workspace.Workspace(metaWorkspace);
}
this._thumbnailsBox.addThumbnails(oldNumWorkspaces, newNumWorkspaces - oldNumWorkspaces);
} else {
// Assume workspaces are only removed sequentially
// (e.g. 2,3,4 - not 2,4,7)
let removedIndex;
let removedNum = oldNumWorkspaces - newNumWorkspaces;
for (let w = 0; w < oldNumWorkspaces; w++) {
let metaWorkspace = global.screen.get_workspace_by_index(w);
if (this._workspaces[w].metaWorkspace != metaWorkspace) {
removedIndex = w;
break;
}
}
lostWorkspaces = this._workspaces.splice(removedIndex,
removedNum);
// Don't let the user try to select this workspace as it's
// making its exit.
for (let l = 0; l < lostWorkspaces.length; l++)
lostWorkspaces[l].setReactive(false);
this._thumbnailsBox.removeThumbmails(removedIndex, removedNum);
}
this.workspacesView.updateWorkspaces(oldNumWorkspaces,
newNumWorkspaces,
lostWorkspaces);
},
_updateZoom : function() {
if (Main.overview.animationInProgress)
return;
let shouldZoom = this._controls.hover || this._inDrag;
if (shouldZoom != this._zoomOut) {
this._zoomOut = shouldZoom;
if (!this.workspacesView)
return;
Tweener.addTween(this,
{ zoomFraction: this._zoomOut ? 1 : 0,
time: WORKSPACE_SWITCH_TIME,
transition: 'easeOutQuad' });
if (shouldZoom)
this.workspacesView.zoomOut();
else
this.workspacesView.zoomIn();
}
},
_onControlsHoverChanged: function() {
this._updateZoom();
},
_dragBegin: function() {
this._inDrag = true;
this._updateZoom();
},
_dragEnd: function() {
this._inDrag = false;
// We do this deferred because drag-end is emitted before dnd.js emits
// event/leave events that were suppressed during the drag. If we didn't
// defer this, we'd zoom out then immediately zoom in because of the
// enter event we received. That would normally be invisible but we
// might as well avoid it.
Meta.later_add(Meta.LaterType.BEFORE_REDRAW,
Lang.bind(this, this._updateZoom));
},
_onScrollEvent: function (actor, event) {
switch ( event.get_scroll_direction() ) {
case Clutter.ScrollDirection.UP:
Main.wm.actionMoveWorkspaceUp();
break;
case Clutter.ScrollDirection.DOWN:
Main.wm.actionMoveWorkspaceDown();
break;
}
}
};
Signals.addSignalMethods(WorkspacesDisplay.prototype);