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/*
* This file is part of unity-2d
*
* Copyright 2010-2011 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import QtQuick 1.0
import Unity2d 1.0
import "utils.js" as Utils
Rectangle {
id: switcher
color: "black"
property int columns: desktop.workspaces.columns
property int rows: desktop.workspaces.rows
property int margin: 35
property int spacing: 4
/* Effective area available for laying out the workspaces after considering
inter-workspace spaces */
property int availableWidth: switcher.width - (columns * spacing)
property int availableHeight: switcher.height - (rows * spacing)
property int maxCellWidth: Math.floor(availableWidth / columns)
property int maxCellHeight: Math.floor(availableHeight / rows)
/* Depending on the aspect ratio of the final workspaces layout, we will
have either vertical or horizontal margins. That is, we will either:
- use maxCellWidth as base cell width and compute the height based on the
screen ratio, or
- use maxCellHeight for the base cell height and compute the width based
on the screen ratio.
To figure out which way to go, compute the other size and see how things
would fit inside the screen. */
property int computedCellHeight: maxCellWidth * switcher.height / switcher.width
property int computedCellWidth: maxCellHeight * switcher.width / switcher.height
property bool useWidth: (computedCellHeight + spacing) * rows <= switcher.height
property int cellWidth: useWidth ? maxCellWidth : computedCellWidth
property int cellHeight: useWidth ? computedCellHeight : maxCellHeight
property real cellScale: cellWidth / switcher.width
/* Scale of a workspace when the user zooms on it (fills most of the switcher, leaving a margin to see
the corners of the other workspaces below it) */
property bool isDesktopHorizontal: declarativeView.screen.panelsFreeGeometry.width > declarativeView.screen.panelsFreeGeometry.height
property real zoomedScale: (isDesktopHorizontal) ? ((width - 2*margin) / switcher.width) :
((height - 2*margin) / switcher.height)
/* When this is set, it is used to filter the global list of windows to limit it to
a single application. See the SortFilterProxyModel used in Spread.qml */
property string applicationFilter
/* The number of the currently zoomed workspace (-1 means no workspace)
Use workspaceForNumber to find the actual Workspace component. */
property int zoomedWorkspace: -1
/* This is the master model containing all the windows recognized by bamf for the entire
screen. Each workspace will individually filter them to select only those that
belong to it. */
property variant allWindows: WindowsList { }
property int lastActiveWindow: 0
/* Group all Workspace elements into a single Item to help workspaceByNumber
iterate over less items than it would need to if the Repeater was adding children
to the switcher itself. */
GridView {
id: workspaces
anchors.centerIn: parent
width: cellWidth * columns
height: cellHeight * rows
model: desktop.workspaces.count
cellWidth: parent.cellWidth + spacing
cellHeight: parent.cellHeight + spacing
keyNavigationWraps: true
property string windowFocus
Keys.onPressed: {
if (event.key == Qt.Key_Left || event.key == Qt.Key_Up) {
windowFocus = "last"
} else if (event.key == Qt.Key_Right || event.key == Qt.Key_Down) {
windowFocus = "first"
}
}
highlight: Rectangle {
color: "orange"
x: workspaces.currentItem.x
y: workspaces.currentItem.y
z: -1
width: workspaces.cellWidth
height: workspaces.cellHeight
visible: workspaces.currentItem.state == "unzoomed"
}
highlightFollowsCurrentItem: false
delegate: Workspace {
id: workspace
property int workspaceNumber: index
width: workspaces.cellWidth
height: workspaces.cellHeight
unzoomedScale: switcher.cellScale
/* Center the workspace in 'zoomed' state */
zoomedX: switcher.width * (1 - zoomedScale) / 2
zoomedY: switcher.height * (1 - zoomedScale) / 2
zoomedScale: switcher.zoomedScale
Connections {
target: workspaces
onCurrentIndexChanged: {
if (workspaces.windowFocus == "first") {
setFocusOnFirstWindow()
} else if (workspaces.windowFocus == "last") {
setFocusOnLastWindow()
}
}
}
state: {
if (initial) {
if (desktop.workspaces.current == workspaceNumber) {
return "screen"
} else {
return "unzoomed"
}
} else {
if (zoomedWorkspace == workspaceNumber) {
return "zoomed"
} else {
return "unzoomed"
}
}
}
onEntered: {
if (zoomedWorkspace == -1) {
workspaces.currentIndex = index
}
}
onClicked: {
if (zoomedWorkspace == workspaceNumber) {
activateWorkspace(workspaceNumber)
} else if (zoomedWorkspace == -1) {
if (windowCount <= 1) {
activateWorkspace(workspaceNumber)
} else {
workspaces.currentIndex = index
zoomedWorkspace = workspaceNumber
}
} else {
workspaces.currentIndex = index
zoomedWorkspace = -1
}
}
}
onCurrentIndexChanged: {
zoomedWorkspace = -1
}
}
/* FIXME: bad naming. Ideas: screenModeActivated, initialState */
property bool initial: true
/* This connection receives all commands from the DBUS API */
Connections {
target: control
onShowCurrentWorkspace: {
/* Setup application pre-filtering and initially zoomed desktop, if any
were specified as arguments */
applicationFilter = applicationDesktopFile
zoomedWorkspace = desktop.workspaces.current
show()
}
onShowAllWorkspaces: {
if (desktop.workspaces.count > 1) {
applicationFilter = applicationDesktopFile
zoomedWorkspace = -1
show()
} else {
control.showCurrentWorkspace(applicationDesktopFile)
}
}
onHide: cancelAndExit()
onFilterByApplication: applicationFilter = applicationDesktopFile
}
function show() {
/* Save the currently active window before showing and activating the switcher,
so that we can use it to pre-select the active window on the workspace */
lastActiveWindow = desktop.activeWindow
allWindows.load()
spreadView.show()
spreadView.forceActivateWindow()
workspaces.currentIndex = desktop.workspaces.current
/* This is necessary otherwise we don't get keypresses until the user does a
mouse over on a window */
workspaces.forceActiveFocus()
initial = false
}
/* This controls the exit from the switcher.
Note that we can't just hide the workspaces switcher immediately when the user
wants to activate a window or cancel the switching process. We first want any
transitions to complete, so we need to start this timer, and when it's triggered
it will actually do all that is necessary to hide the switcher and cleanup */
Timer {
id: exitTransitionTimer
interval: Utils.transitionDuration
onTriggered: {
spreadView.hide()
/* Nothing should be allowed to touch the windows anymore here, so it should
be safe to unload them all to save memory.
NOTE: i'm not exactly sure any memory will actually be saved since the biggest
usage is the window screenshots, and Qt is caching them (see SpreadWindow.qml
for the trick I use to force them to refresh and more info on this cache)
*/
allWindows.unload()
zoomedWorkspace = -1
}
}
/* Handle both the ESC keypress and any click on the area outside of the
switcher in the same way: maximize the currently active workspace to screen
size and hide the switcher (effectively canceling the switching operation).
If another workspace was zoomed unzoom it first. */
Keys.onPressed: {
switch (event.key) {
case Qt.Key_Escape:
cancelAndExit()
event.accepted = true
return
case Qt.Key_S:
if (event.modifiers & Qt.MetaModifier) {
cancelAndExit()
event.accepted = true
return
}
break
}
}
Connections {
target: spreadView
onOutsideClick: cancelAndExit()
}
function cancelAndExit() {
initial = true
/* Let the transition finish and then hide the switcher and perform cleanup */
exitTransitionTimer.start()
}
function activateWindow(windowInfo) {
desktop.workspaces.changeCurrent(zoomedWorkspace)
windowInfo.activate()
cancelAndExit()
}
function activateWorkspace(workspaceNumber) {
desktop.workspaces.changeCurrent(workspaceNumber)
cancelAndExit()
}
}
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