kwin/tabbox/qml/IconTabBox.qml
Martin Gräßlin d03c73a223 Add proper key navigation to layout based window switchers
The grabbed key events inside TabBox are forwarded to the declarative
view which passes it to the normal keyPressedEvent() method. This
allows the QML files to handle keyboard navigation themselves.

The views support key navigation natively, though this cannot be
used as we need to update the ModelIndex when a new item is selected.
Also there seems to be a problem if the tabbox is shown again, in
that case the focus seems to be somehow lost. Because of that the
navigation is handled in the Item embedding the list.

REVIEW: 104357
FEATURE: 291916
FIXED-IN: 4.9.0
2012-03-25 11:55:35 +02:00

123 lines
4.1 KiB
QML

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2011 Martin Gräßlin <mgraesslin@kde.org>
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; either version 2 of the License, or
(at your option) any later version.
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 org.kde.plasma.core 0.1 as PlasmaCore
import org.kde.qtextracomponents 0.1
Item {
id: iconsTabBox
property int iconSize
property int imagePathPrefix: (new Date()).getTime()
property alias count: iconsListView.count
property alias margins: hoverItem.margins
property alias currentItem: iconsListView.currentItem
focus: true
function setModel(model) {
iconsListView.model = model;
iconsListView.imageId++;
}
function modelChanged() {
iconsListView.imageId++;
}
PlasmaCore.Theme {
id: theme
}
// just to get the margin sizes
PlasmaCore.FrameSvgItem {
id: hoverItem
imagePath: "widgets/viewitem"
prefix: "hover"
visible: false
}
// delegate
Component {
id: listDelegate
Item {
property alias data: iconItem.data
id: delegateItem
width: iconSize + hoverItem.margins.left + hoverItem.margins.right
height: iconSize + hoverItem.margins.top + hoverItem.margins.bottom
Image {
property variant data: model
id: iconItem
source: "image://client/" + index + "/" + iconsTabBox.imagePathPrefix + "-" + iconsListView.imageId + (index == iconsListView.currentIndex ? "/selected" : "")
sourceSize {
width: iconSize
height: iconSize
}
anchors {
fill: parent
leftMargin: hoverItem.margins.left
rightMargin: hoverItem.margins.right
topMargin: hoverItem.margins.top
bottomMargin: hoverItem.margins.bottom
}
}
MouseArea {
anchors.fill: parent
onClicked: {
iconsListView.currentIndex = index;
iconsListView.currentIndexChanged(iconsListView.currentIndex);
}
}
}
}
ListView {
signal currentIndexChanged(int index)
id: iconsListView
objectName: "listView"
orientation: ListView.Horizontal
// used for image provider URL to trick Qt into reloading icons when the model changes
property int imageId: 0
anchors {
fill: parent
}
clip: true
delegate: listDelegate
highlight: PlasmaCore.FrameSvgItem {
id: highlightItem
imagePath: "widgets/viewitem"
prefix: "hover"
width: iconSize + margins.left + margins.right
height: iconSize + margins.top + margins.bottom
}
highlightMoveDuration: 250
}
/*
* Key navigation on outer item for two reasons:
* @li we have to emit the change signal
* @li on multiple invocation it does not work on the list view. Focus seems to be lost.
**/
Keys.onPressed: {
if (event.key == Qt.Key_Left) {
iconsListView.decrementCurrentIndex();
iconsListView.currentIndexChanged(iconsListView.currentIndex);
} else if (event.key == Qt.Key_Right) {
iconsListView.incrementCurrentIndex();
iconsListView.currentIndexChanged(iconsListView.currentIndex);
}
}
}