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Jan Arve Saether authored
Before this patch, I could not adjust the scrollbars in a ScrollArea on a Windows 8.1 desktop computer just because it had a touch screen. The same problem was observed on Linux (with touch screen). Task-number: QTBUG-42806 Change-Id: I6f35c40b0362820d7c1685e1b6fc8474432237eb Reviewed-by:
J-P Nurmi <jpnurmi@theqtcompany.com> Reviewed-by:
Shawn Rutledge <shawn.rutledge@digia.com>
23c6bb1b
/******************************************************************************** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the Qt Quick Controls module of the Qt Toolkit.**** $QT_BEGIN_LICENSE:BSD$** You may use this file under the terms of the BSD license as follows:**** "Redistribution and use in source and binary forms, with or without** modification, are permitted provided that the following conditions are** met:** * Redistributions of source code must retain the above copyright** notice, this list of conditions and the following disclaimer.** * Redistributions in binary form must reproduce the above copyright** notice, this list of conditions and the following disclaimer in** the documentation and/or other materials provided with the** distribution.** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names** of its contributors may be used to endorse or promote products derived** from this software without specific prior written permission.****** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."**** $QT_END_LICENSE$******************************************************************************/import QtQuick 2.2import QtQuick.Controls 1.2import QtQuick.Controls.Private 1.0/*! \qmltype ScrollBar \internal \inqmlmodule QtQuick.Controls.Private*/Item { id: scrollbar property bool isTransient: false property bool active: false property int orientation: Qt.Horizontal property alias minimumValue: slider.minimumValue property alias maximumValue: slider.maximumValue property alias value: slider.value property int singleStep: 20 activeFocusOnTab: false Accessible.role: Accessible.ScrollBar implicitWidth: panelLoader.implicitWidth implicitHeight: panelLoader.implicitHeight property bool upPressed property bool downPressed property bool pageUpPressed property bool pageDownPressed7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
property bool handlePressed
property Item __panel: panelLoader.item
Loader {
id: panelLoader
anchors.fill: parent
sourceComponent: __style ? __style.__scrollbar : null
onStatusChanged: if (status === Loader.Error) console.error("Failed to load Style for", root)
property alias __control: scrollbar
property QtObject __styleData: QtObject {
readonly property alias horizontal: internal.horizontal
readonly property alias upPressed: scrollbar.upPressed
readonly property alias downPressed: scrollbar.downPressed
readonly property alias handlePressed: scrollbar.handlePressed
}
}
MouseArea {
id: internal
property bool horizontal: orientation === Qt.Horizontal
property int pageStep: internal.horizontal ? width : height
property bool scrollToClickposition: internal.scrollToClickPosition
anchors.fill: parent
cursorShape: __panel.visible ? Qt.ArrowCursor : Qt.IBeamCursor // forces a cursor change
property bool autoincrement: false
property bool scrollToClickPosition: __style ? __style.scrollToClickedPosition : 0
// Update hover item
onEntered: if (!pressed) __panel.activeControl = __panel.hitTest(mouseX, mouseY)
onExited: if (!pressed) __panel.activeControl = "none"
onMouseXChanged: if (!pressed) __panel.activeControl = __panel.hitTest(mouseX, mouseY)
hoverEnabled: !Settings.hasTouchScreen
enabled: !Settings.isMobile || !Settings.hasTouchScreen // ### Not ideal, but will usually behave as expected...
preventStealing: true
property var pressedX
property var pressedY
property int oldPosition
property int grooveSize
Timer {
running: upPressed || downPressed || pageUpPressed || pageDownPressed
interval: 350
onTriggered: internal.autoincrement = true
}
Timer {
running: internal.autoincrement
interval: 60
repeat: true
onTriggered: {
if (upPressed && internal.containsMouse)
internal.decrement();
else if (downPressed && internal.containsMouse)
internal.increment();
else if (pageUpPressed)
internal.decrementPage();
else if (pageDownPressed)
internal.incrementPage();
}
}
onPositionChanged: {
if (handlePressed) {
if (!horizontal)
slider.position = oldPosition + (mouseY - pressedY)
else
slider.position = oldPosition + (mouseX - pressedX)
}
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}
onPressed: {
__panel.activeControl = __panel.hitTest(mouseX, mouseY)
scrollToClickposition = scrollToClickPosition
var handleRect = __panel.subControlRect("handle")
var grooveRect = __panel.subControlRect("groove")
grooveSize = horizontal ? grooveRect.width - handleRect.width:
grooveRect.height - handleRect.height;
if (__panel.activeControl === "handle") {
pressedX = mouseX;
pressedY = mouseY;
handlePressed = true;
oldPosition = slider.position;
} else if (__panel.activeControl === "up") {
decrement();
upPressed = Qt.binding(function() {return containsMouse});
} else if (__panel.activeControl === "down") {
increment();
downPressed = Qt.binding(function() {return containsMouse});
} else if (!scrollToClickposition){
if (__panel.activeControl === "upPage") {
decrementPage();
pageUpPressed = true;
} else if (__panel.activeControl === "downPage") {
incrementPage();
pageDownPressed = true;
}
} else { // scroll to click position
slider.position = horizontal ? mouseX - handleRect.width/2 - grooveRect.x
: mouseY - handleRect.height/2 - grooveRect.y
pressedX = mouseX;
pressedY = mouseY;
handlePressed = true;
oldPosition = slider.position;
}
}
onReleased: {
__panel.activeControl = __panel.hitTest(mouseX, mouseY);
autoincrement = false;
upPressed = false;
downPressed = false;
handlePressed = false;
pageUpPressed = false;
pageDownPressed = false;
}
onWheel: {
var stepCount = -(wheel.angleDelta.x ? wheel.angleDelta.x : wheel.angleDelta.y) / 120
if (stepCount != 0) {
if (wheel.modifiers & Qt.ControlModifier || wheel.modifiers & Qt.ShiftModifier)
incrementPage(stepCount)
else
increment(stepCount)
}
}
function incrementPage(stepCount) {
value = boundValue(value + getSteps(pageStep, stepCount))
}
function decrementPage(stepCount) {
value = boundValue(value - getSteps(pageStep, stepCount))
}
function increment(stepCount) {
value = boundValue(value + getSteps(singleStep, stepCount))
}
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function decrement(stepCount) {
value = boundValue(value - getSteps(singleStep, stepCount))
}
function boundValue(val) {
return Math.min(Math.max(val, minimumValue), maximumValue)
}
function getSteps(step, count) {
if (count)
step *= count
return step
}
RangeModel {
id: slider
minimumValue: 0.0
maximumValue: 1.0
value: 0
stepSize: 0.0
inverted: false
positionAtMaximum: internal.grooveSize
}
}
}