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Fix disappearing slider during size/orientation change 

Now the slider remains at a position that is equivalent to the old
position based on the previous percentage.

This change is most commonly triggered during orientation changes on
mobile device. That is the reason why the app was converted to a
proper Qt project. This way it was possible to test this behavior
on Android.

Task-number: QTBUG-18423
Change-Id: If05e6a1e42249f90a821c4882021d28cf212fc52
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
This commit is contained in:
Alex Blasche 2014-09-19 11:46:44 +02:00
parent cce0e1f9c2
commit d2d0bfe830
4 changed files with 80 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
examples/quick/customitems/dialcontrol/dialcontrol.pro Normal file
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@ -0,0 +1,11 @@
TEMPLATE = app
TARGET = dialcontrol
QT += quick qml
SOURCES += main.cpp
RESOURCES += dialcontrol.qrc
target.path = $$[QT_INSTALL_EXAMPLES]/quick/customitems/dialcontrol
INSTALLS += target

19
examples/quick/customitems/dialcontrol/dialcontrol.qml
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@ -1,6 +1,6 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
@ -39,7 +39,8 @@
****************************************************************************/
//! [imports]
import QtQuick 2.0
import QtQuick 2.2
import QtQuick.Window 2.1
import "content"
//! [imports]
@ -53,12 +54,13 @@ Rectangle {
Dial {
id: dial
anchors.centerIn: parent
value: slider.x * 100 / (container.width - 34)
value: slider.x * 100 / (container.width - 32)
}
//! [the dial in use]
Rectangle {
id: container
property int oldWidth: 0
anchors { bottom: parent.bottom; left: parent.left
right: parent.right; leftMargin: 20; rightMargin: 20
bottomMargin: 10
@ -73,6 +75,17 @@ Rectangle {
GradientStop { position: 1.0; color: "white" }
}
onWidthChanged: {
if (oldWidth === 0) {
oldWidth = width;
return
}
var desiredPercent = slider.x * 100 / (oldWidth - 32)
slider.x = desiredPercent * (width - 32) / 100
oldWidth = width
}
Rectangle {
id: slider
x: 1; y: 1; width: 30; height: 14

12
examples/quick/customitems/dialcontrol/dialcontrol.qrc Normal file
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@ -0,0 +1,12 @@
<RCC>
<qresource prefix="/">
<file>dialcontrol.qml</file>
<file>content/background.png</file>
<file>content/Dial.qml</file>
<file>content/needle_shadow.png</file>
<file>content/needle.png</file>
<file>content/overlay.png</file>
<file>content/quit.png</file>
<file>content/QuitButton.qml</file>
</qresource>
</RCC>

41
examples/quick/customitems/dialcontrol/main.cpp Normal file
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@ -0,0 +1,41 @@
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "../../shared/shared.h"
DECLARATIVE_EXAMPLE_MAIN(dialcontrol)