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Diffstat (limited to 'src/controls/Private/ScrollViewHelper.qml')
| -rw-r--r-- | src/controls/Private/ScrollViewHelper.qml | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/controls/Private/ScrollViewHelper.qml b/src/controls/Private/ScrollViewHelper.qml new file mode 100644 index 000000000..791c5e020 --- /dev/null +++ b/src/controls/Private/ScrollViewHelper.qml @@ -0,0 +1,203 @@ +/**************************************************************************** +** +** 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 2.1 +import QtQuick.Controls 1.0 +import QtQuick.Controls.Private 1.0 + +/*! + \qmltype ScrollViewHeader + \internal + \inqmlmodule QtQuick.Controls.Private 1.0 +*/ +Item { + id: wheelarea + + property alias horizontalScrollBar: hscrollbar + property alias verticalScrollBar: vscrollbar + property bool blockUpdates: false + property int availableHeight + property int availableWidth + property int contentHeight + property int contentWidth + property real originX + property real originY + + property int leftMargin: outerFrame ? root.__style.padding.left : 0 + property int rightMargin: outerFrame ? root.__style.padding.right : 0 + property int topMargin: outerFrame ? root.__style.padding.top : 0 + property int bottomMargin: outerFrame ? root.__style.padding.bottom : 0 + + anchors.fill: parent + + property bool recursionGuard: false + + function doLayout() { + if (!recursionGuard) { + recursionGuard = true + wheelarea.availableWidth = viewport.width + wheelarea.availableHeight = viewport.height + wheelarea.contentWidth = flickableItem !== null ? flickableItem.contentWidth : 0 + wheelarea.contentHeight = flickableItem !== null ? flickableItem.contentHeight : 0 + wheelarea.originX = flickableItem !== null ? flickableItem.originX : 0 + wheelarea.originY = flickableItem !== null ? flickableItem.originY : 0 + recursionGuard = false + } + } + + Connections { + target: viewport + onWidthChanged: doLayout() + onHeightChanged: doLayout() + } + + Connections { + target: flickableItem + onContentWidthChanged: doLayout() + onContentHeightChanged: doLayout() + } + + Connections { + target: flickableItem + onContentXChanged: { + hscrollbar.flash() + vscrollbar.flash() + } + onContentYChanged: { + hscrollbar.flash() + vscrollbar.flash() + } + } + + Loader { + id: cornerFill + z: 1 + sourceComponent: __style.corner + anchors.right: parent.right + anchors.bottom: parent.bottom + anchors.bottomMargin: bottomMargin + anchors.rightMargin: rightMargin + width: visible ? vscrollbar.width : 0 + height: visible ? hscrollbar.height : 0 + visible: hscrollbar.visible && !hscrollbar.isTransient && vscrollbar.visible && !vscrollbar.isTransient + } + + ScrollBar { + id: hscrollbar + isTransient: !!__panel && !!__panel.transient + active: !!__panel && (__panel.sunken || __panel.activeControl !== "none") + enabled: !isTransient || __panel.visible + orientation: Qt.Horizontal + visible: contentWidth > availableWidth + height: visible ? implicitHeight : 0 + z: 1 + maximumValue: contentWidth > availableWidth ? originX + contentWidth - availableWidth : 0 + minimumValue: originX + anchors.bottom: parent.bottom + anchors.left: parent.left + anchors.right: cornerFill.left + anchors.leftMargin: leftMargin + anchors.bottomMargin: bottomMargin + onValueChanged: { + if (!blockUpdates) { + flickableItem.contentX = value + } + } + Binding { + target: hscrollbar.__panel + property: "raised" + value: vscrollbar.active + when: hscrollbar.isTransient + } + Binding { + target: hscrollbar.__panel + property: "visible" + value: true + when: !hscrollbar.isTransient + } + function flash() { + if (hscrollbar.isTransient) { + hscrollbar.__panel.on = true + hscrollbar.__panel.visible = true + } + } + } + + ScrollBar { + id: vscrollbar + isTransient: !!__panel && !!__panel.transient + active: !!__panel && (__panel.sunken || __panel.activeControl !== "none") + enabled: !isTransient || __panel.visible + orientation: Qt.Vertical + visible: contentHeight > availableHeight + width: visible ? implicitWidth : 0 + z: 1 + anchors.bottom: cornerFill.top + maximumValue: contentHeight > availableHeight ? originY + contentHeight - availableHeight + __viewTopMargin : 0 + minimumValue: originY + anchors.right: parent.right + anchors.top: parent.top + anchors.topMargin: __scrollBarTopMargin + topMargin + anchors.rightMargin: rightMargin + onValueChanged: { + if (flickableItem && !blockUpdates && enabled) { + flickableItem.contentY = value + } + } + Binding { + target: vscrollbar.__panel + property: "raised" + value: hscrollbar.active + when: vscrollbar.isTransient + } + Binding { + target: vscrollbar.__panel + property: "visible" + value: true + when: !vscrollbar.isTransient + } + function flash() { + if (vscrollbar.isTransient) { + vscrollbar.__panel.on = true + vscrollbar.__panel.visible = true + } + } + } +} |