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/****************************************************************************
**
** 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 ScrollBarStyle
\internal
\inqmlmodule QtQuick.Controls.Styles 1.0
\brief provides custom styling for scroll bars
The ScrollBar style can only be set as part of a
a \l ScrollViewStyle.
*/
Style {
id: styleitem
/*! This is the current orientation of the scroll bar. */
readonly property bool horizontal: control.orientation === Qt.Horizontal
/*! This property determines if the scrollBar should directly move to
the offset that is clicked by the user or if it should simply increment
or decrement it's position.
The default value is \cfalse.
*/
property bool scrollToClickPosition: true
/*! This is the minimum extent of the scroll bar handle.
The default value is \c 30.
*/
property int minimumHandleLength: 30
/*! This property controls the edge overlap
between the handle and the increment/decrement buttons.
The default value is \c 30.
*/
property int handleOverlap: 1
/*! This component controls the appearance of the
scroll bar background.
*/
property Component background: Item {
implicitWidth: 16
implicitHeight: 16
clip: true
Rectangle {
anchors.fill: parent
color: "#ddd"
border.color: "#aaa"
anchors.rightMargin: horizontal ? -2 : -1
anchors.leftMargin: horizontal ? -2 : 0
anchors.topMargin: horizontal ? 0 : -2
anchors.bottomMargin: horizontal ? -1 : -2
}
}
/*! This component controls the appearance of the
scroll bar handle.
*/
property Component handle: Item {
implicitWidth: 16
implicitHeight: 16
Rectangle {
anchors.fill: parent
color: mouseOver ? "#ddd" : "lightgray"
border.color: "#aaa"
anchors.rightMargin: horizontal ? 0 : -1
anchors.bottomMargin: horizontal ? -1 : 0
Rectangle {
anchors.fill: parent
anchors.margins: 1
color: "transparent"
border.color: "#44ffffff"
}
}
}
/*! This component controls the appearance of the
scroll bar increment button.
*/
property Component incrementControl: Rectangle {
implicitWidth: 16
implicitHeight: 16
Rectangle {
anchors.fill: parent
anchors.bottomMargin: -1
anchors.rightMargin: -1
border.color: "#aaa"
Image {
source: horizontal ? "images/arrow-right.png" : "images/arrow-down.png"
anchors.centerIn: parent
opacity: 0.7
}
gradient: Gradient {
GradientStop {color: control.downPressed ? "lightgray" : "white" ; position: 0}
GradientStop {color: control.downPressed ? "lightgray" : "lightgray" ; position: 1}
}
}
}
/*! This component controls the appearance of the
scroll bar decrement button.
*/
property Component decrementControl: Rectangle {
implicitWidth: 16
implicitHeight: 16
Rectangle {
anchors.fill: parent
anchors.topMargin: horizontal ? 0 : -1
anchors.leftMargin: horizontal ? -1 : 0
anchors.bottomMargin: horizontal ? -1 : 0
anchors.rightMargin: horizontal ? 0 : -1
color: "lightgray"
Image {
source: horizontal ? "images/arrow-left.png" : "images/arrow-up.png"
anchors.centerIn: parent
anchors.verticalCenterOffset: horizontal ? 0 : -1
anchors.horizontalCenterOffset: horizontal ? -1 : 0
opacity: 0.7
}
gradient: Gradient {
GradientStop {color: control.upPressed ? "lightgray" : "white" ; position: 0}
GradientStop {color: control.upPressed ? "lightgray" : "lightgray" ; position: 1}
}
border.color: "#aaa"
}
}
/*! \internal */
property Component panel: Item {
property string activeControl: ""
implicitWidth: horizontal ? 200 : bg.implicitWidth
implicitHeight: horizontal ? bg.implicitHeight : 200
function pixelMetric(arg) {
if (arg === "scrollbarExtent")
return (styleitem.horizontal ? bg.height : bg.width);
return 0;
}
function styleHint(arg) {
return false;
}
function hitTest(argX, argY) {
if (itemIsHit(handleControl, argX, argY))
return "handle"
else if (itemIsHit(upControl, argX, argY))
return "up";
else if (itemIsHit(downControl, argX, argY))
return "down";
else if (itemIsHit(bg, argX, argY)) {
if (styleitem.horizontal && argX < handleControl.x || !styleitem.horizontal && argY < handleControl.y)
return "upPage"
else
return "downPage"
}
return "none";
}
function subControlRect(arg) {
if (arg === "handle") {
return Qt.rect(handleControl.x, handleControl.y, handleControl.width, handleControl.height);
} else if (arg === "groove") {
if (styleitem.horizontal) {
return Qt.rect(upControl.width - styleitem.handleOverlap,
0,
control.width - (upControl.width + downControl.width - styleitem.handleOverlap * 2),
control.height);
} else {
return Qt.rect(0,
upControl.height - styleitem.handleOverlap,
control.width,
control.height - (upControl.height + downControl.height - styleitem.handleOverlap * 2));
}
}
return Qt.rect(0,0,0,0);
}
function itemIsHit(argItem, argX, argY) {
var pos = argItem.mapFromItem(control, argX, argY);
return (pos.x >= 0 && pos.x <= argItem.width && pos.y >= 0 && pos.y <= argItem.height);
}
Loader {
id: upControl
anchors.top: parent.top
anchors.left: parent.left
sourceComponent: decrementControl
property bool mouseOver: activeControl === "up"
property bool pressed: control.upPressed
}
Loader {
id: bg
anchors.top: horizontal ? undefined : upControl.bottom
anchors.bottom: horizontal ? undefined : downControl.top
anchors.left: horizontal ? upControl.right : undefined
anchors.right: horizontal ? downControl.left : undefined
sourceComponent: background
}
Loader {
id: downControl
anchors.bottom: horizontal ? undefined : parent.bottom
anchors.right: horizontal ? parent.right : undefined
sourceComponent: incrementControl
property bool mouseOver: activeControl === "down"
property bool pressed: control.downPressed
}
Loader{
id: handleControl
property bool mouseOver: activeControl === "handle"
property var flickableItem: control.parent.parent.flickableItem
property int extent: Math.max(minimumHandleLength, horizontal ?
(flickableItem.width/flickableItem.contentWidth) * bg.width :
(flickableItem.height/flickableItem.contentHeight) * bg.height)
height: horizontal ? implicitHeight : extent
width: horizontal ? extent : implicitWidth
anchors.top: bg.top
anchors.left: bg.left
anchors.topMargin: horizontal ? 0 : -handleOverlap + (control.value / control.maximumValue) * (bg.height + 2 * handleOverlap- height)
anchors.leftMargin: horizontal ? -handleOverlap + (control.value / control.maximumValue) * (bg.width + 2 * handleOverlap - width) : 0
sourceComponent: handle
}
}
}
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