309 lines
9.3 KiB
QML
309 lines
9.3 KiB
QML
/*
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* Copyright (C) 2011 by Daker Fernandes Pinheiro <dakerfp@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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import QtQuick 2.0
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import org.kde.plasma.core 0.1 as PlasmaCore
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import "private" as Private
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// TODO: create a value indicator for plasma?
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/**
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* An interactive slider component with Plasma look and feel.
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*/
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Item {
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id: slider
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// Common API
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/**
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* type:real
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* How many steps the slider value can be selected within its range value.
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*/
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property alias stepSize: range.stepSize
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/**
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* type:real
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* Minimum value that the slider's value can assume.
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*
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* The default value is 0.
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*/
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property alias minimumValue: range.minimumValue
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/**
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* type:real
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* Maximum value that the slider's value can assume.
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*
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* The default value is 1.
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*/
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property alias maximumValue: range.maximumValue
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/**
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* type:real
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* This property holds the value selected inside the minimum to maximum
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* range of value.
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*
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* The default value is 0.
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*/
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property alias value: range.value
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/**
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* Orientation for this component.
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*
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* The orientation can be either Qt.Horizontal or Qt.Vertical.
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*
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* The default is Qt.Horizontal.
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*/
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property int orientation: Qt.Horizontal
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/**
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* type:bool
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*
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* True if the Slider is being pressed.
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*/
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property alias pressed: mouseArea.pressed
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/**
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* This property holds if a value indicator element will be shown while is
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* dragged or not.
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*
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* @warning The value indicator is not implemented in the Plasma Slider.
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*
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* The default value is false.
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*/
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property bool valueIndicatorVisible: false
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/**
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* This property holds the text being displayed in the value indicator.
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*
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* @warning The value indicator is not implemented in the Plasma Slider.
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*/
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property string valueIndicatorText: value
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// Plasma API
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/**
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* type:bool
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* This property holds if the slider visualizations has an inverted
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* direction.
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*
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* The default value is false.
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*/
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property alias inverted: range.inverted
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width: contents.isVertical ? theme.defaultFont.mSize.height*1.6 : 200
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height: contents.isVertical ? 200 : theme.defaultFont.mSize.height*1.6
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// TODO: needs to define if there will be specific graphics for
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// disabled sliders
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opacity: enabled ? 1.0 : 0.5
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Keys.onUpPressed: {
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if (!enabled || !contents.isVertical)
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return;
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if (inverted)
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value -= stepSize;
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else
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value += stepSize;
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}
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Keys.onDownPressed: {
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if (!enabled || !enabled)
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return;
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if (!contents.isVertical)
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return;
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if (inverted)
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value += stepSize;
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else
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value -= stepSize;
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}
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Keys.onLeftPressed: {
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if (!enabled || contents.isVertical)
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return;
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if (inverted)
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value += stepSize;
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else
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value -= stepSize;
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}
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Keys.onRightPressed: {
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if (!enabled || contents.isVertical)
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return;
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if (inverted)
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value -= stepSize;
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else
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value += stepSize;
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}
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Item {
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id: contents
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// Plasma API
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property bool animated: true
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property real handleWidth: contents.isVertical ? grooveSvg.elementSize("vertical-slider-handle").width : grooveSvg.elementSize("horizontal-slider-handle").width
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property real handleHeight: contents.isVertical ? grooveSvg.elementSize("vertical-slider-handle").height : grooveSvg.elementSize("horizontal-slider-handle").height
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// Convenience API
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property bool isVertical: orientation == Qt.Vertical
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width: contents.isVertical ? slider.height : slider.width
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height: contents.isVertical ? slider.width : slider.height
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rotation: contents.isVertical ? -90 : 0
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anchors.centerIn: parent
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RangeModel {
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id: range
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minimumValue: 0.0
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maximumValue: 1.0
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value: 0
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stepSize: 0.0
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inverted: false
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positionAtMinimum: 0
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positionAtMaximum: contents.width - handle.width
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}
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PlasmaCore.Svg {
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id: grooveSvg
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imagePath: "widgets/slider"
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}
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PlasmaCore.FrameSvgItem {
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id: groove
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imagePath: "widgets/slider"
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prefix: "groove"
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//FIXME: frameSvg should have a minimumSize attribute, could be added to kdelibs 4.7(maybe just the qml binding is enough)?
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height: grooveSvg.elementSize("groove-topleft").height + grooveSvg.elementSize("groove-bottomleft").height
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anchors {
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left: parent.left
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right: parent.right
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verticalCenter: parent.verticalCenter
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}
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}
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PlasmaCore.FrameSvgItem {
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id: highlight
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imagePath: "widgets/slider"
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prefix: "groove-highlight"
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height: groove.height
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width: inverted ? groove.width - handle.x : fakeHandle.x + handle.width/2
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x: inverted ? handle.x : 0
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anchors.verticalCenter: parent.verticalCenter
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//use the same animation when resizing a slider as moving the slider this keeps it in line when using key shortcuts
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Behavior on width {
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enabled: !mouseArea.drag.active && contents.animated
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PropertyAnimation {
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duration: behavior.enabled ? 150 : 0
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easing.type: Easing.OutSine
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}
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}
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visible: range.position > 0 && slider.enabled
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}
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Private.RoundShadow {
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id: shadow
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imagePath: "widgets/slider"
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focusElement: contents.isVertical ? "vertical-slider-focus" : "horizontal-slider-focus"
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hoverElement: contents.isVertical ? "vertical-slider-hover" : "horizontal-slider-hover"
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shadowElement: contents.isVertical ? "vertical-slider-shadow" : "horizontal-slider-shadow"
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state: slider.activeFocus ? "focus" : (mouseArea.containsMouse ? "hover" : "shadow")
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anchors.fill: handle
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//We rotate the handle below, we need to rotate the shadow back as well
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rotation: contents.isVertical ? 90 : 0
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}
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PlasmaCore.SvgItem {
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id: handle
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x: fakeHandle.x
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anchors {
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verticalCenter: groove.verticalCenter
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}
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width: contents.handleWidth
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height: contents.handleHeight
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//Rotate the handle back for vertical slider so all the handles have the same shadow effect
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rotation: contents.isVertical ? 90 : 0
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svg: PlasmaCore.Svg { imagePath: "widgets/slider" }
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elementId: contents.isVertical ? "vertical-slider-handle" : "horizontal-slider-handle"
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Behavior on x {
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id: behavior
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enabled: !mouseArea.drag.active && contents.animated
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PropertyAnimation {
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duration: behavior.enabled ? 150 : 0
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easing.type: Easing.OutSine
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}
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}
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}
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Item {
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id: fakeHandle
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width: handle.width
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height: handle.height
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}
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MouseArea {
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id: mouseArea
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anchors.fill: parent
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enabled: slider.enabled
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drag {
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target: fakeHandle
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axis: Drag.XAxis
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minimumX: range.positionAtMinimum
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maximumX: range.positionAtMaximum
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}
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hoverEnabled: true
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onPressed: {
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// Clamp the value
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var newX = Math.max(mouse.x, drag.minimumX)
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newX = Math.min(newX, drag.maximumX)
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// Debounce the press: a press event inside the handler will not
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// change its position, the user needs to drag it.
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if (Math.abs(newX - fakeHandle.x) > handle.width / 2) {
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range.position = newX - handle.width / 2
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}
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slider.forceActiveFocus()
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}
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}
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}
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Binding {
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target: range
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property: "position"
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value: fakeHandle.x
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}
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// During the drag, we simply ignore position set from the range, this
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// means that setting a value while dragging will not "interrupt" the
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// dragging activity.
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Binding {
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when: !mouseArea.drag.active
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target: fakeHandle
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property: "x"
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value: range.position
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}
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}
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