plasma-framework/declarativeimports/plasmacomponents/qml/SectionScroller.qml
2011-12-22 18:40:15 +01:00

179 lines
5.8 KiB
QML

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/**Documented API
Inherits:
Item
Imports:
QtQuick 1.1
org.kde.plasma.core
SectionScroller.js
Description:
It's similar to a ScrollBar or a ScrollDecorator.
It's interactive and works on ListViews that have section.property set,
so its contents are categorized.
An indicator will say to what category the user scrolled to.
Useful for things like address books or things sorted by date.
Don't use with models too big (thousands of items) because implies
loading all the items to memory, as well loses precision.
Properties:
ListView listView:
As The ScrollBar, this is the listview the sectionScroller will operate on. This component doesn't work with simple Flickable or GridView.
**/
import QtQuick 1.1
import "private/SectionScroller.js" as Sections
import org.kde.plasma.core 0.1 as PlasmaCore
Item {
id: root
/**
* The listview this scroll indicator will work on
*/
property ListView listView
onListViewChanged: {
if (listView && listView.model)
internal.initDirtyObserver();
}
Connections {
target: listView
onModelChanged: {
if (listView && listView.model) {
internal.initDirtyObserver()
}
}
}
width: 22
Behavior on opacity {
NumberAnimation {
duration: 250
}
}
anchors {
right: listView.right
top: listView.top
bottom: listView.bottom
}
RangeModel {
id: range
minimumValue: 0
maximumValue: Math.max(0, listView.contentHeight - listView.height)
stepSize: 0
//inverted: true
positionAtMinimum: root.width*2
positionAtMaximum: root.height - root.width*2
value: listView.contentY
onPositionChanged: sectionLabel.text = Sections.closestSection(position/listView.height)
}
ScrollBar {
id: scrollBar
flickableItem: listView
anchors.fill: parent
interactive: true
}
PlasmaCore.FrameSvgItem {
imagePath: "widgets/tooltip"
width: sectionLabel.paintedWidth + margins.left + margins.right
height: sectionLabel.paintedHeight + margins.top + margins.bottom
Label {
id: sectionLabel
font.pointSize: theme.defaultFont.pointSize*3
x: parent.margins.left
y: parent.margins.top
}
y: Math.min(root.height-height-scrollBar.width, Math.max(scrollBar.width, range.position - height/2))
anchors {
//verticalCenter: handle.verticalCenter
right: parent.left
}
opacity: sectionLabel.text && scrollBar.pressed?1:0
Behavior on opacity {
NumberAnimation {
duration: 250
}
}
}
QtObject {
id: internal
function initDirtyObserver() {
Sections.initSectionData(listView);
function dirtyObserver() {
if (!internal.modelDirty) {
internal.modelDirty = true;
dirtyTimer.running = true;
}
}
if (listView.model.countChanged)
listView.model.countChanged.connect(dirtyObserver);
if (listView.model.itemsChanged)
listView.model.itemsChanged.connect(dirtyObserver);
if (listView.model.itemsInserted)
listView.model.itemsInserted.connect(dirtyObserver);
if (listView.model.itemsMoved)
listView.model.itemsMoved.connect(dirtyObserver);
if (listView.model.itemsRemoved)
listView.model.itemsRemoved.connect(dirtyObserver);
sectionsRepeater.model = Sections._sections.length
}
}
}