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/*
* Copyright 2015 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import QtQuick 2.4
import Ubuntu.Components 1.2
import Ubuntu.Components.ListItems 1.0
import QtQml.Models 2.1
MainView {
id: main
width: units.gu(40)
height: units.gu(71)
property bool restrictDragging: true
Action {
id: deleteAction
iconName: "delete"
}
property list<Action> contextualActions: [
Action {
iconName: "edit"
},
Action {
iconName: "share"
},
Action {
iconName: "stock_website"
}
]
Tabs {
Tab {
title: "Dragging with ListModel"
page: Page {
ListView {
onEnabledChanged: print("enabled", enabled)
anchors.fill: parent
ViewItems.selectMode: ViewItems.dragMode
ViewItems.onSelectedIndicesChanged: print(ViewItems.selectedIndices)
function handleDragStarted(event) {
if (!restrictDragging) {
return;
}
if (event.from < 3) {
// the first 3 items are not draggable
event.accept = false;
} else if (event.from >=3 && event.from <= 10) {
// dragging is limited between index 3 and 10
event.minimumIndex = 3;
event.maximumIndex = 10;
} else {
// prevent dragging above index 10
event.minimumIndex = 11;
}
}
function handleDragUpdates(event) {
if (restrictDragging) {
// deal only with indexes >= 3
if (event.to >= 3 && event.to <= 10 && event.from >= 3 && event.from <= 10) {
// live update
model.move(event.from, event.to, 1);
} else if (event.status == ListItemDrag.Dropped) {
model.move(event.from, event.to, 1);
} else {
event.accept = false;
}
} else {
// no restrictions, perform live update
model.move(event.from, event.to, 1);
}
}
ViewItems.onDragUpdated: {
if (event.status == ListItemDrag.Started) {
handleDragStarted(event);
} else {
handleDragUpdates(event);
}
}
model: ListModel {
Component.onCompleted: {
for (var i = 0; i < 3; i++) {
append({label: "List item #"+i, sectionData: "Locked"});
}
for (i = 3; i < 11; i++) {
append({label: "List item #"+i, sectionData: "Limited, live move"});
}
for (i = 11; i < 25; i++) {
append({label: "List item #"+i, sectionData: "Unlimited, drag'n'drop"});
}
}
}
section {
property: "sectionData"
criteria: ViewSection.FullString
delegate: Header {
text: section
}
}
moveDisplaced: Transition {
UbuntuNumberAnimation {
properties: "x,y"
}
}
delegate: ListItem {
id: item
objectName: "ListItem-" + index
leadingActions: ListItemActions {
actions: deleteAction
}
trailingActions: ListItemActions {
actions: contextualActions
}
Rectangle {
anchors.fill: parent
color: item.dragging ? UbuntuColors.blue : "#69aa69"
}
Label {
text: label + " from index #" + index
}
onPressAndHold: {
print("entering/leaving draggable mode")
ListView.view.ViewItems.dragMode = !ListView.view.ViewItems.dragMode;
}
}
}
}
}
Tab {
title: "Using DelegateModel"
page: Page {
ListView {
anchors.fill: parent
model: DelegateModel {
model: ["apple", "pear", "plum", "peach", "nuts", "dates"]
delegate: ListItem { Label { text: modelData } onPressAndHold: dragMode = !dragMode; }
}
ViewItems.onDragUpdated: {
if (event.status == ListItemDrag.Moving) {
event.accept = false
} else if (event.status == ListItemDrag.Dropped) {
var fromData = model.model[event.from];
var list = model.model;
list.splice(event.from, 1);
list.splice(event.to, 0, fromData);
model.model = list;
}
}
}
}
}
}
}
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