/usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami/templates/private/PageRow.qml is in qml-module-org-kde-kirigami 1.1.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2016 Marco Martin <mart@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* 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 Library General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import QtQuick 2.5
import QtQuick.Layouts 1.2
import org.kde.kirigami 1.0
Item {
id: root
//BEGIN PROPERTIES
/**
* This property holds the number of items currently pushed onto the view
*/
readonly property alias depth: pagesLogic.count
/**
* The last Page in the Row
*/
readonly property Item lastItem: pagesLogic.count ? pagesLogic.get(pagesLogic.count - 1).page : null
/**
* The currently visible Item
*/
readonly property Item currentItem: mainFlickable.currentItem
/**
* the index of the currently visible Item
*/
property alias currentIndex: mainFlickable.currentIndex
/**
* The initial item when this PageRow is created
*/
property variant initialPage
/**
* The main flickable of this Row
*/
property alias contentItem: mainFlickable
/**
* The default width for a column
* default is wide enough for 30 grid units.
* Pages can override it with their Layout.fillWidth,
* implicitWidth Layout.minimumWidth etc.
*/
property int defaultColumnWidth: Units.gridUnit * 20
/**
* interactive: bool
* If true it will be possible to go back/forward by dragging the
* content themselves with a gesture.
* Otherwise the only way to go back will be programmatically
* default: true
*/
property alias interactive: mainFlickable.interactive
//END PROPERTIES
//BEGIN FUNCTIONS
/**
* Pushes a page on the stack.
* The page can be defined as a component, item or string.
* If an item is used then the page will get re-parented.
* If a string is used then it is interpreted as a url that is used to load a page
* component.
*
* @param page The page can also be given as an array of pages.
* In this case all those pages will
* be pushed onto the stack. The items in the stack can be components, items or
* strings just like for single pages.
* Additionally an object can be used, which specifies a page and an optional
* properties property.
* This can be used to push multiple pages while still giving each of
* them properties.
* When an array is used the transition animation will only be to the last page.
*
* @param properties The properties argument is optional and allows defining a
* map of properties to set on the page.
* @return The new created page
*/
function push(page, properties) {
pop(currentItem);
// figure out if more than one page is being pushed
var pages;
if (page instanceof Array) {
pages = page;
page = pages.pop();
if (page.createObject === undefined && page.parent === undefined && typeof page != "string") {
properties = properties || page.properties;
page = page.page;
}
}
// push any extra defined pages onto the stack
if (pages) {
var i;
for (i = 0; i < pages.length; i++) {
var tPage = pages[i];
var tProps;
if (tPage.createObject === undefined && tPage.parent === undefined && typeof tPage != "string") {
tProps = tPage.properties;
tPage = tPage.page;
}
var container = pagesLogic.initPage(tPage, tProps);
pagesLogic.append(container);
}
}
// initialize the page
var container = pagesLogic.initPage(page, properties);
pagesLogic.append(container);
container.visible = container.page.visible = true;
mainFlickable.currentIndex = container.level;
return container.page
}
/**
* Pops a page off the stack.
* @param page If page is specified then the stack is unwound to that page,
* to unwind to the first page specify
* page as null.
* @return The page instance that was popped off the stack.
*/
function pop(page) {
if (depth == 0) {
return;
}
var oldPage = pagesLogic.get(pagesLogic.count-1).page;
if (page !== undefined) {
// an unwind target has been specified - pop until we find it
while (page != oldPage && pagesLogic.count > 1) {
pagesLogic.remove(oldPage.parent.level);
oldPage = pagesLogic.get(pagesLogic.count-1).page;
}
} else {
pagesLogic.remove(pagesLogic.count-1);
}
}
/**
* Replaces a page on the stack.
* @param page The page can also be given as an array of pages.
* In this case all those pages will
* be pushed onto the stack. The items in the stack can be components, items or
* strings just like for single pages.
* Additionally an object can be used, which specifies a page and an optional
* properties property.
* This can be used to push multiple pages while still giving each of
* them properties.
* When an array is used the transition animation will only be to the last page.
* @param properties The properties argument is optional and allows defining a
* map of properties to set on the page.
* @see push() for details.
*/
function replace(page, properties) {
if (currentIndex>=1)
pop(pagesLogic.get(currentIndex-1).page);
else if (currentIndex==0)
pop();
else
console.warn("There's no page to replace");
return push(page, properties);
}
/**
* Clears the page stack.
* Destroy (or reparent) all the pages contained.
*/
function clear() {
return pagesLogic.clear();
}
function get(idx) {
return pagesLogic.get(idx).page;
}
//END FUNCTIONS
QtObject {
id: pagesLogic
readonly property int count: mainLayout.children.length
property var componentCache
property int roundedDefaultColumnWidth: root.width < root.defaultColumnWidth*2 ? root.width : root.defaultColumnWidth
//NOTE:seems to only work if the array is defined in a declarative way,
//the Object in an imperative way, espacially on Android
Component.onCompleted: {
componentCache = {};
}
//TODO: remove?
function get(id) {
return mainLayout.children[id];
}
function append(item) {
//FIXME: seems that for one loop the x of the item would continue to be 0
item.x = item.level * roundedDefaultColumnWidth;
item.parent = mainLayout;
}
function clear () {
while (mainLayout.children.length > 0) {
remove(0);
}
}
function remove(id) {
if (id < 0 || id >= count) {
print("Tried to remove an invalid page index:" + id);
return;
}
var item = mainLayout.children[id];
if (item.owner) {
item.page.parent = item.owner;
}
//FIXME: why reparent ing is necessary?
//is destroy just an async deleteLater() that isn't executed immediately or it actually leaks?
item.parent = root;
item.destroy();
}
function initPage(page, properties) {
var container = containerComponent.createObject(mainLayout, {
"level": pagesLogic.count,
"page": page
});
var pageComp;
if (page.createObject) {
// page defined as component
pageComp = page;
} else if (typeof page == "string") {
// page defined as string (a url)
pageComp = pagesLogic.componentCache[page];
if (!pageComp) {
pageComp = pagesLogic.componentCache[page] = Qt.createComponent(page);
}
}
if (pageComp) {
if (pageComp.status == Component.Error) {
throw new Error("Error while loading page: " + pageComp.errorString());
} else {
// instantiate page from component
page = pageComp.createObject(container.pageParent, properties || {});
}
} else {
// copy properties to the page
for (var prop in properties) {
if (properties.hasOwnProperty(prop)) {
page[prop] = properties[prop];
}
}
}
container.page = page;
if (page.parent == null || page.parent == container.pageParent) {
container.owner = null;
} else {
container.owner = page.parent;
}
// the page has to be reparented
if (page.parent != container) {
page.parent = container;
}
return container;
}
}
NumberAnimation {
id: scrollAnim
target: mainFlickable
property: "contentX"
duration: Units.longDuration
easing.type: Easing.InOutQuad
}
Flickable {
id: mainFlickable
anchors.fill: parent
boundsBehavior: Flickable.StopAtBounds
contentWidth: mainLayout.childrenRect.width
contentHeight: height
readonly property Item currentItem: {
var idx = Math.min(currentIndex, pagesLogic.count-1)
return idx>=0 ? pagesLogic.get(idx).page : null
}
//clip only when the app has a sidebar
clip: root.x > 0
property int currentIndex: 0
property int firstVisibleLevel: Math.round (contentX / pagesLogic.roundedDefaultColumnWidth)
flickDeceleration: Units.gridUnit * 50
onCurrentItemChanged: {
var itemX = pagesLogic.roundedDefaultColumnWidth * currentIndex;
if (itemX >= contentX && mainFlickable.currentItem && itemX + mainFlickable.currentItem.width <= contentX + mainFlickable.width) {
return;
}
//this catches 0 and NaN (sometimes at startup width can oddly be nan
if (!mainFlickable.width) {
return;
}
scrollAnim.running = false;
scrollAnim.from = contentX;
if (itemX < contentX || !mainFlickable.currentItem) {
scrollAnim.to = Math.max(0, Math.min(itemX, mainFlickable.contentWidth - mainFlickable.width));
} else {
scrollAnim.to = Math.max(0, Math.min(itemX - mainFlickable.width + mainFlickable.currentItem.width, mainFlickable.contentWidth - mainFlickable.width));
}
scrollAnim.running = true;
}
onMovementEnded: {
if (mainLayout.childrenRect.width == 0) {
return;
}
scrollAnim.running = false;
scrollAnim.from = contentX;
scrollAnim.to = pagesLogic.roundedDefaultColumnWidth * firstVisibleLevel
scrollAnim.running = true;
var mappedCurrentItemPos = currentItem.mapToItem(mainFlickable, 0, 0);
//is the current item out of view?
if (mappedCurrentItemPos.x < 0) {
currentIndex = firstVisibleLevel;
} else if (mappedCurrentItemPos.x + currentItem.width > mainFlickable.width) {
currentIndex = Math.min(root.depth-1, firstVisibleLevel + Math.floor(mainFlickable.width/pagesLogic.roundedDefaultColumnWidth)-1);
}
}
onFlickEnded: movementEnded();
Row {
id: mainLayout
add: Transition {
NumberAnimation {
property: "y"
from: mainFlickable.height
to: 0
duration: Units.shortDuration
easing.type: Easing.InOutQuad
}
}
onWidthChanged: {
//current item in view
if (children[mainFlickable.currentIndex].x >= mainFlickable.contentX &&
children[mainFlickable.currentIndex].x + children[mainFlickable.currentIndex].width <= mainFlickable.contentX + mainFlickable.width) {
mainFlickable.contentX = pagesLogic.roundedDefaultColumnWidth * mainFlickable.firstVisibleLevel;
} else {
mainFlickable.contentX = Math.max(0, Math.min(width - mainFlickable.width, mainFlickable.currentIndex * pagesLogic.roundedDefaultColumnWidth));
}
}
//onChildrenChanged: mainFlickable.contentX = pagesLogic.roundedDefaultColumnWidth * mainFlickable.firstVisibleLevel
}
}
Rectangle {
height: Units.smallSpacing
width: root.width * root.width/mainLayout.width
anchors.bottom: parent.bottom
color: Theme.textColor
opacity: 0
x: root.width * mainFlickable.visibleArea.xPosition
onXChanged: {
opacity = 0.3
scrollIndicatorTimer.restart();
}
Behavior on opacity {
OpacityAnimator {
duration: Units.longDuration
easing.type: Easing.InOutQuad
}
}
Timer {
id: scrollIndicatorTimer
interval: Units.longDuration * 4
onTriggered: parent.opacity = 0;
}
}
Component {
id: containerComponent
MouseArea {
id: container
height: mainFlickable.height
width: root.width
state: pendingState
property string pendingState: root.width < root.defaultColumnWidth*2 ? "vertical" : (container.level >= pagesLogic.count - 1 ? "last" : "middle");
//HACK
onPendingStateChanged: {
stateTimer.restart();
}
Timer {
id: stateTimer
interval: 150
onTriggered: container.state = container.pendingState
}
property int level
property int hint: page && page.implicitWidth ? page.implicitWidth : root.defaultColumnWidth
property int roundedHint: Math.floor(root.width/hint) > 0 ? root.width/Math.floor(root.width/hint) : root.width
property Item page
property Item owner
onPageChanged: {
page.parent = container;
page.anchors.fill = container;
}
drag.filterChildren: true
onClicked: root.currentIndex = level;
onFocusChanged: {
if (focus) {
root.currentIndex = level;
}
}
Rectangle {
z: 999
anchors {
top: parent.top
bottom: parent.bottom
right: parent.right
}
width: Math.ceil(Units.smallSpacing / 5)
color: Theme.textColor
opacity: 0.3
visible: container.level < root.depth-1
}
states: [
State {
name: "vertical"
PropertyChanges {
target: container
width: root.width
}
},
State {
name: "last"
PropertyChanges {
target: container
width: {
var page = pagesLogic.get(container.level-1);
Math.max(roundedHint, root.width - (page == undefined ? 0 : page.width))
}
}
},
State {
name: "middle"
PropertyChanges {
target: container
width: pagesLogic.roundedDefaultColumnWidth
}
}
]
transitions: [
Transition {
from: "last,middle"
to: "middle,last"
SequentialAnimation {
NumberAnimation {
property: "width"
duration: Units.longDuration
easing.type: Easing.InOutQuad
}
ScriptAction {
script: mainFlickable.currentItemChanged();
}
}
}
]
}
}
Component.onCompleted: {
if (initialPage) {
push(initialPage, null)
}
}
}
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