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/*
* Copyright 2012 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 2.1
import QtGraphicalEffects 1.0
import org.kde.plasma.mobilecomponents 0.2
import "private"
/**Documented API
Imports:
QtQuick 2.1
Description:
Overlay Drawers are used to expose additional UI elements needed for
small secondary tasks for which the main UI elements are not needed.
For example in Okular Active, an Overlay Drawer is used to display
thumbnails of all pages within a document along with a search field.
This is used for the distinct task of navigating to another page.
Properties:
bool opened:
If true the drawer is open showing the contents of the "drawer"
component.
Item page:
It's the default property. it's the main content of the drawer page,
the part that is always shown
Item contentItem:
It's the part that can be pulled in and out, will act as a sidebar.
**/
AbstractDrawer {
id: root
anchors.fill: parent
z: 9999
default property alias page: mainPage.data
property Item contentItem
property alias opened: browserFrame.open
property int edge: Qt.LeftEdge
property real position: 0
onContentItemChanged: contentItem.parent = drawerPage
onPositionChanged: {
if (!enabled) {
return;
}
if (root.edge == Qt.LeftEdge) {
browserFrame.x = -browserFrame.width + position * browserFrame.width;
} else {
browserFrame.x = root.width - (position * browserFrame.width);
}
}
function open () {
mouseEventListener.startBrowserFrameX = browserFrame.x;
browserFrame.state = "Dragging";
browserFrame.state = "Open";
}
function close () {
mouseEventListener.startBrowserFrameX = browserFrame.x;
browserFrame.state = "Dragging";
browserFrame.state = "Closed";
}
Item {
id: mainPage
anchors.fill: parent
onChildrenChanged: mainPage.children[0].anchors.fill = mainPage
}
Rectangle {
anchors.fill: parent
color: "black"
opacity: 0.6 * (root.edge == Qt.LeftEdge
? ((browserFrame.x + browserFrame.width) / browserFrame.width)
: (1 - browserFrame.x / root.width))
}
MouseArea {
anchors {
right: root.edge == Qt.LeftEdge ? undefined : parent.right
left: root.edge == Qt.LeftEdge ? parent.left : undefined
top: parent.top
bottom: parent.bottom
}
z: 99
width: Units.smallSpacing
onPressed: mouseEventListener.managePressed(mouse)
onPositionChanged: mouseEventListener.positionChanged(mouse)
onReleased: mouseEventListener.released(mouse)
}
MouseArea {
id: mouseEventListener
anchors.fill: parent
drag.filterChildren: true
property int startBrowserFrameX
property int startMouseX
property real oldMouseX
property bool startDragging: false
property string startState
enabled: browserFrame.state != "Closed"
onPressed: managePressed(mouse)
function managePressed(mouse) {
if (drawerPage.children.length == 0) {
mouse.accepted = false;
return;
}
mouse.accepted = true;
startBrowserFrameX = browserFrame.x;
oldMouseX = startMouseX = mouse.x;
startDragging = false;
startState = browserFrame.state;
browserFrame.state = "Dragging";
browserFrame.x = startBrowserFrameX;
}
onPositionChanged: {
if (drawerPage.children.length == 0) {
mouse.accepted = false;
return;
}
if (mouse.x < Units.gridUnit ||
Math.abs(mouse.x - startMouseX) > root.width / 5) {
startDragging = true;
}
if (startDragging) {
browserFrame.x = root.edge == Qt.LeftEdge
? Math.min(0, browserFrame.x + mouse.x - oldMouseX)
: Math.max(root.width - browserFrame.width, browserFrame.x + mouse.x - oldMouseX);
}
oldMouseX = mouse.x;
}
onReleased: {
if (drawerPage.children.length == 0) {
mouse.accepted = false;
return;
}
if (root.edge == Qt.LeftEdge) {
if (mouse.x < Units.gridUnit) {
browserFrame.state = "Closed";
} else if (browserFrame.x - startBrowserFrameX > browserFrame.width / 3) {
browserFrame.state = "Open";
} else if (startBrowserFrameX - browserFrame.x > browserFrame.width / 3) {
browserFrame.state = "Closed";
} else {
browserFrame.state = startState
}
} else {
if (mouse.x > width - Units.gridUnit) {
browserFrame.state = "Closed";
} else if (browserFrame.x - startBrowserFrameX > browserFrame.width / 3) {
browserFrame.state = "Closed";
} else if (startBrowserFrameX - browserFrame.x > browserFrame.width / 3) {
browserFrame.state = "Open";
} else {
browserFrame.state = startState;
}
}
}
onCanceled: {
if (oldMouseX > width - Units.gridUnit) {
browserFrame.state = "Closed";
} else if (Math.abs(browserFrame.x - startBrowserFrameX) > browserFrame.width / 3) {
browserFrame.state = startState == "Open" ? "Closed" : "Open";
} else {
browserFrame.state = "Open";
}
}
onClicked: {
if (Math.abs(startMouseX - mouse.x) > Units.gridUnit) {
return;
}
if ((root.edge == Qt.LeftEdge && mouse.x > browserFrame.width) ||
(root.edge != Qt.LeftEdge && mouse.x < browserFrame.x)) {
browserFrame.state = startState == "Open" ? "Closed" : "Open";
root.clicked();
}
}
Rectangle {
id: browserFrame
z: 100
color: Theme.viewBackgroundColor
anchors {
top: parent.top
bottom: parent.bottom
}
width: {
if (drawerPage.children.length > 0 && drawerPage.children[0].implicitWidth > 0) {
return Math.min( parent.width - Units.gridUnit, drawerPage.children[0].implicitWidth)
} else {
return parent.width - Units.gridUnit * 3
}
}
onXChanged: {
root.position = root.edge == Qt.LeftEdge ? 1 + browserFrame.x/browserFrame.width : (root.width - browserFrame.x)/browserFrame.width;
}
state: "Closed"
onStateChanged: open = (state != "Closed")
property bool open: false
onOpenChanged: {
if (browserFrame.state == "Dragging" || drawerPage.children.length == 0) {
return;
}
if (open) {
browserFrame.state = "Open";
} else {
browserFrame.state = "Closed";
}
}
LinearGradient {
width: Units.gridUnit/2
anchors {
right: root.edge == Qt.LeftEdge ? undefined : parent.left
left: root.edge == Qt.LeftEdge ? parent.right : undefined
top: parent.top
bottom: parent.bottom
}
opacity: root.position == 0 ? 0 : 1
start: Qt.point(0, 0)
end: Qt.point(Units.gridUnit/2, 0)
gradient: Gradient {
GradientStop {
position: 0.0
color: root.edge == Qt.LeftEdge ? Qt.rgba(0, 0, 0, 0.3) : "transparent"
}
GradientStop {
position: root.edge == Qt.LeftEdge ? 0.3 : 0.7
color: Qt.rgba(0, 0, 0, 0.15)
}
GradientStop {
position: 1.0
color: root.edge == Qt.LeftEdge ? "transparent" : Qt.rgba(0, 0, 0, 0.3)
}
}
Behavior on opacity {
NumberAnimation {
duration: Units.longDuration
easing.type: Easing.InOutQuad
}
}
}
MouseArea {
id: drawerPage
anchors {
fill: parent
//leftMargin: Units.gridUnit
}
clip: true
onChildrenChanged: drawerPage.children[0].anchors.fill = drawerPage
}
states: [
State {
name: "Open"
PropertyChanges {
target: browserFrame
x: root.edge == Qt.LeftEdge ? 0 : root.width - browserFrame.width
}
},
State {
name: "Dragging"
//workaround for a quirkiness of the state machine
//if no x binding gets defined in this state x will be set to whatever last x it had last time it was in this state
PropertyChanges {
target: browserFrame
x: mouseEventListener.startBrowserFrameX
}
},
State {
name: "Closed"
PropertyChanges {
target: browserFrame
x: root.edge == Qt.LeftEdge ? -browserFrame.width : root.width
}
}
]
transitions: [
Transition {
//Exclude Dragging
to: "Open,Closed"
NumberAnimation {
id: transitionAnim
properties: "x"
duration: Units.longDuration
easing.type: Easing.InOutQuad
}
}
]
}
}
}
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