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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+// KNOWN ISSUES
+// none
+
+Item {
+ id: popupBehavior
+
+ property bool showing: false
+ property bool whenAlso: true // modifier to the "showing" property
+ property bool consumeCancelClick: true
+ property int delay: 0 // delay before popout becomes visible
+ property int deallocationDelay: 3000 // 3 seconds
+
+ property Component popupComponent
+
+ property alias popup: popupLoader.item // read-only
+ property alias window: popupBehavior.root // read-only
+
+ signal prepareToShow
+ signal prepareToHide
+ signal cancelledByClick
+
+ // implementation
+
+ anchors.fill: parent
+
+ onShowingChanged: notifyChange()
+ onWhenAlsoChanged: notifyChange()
+ function notifyChange() {
+ if(showing && whenAlso) {
+ if(popupLoader.sourceComponent == undefined) {
+ popupLoader.sourceComponent = popupComponent;
+ }
+ } else {
+ mouseArea.enabled = false; // disable before opacity is changed in case it has fading behavior
+ if(Qt.isQtObject(popupLoader.item)) {
+ popupBehavior.prepareToHide();
+ popupLoader.item.opacity = 0;
+ }
+ }
+ }
+
+ property Item root: findRoot()
+ function findRoot() {
+ var p = parent;
+ while(p.parent != undefined)
+ p = p.parent;
+
+ return p;
+ }
+
+ MouseArea {
+ id: mouseArea
+ anchors.fill: parent
+ enabled: false // enabled only when popout is showing
+ onPressed: {
+ popupBehavior.showing = false;
+ mouse.accepted = consumeCancelClick;
+ cancelledByClick();
+ }
+ }
+
+ Loader {
+ id: popupLoader
+ }
+
+ Timer { // visibility timer
+ running: Qt.isQtObject(popupLoader.item) && showing && whenAlso
+ interval: delay
+ onTriggered: {
+ popupBehavior.prepareToShow();
+ mouseArea.enabled = true;
+ popup.opacity = 1;
+ }
+ }
+
+ Timer { // deallocation timer
+ running: Qt.isQtObject(popupLoader.item) && popupLoader.item.opacity == 0
+ interval: deallocationDelay
+ onTriggered: popupLoader.sourceComponent = undefined
+ }
+
+ states: State {
+ name: "active"
+ when: Qt.isQtObject(popupLoader.item) && popupLoader.item.opacity > 0
+ ParentChange { target: popupBehavior; parent: root }
+ }
+ }
+