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Diffstat (limited to 'doc/src/snippets/declarative/events.qml')
-rw-r--r-- | doc/src/snippets/declarative/events.qml | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/doc/src/snippets/declarative/events.qml b/doc/src/snippets/declarative/events.qml new file mode 100644 index 0000000..3dc44f2 --- /dev/null +++ b/doc/src/snippets/declarative/events.qml @@ -0,0 +1,141 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 Nokia Corporation 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." +** $QT_END_LICENSE$ +** +****************************************************************************/ +//![document] +import QtQuick 1.0 + +//![parent begin] +Rectangle { +//![parent begin] + + id: screen + width: 400; height: 500 + +//! [signal declaration] + signal trigger + signal send (string notice) + signal perform (string task, variant object) +//! [signal declaration] + +//! [signal handler declaration] +onTrigger: console.log("trigger signal emitted") + +onSend: { + console.log("send signal emitted with notice: " + notice) +} + +onPerform: console.log("perform signal emitted") +//! [signal handler declaration] + +//! [automatic signals] +Rectangle { + id: sprite + width: 25; height: 25 + x: 50; y: 15 + + onXChanged: console.log("x property changed, emitted xChanged signal") + onYChanged: console.log("y property changed, emitted yChanged signal") +} +//! [automatic signals] + +//! [signal emit] +Rectangle { + id: messenger + + signal send( string person, string notice) + + onSend: { + console.log("For " + person + ", the notice is: " + notice) + } + + Component.onCompleted: messenger.send("Tom", "the door is ajar.") +} +//! [signal emit] + +//! [connect method] +Rectangle { + id: relay + + signal send( string person, string notice) + onSend: console.log("Send signal to: " + person + ", " + notice) + + Component.onCompleted: { + relay.send.connect(sendToPost) + relay.send.connect(sendToTelegraph) + relay.send.connect(sendToEmail) + relay.send("Tom", "Happy Birthday") + } + + function sendToPost(person, notice) { + console.log("Sending to post: " + person + ", " + notice) + } + function sendToTelegraph(person, notice) { + console.log("Sending to telegraph: " + person + ", " + notice) + } + function sendToEmail(person, notice) { + console.log("Sending to email: " + person + ", " + notice) + } +} +//! [connect method] + +//! [forward signal] +Rectangle { + id: forwarder + width: 100; height: 100 + + signal send() + onSend: console.log("Send clicked") + + MouseArea { + id: mousearea + anchors.fill: parent + onClicked: console.log("MouseArea clicked") + } + Component.onCompleted: { + mousearea.clicked.connect(send) + } +} +//! [forward signal] + +//! [connect method] +//![parent end] +} +//![parent end] + +//![document] |