| 1 | /**************************************************************************** |
| 2 | ** |
| 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
| 4 | ** All rights reserved. |
| 5 | ** |
| 6 | ** Contact: Nokia Corporation (qt-info@nokia.com) |
| 7 | ** |
| 8 | ** This file is part of a Qt Solutions component. |
| 9 | ** |
| 10 | ** You may use this file under the terms of the BSD license as follows: |
| 11 | ** |
| 12 | ** "Redistribution and use in source and binary forms, with or without |
| 13 | ** modification, are permitted provided that the following conditions are |
| 14 | ** met: |
| 15 | ** * Redistributions of source code must retain the above copyright |
| 16 | ** notice, this list of conditions and the following disclaimer. |
| 17 | ** * Redistributions in binary form must reproduce the above copyright |
| 18 | ** notice, this list of conditions and the following disclaimer in |
| 19 | ** the documentation and/or other materials provided with the |
| 20 | ** distribution. |
| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor |
| 22 | ** the names of its contributors may be used to endorse or promote |
| 23 | ** products derived from this software without specific prior written |
| 24 | ** permission. |
| 25 | ** |
| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| 37 | ** |
| 38 | ****************************************************************************/ |
| 39 | |
| 40 | /*! \page qtsingleapplication-example-loader.html |
| 41 | \title Loading Documents |
| 42 | |
| 43 | The application in this example loads or prints the documents |
| 44 | passed as commandline parameters to further instances of this |
| 45 | application. |
| 46 | |
| 47 | \quotefromfile loader/main.cpp |
| 48 | \printuntil }; |
| 49 | The user interface in this application is a QMainWindow subclass |
| 50 | with a QMdiArea as the central widget. It implements a slot |
| 51 | \c handleMessage() that will be connected to the messageReceived() |
| 52 | signal of the QtSingleApplication class. |
| 53 | |
| 54 | \printuntil } |
| 55 | The MainWindow constructor creates a minimal user interface. |
| 56 | |
| 57 | \printto case Print: |
| 58 | The handleMessage() slot interprets the message passed in as a |
| 59 | filename that can be prepended with \e /print to indicate that |
| 60 | the file should just be printed rather than loaded. |
| 61 | |
| 62 | \printto #include |
| 63 | Loading the file will also activate the window. |
| 64 | |
| 65 | \printto mw |
| 66 | The \c main entry point function creates a QtSingleApplication |
| 67 | object, and creates a message to send to a running instance |
| 68 | of the application. If the message was sent successfully the |
| 69 | process exits immediately. |
| 70 | |
| 71 | \printuntil } |
| 72 | If the message could not be sent the application starts up. Note |
| 73 | that \c false is passed to the call to setActivationWindow() to |
| 74 | prevent automatic activation for every message received, e.g. when |
| 75 | the application should just print a file. Instead, the message |
| 76 | handling function determines whether activation is requested, and |
| 77 | signals that by emitting the needToShow() signal. This is then |
| 78 | simply connected directly to QtSingleApplication's |
| 79 | activateWindow() slot. |
| 80 | */ |