/*************************************************************************** plugin.cpp Import tool for various worldmap analysis output files Functions: ------------------- begin : Jan 21, 2004 copyright : (C) 2004 by Tim Sutton email : tim@linfiniti.com ***************************************************************************/ /*************************************************************************** * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * ***************************************************************************/ /* $Id$ */ // includes #include #include #include #include "plugin.h" #include #include #include #include #include #include #include #include #include #include #include #include #include //non qt includes #include //the gui subclass #include "plugingui.h" // xpm for creating the toolbar icon #include "icon.xpm" // static const char * const ident_ = "$Id$"; static const char * const name_ = "NorthArrow"; static const char * const description_ = "This plugin displays a north arrow overlayed onto the map."; static const char * const version_ = "Version 0.1"; static const QgisPlugin::PLUGINTYPE type_ = QgisPlugin::UI; /** * Constructor for the plugin. The plugin is passed a pointer to the main app * and an interface object that provides access to exposed functions in QGIS. * @param qgis Pointer to the QGIS main window * @param _qI Pointer to the QGIS interface object */ Plugin::Plugin(QgisApp * theQGisApp, QgisIface * theQgisInterFace): qgisMainWindowPointer(theQGisApp), qGisInterface(theQgisInterFace), QgisPlugin(name_,description_,version_,type_) { mRotationInt=0; } Plugin::~Plugin() { } /* * Initialize the GUI interface for the plugin */ void Plugin::initGui() { // add a menu with 2 items QPopupMenu *pluginMenu = new QPopupMenu(qgisMainWindowPointer); pluginMenu->insertItem(QIconSet(icon),"&NorthArrow", this, SLOT(run())); menuBarPointer = ((QMainWindow *) qgisMainWindowPointer)->menuBar(); menuIdInt = qGisInterface->addMenu("&Decorations", pluginMenu); // Create the action for tool QAction *myQActionPointer = new QAction("North Arrow", QIconSet(icon), "&Wmi",0, this, "run"); // Connect the action to the run connect(myQActionPointer, SIGNAL(activated()), this, SLOT(run())); //render the arrow each time the map is rendered connect(qGisInterface->getMapCanvas(), SIGNAL(renderComplete()), this, SLOT(renderNorthArrow())); // Add the toolbar toolBarPointer = new QToolBar((QMainWindow *) qgisMainWindowPointer, "Decorations"); toolBarPointer->setLabel("North Arrow"); // Add the zoom previous tool to the toolbar myQActionPointer->addTo(toolBarPointer); refreshCanvas(); } //method defined in interface void Plugin::help() { //implement me! } // Slot called when the buffer menu item is activated void Plugin::run() { PluginGui *myPluginGui=new PluginGui(qgisMainWindowPointer,"North Arrow",true,0); //overides function byt the same name created in .ui myPluginGui->setRotation(mRotationInt); //listen for when the layer has been made so we can draw it connect(myPluginGui, SIGNAL(rotationChanged(int)), this, SLOT(rotationChanged(int))); connect(myPluginGui, SIGNAL(changePlacement(QString)), this, SLOT(setPlacement(QString))); myPluginGui->show(); } //!draw a raster layer in the qui - intended to respond to signal sent by diolog when it as finished creating //layer void Plugin::drawRasterLayer(QString theQString) { qGisInterface->addRasterLayer(theQString); } //!draw a vector layer in the qui - intended to respond to signal sent by diolog when it as finished creating a layer ////needs to be given vectorLayerPath, baseName, providerKey ("ogr" or "postgres"); void Plugin::drawVectorLayer(QString thePathNameQString, QString theBaseNameQString, QString theProviderQString) { qGisInterface->addVectorLayer( thePathNameQString, theBaseNameQString, theProviderQString); } //! Refresh the map display using the mapcanvas exported via the plugin interface void Plugin::refreshCanvas() { qGisInterface->getMapCanvas()->refresh(); } void Plugin::renderNorthArrow() { QPixmap myQPixmap; //to store the north arrow image in QString myFileNameQString = QString(PKGDATAPATH) + QString("/images/north_arrows/default.png"); //std::cout << "Trying to load " << myFileNameQString << std::cout; if (myQPixmap.load(myFileNameQString)) { // myPainterPixmap.fill(); QPainter myQPainter; myQPainter.begin(qGisInterface->getMapCanvas()->canvasPixmap()); double centerXDouble = myQPixmap.width()/2; double centerYDouble = myQPixmap.height()/2; //save the current canvas rotation myQPainter.save(); //myQPainter.translate( (int)centerXDouble, (int)centerYDouble ); //rotate the canvas myQPainter.rotate( mRotationInt ); //work out how to shift the image so that it appears in the center of the canvas //(x cos a + y sin a - x, -x sin a + y cos a - y) const double PI = 3.14159265358979323846; double myRadiansDouble = (PI/180) * mRotationInt; int xShift = static_cast(( (centerXDouble * cos(myRadiansDouble)) + (centerYDouble * sin(myRadiansDouble)) ) - centerXDouble); int yShift = static_cast(( (-centerXDouble * sin(myRadiansDouble)) + (centerYDouble * cos(myRadiansDouble)) ) - centerYDouble); //Get canvas dimensions int myYOffset = qGisInterface->getMapCanvas()->height(); int myXOffset = qGisInterface->getMapCanvas()->width(); //Determine placement of label from form combo box if (mPlacement==tr("Bottom Left")) { //Code required to shift to position } else if (mPlacement==tr("Top Right")) { //Code required to shift to position } else if (mPlacement==tr("Bottom Right")) { //Code required to shift to position } else // defaulting to top left { } //draw the pixmap in the proper position myQPainter.drawPixmap(xShift,yShift,myQPixmap); //unrotate the canvase again myQPainter.restore(); myQPainter.end(); //bitBlt ( qGisInterface->getMapCanvas()->canvasPixmap(), 0, 0, &myPainterPixmap, 0, 0, -1 , -1, Qt::CopyROP, false); } else { //myPainterPixmap.fill(); QPainter myQPainter; myQPainter.begin(qGisInterface->getMapCanvas()->canvasPixmap()); QFont myQFont("time", 32, QFont::Bold); myQPainter.setFont(myQFont); myQPainter.setPen(Qt::black); myQPainter.drawText(10, 20, QString("Pixmap Not Found")); myQPainter.end(); } } // Unload the plugin by cleaning up the GUI void Plugin::unload() { // remove the GUI menuBarPointer->removeItem(menuIdInt); delete toolBarPointer; } void Plugin::rotationChanged(int theInt) { mRotationInt = theInt; refreshCanvas(); } //! set placement of north arrow void Plugin::setPlacement(QString theQString) { mPlacement = theQString; } /** * Required extern functions needed for every plugin * These functions can be called prior to creating an instance * of the plugin class */ // Class factory to return a new instance of the plugin class extern "C" QgisPlugin * classFactory(QgisApp * theQGisAppPointer, QgisIface * theQgisInterfacePointer) { return new Plugin(theQGisAppPointer, theQgisInterfacePointer); } // Return the name of the plugin - note that we do not user class members as // the class may not yet be insantiated when this method is called. extern "C" QString name() { return name_; } // Return the description extern "C" QString description() { return description_; } // Return the type (either UI or MapLayer plugin) extern "C" int type() { return type_; } // Return the version number for the plugin extern "C" QString version() { return version_; } // Delete ourself extern "C" void unload(QgisPlugin * thePluginPointer) { delete thePluginPointer; }