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roadgraphplugin.cpp
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roadgraphplugin.cpp
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/***************************************************************************
roadgraphplugin.cpp - implemention of plugin
--------------------------------------
Date : 2010-10-10
Copyright : (C) 2010 by Yakushev Sergey
Email : YakushevS <at> list.ru
****************************************************************************
* *
* 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. *
* *
***************************************************************************/
// QGIS Specific includes
#include <qgsapplication.h>
#include <qgisinterface.h>
#include <qgisgui.h>
#include <qgsmapcanvas.h>
#include <qgsproject.h>
#include <qgsmaptoolemitpoint.h>
#include <qgsmaprenderer.h>
#include <qgsmaplayerregistry.h>
#include <qgsvectorlayer.h>
#include <qgsvectordataprovider.h>
// Road grap plugin includes
#include "roadgraphplugin.h"
#include "shortestpathwidget.h"
#include "settingsdlg.h"
#include "linevectorlayerdirector.h"
#include "linevectorlayersettings.h"
#include "simplegraphbuilder.h"
//
// Qt4 Related Includes
//
#include <QAction>
#include <QLabel>
#include <QLocale>
#include <QToolBar>
#include <QPainter>
#include <QPushButton>
#include <QDockWidget>
#include <QVBoxLayout>
#include <QDebug>
// standard includes
static const char * const sIdent = "$Id: roadgraphplugin.cpp 9327 2009-04-20 10:09:44Z YEKST $";
static const QString sName = QObject::tr( "Road graph plugin" );
static const QString sDescription = QObject::tr( "It solve shortest path poblem." );
static const QString sPluginVersion = QObject::tr( "Version 0.1" );
static const QgisPlugin::PLUGINTYPE sPluginType = QgisPlugin::UI;
//////////////////////////////////////////////////////////////////////
//
// THE FOLLOWING METHODS ARE MANDATORY FOR ALL PLUGINS
//
//////////////////////////////////////////////////////////////////////
/**
* Constructor for the plugin. The plugin is passed a pointer
* an interface object that provides access to exposed functions in QGIS.
* @param theQgisInterface - Pointer to the QGIS interface object
*/
RoadGraphPlugin::RoadGraphPlugin( QgisInterface * theQgisInterface ):
QgisPlugin( sName, sDescription, sPluginVersion, sPluginType ),
mQGisIface( theQgisInterface )
{
mQShortestPathDock = NULL;
mSettings = new RgLineVectorLayerSettings();
mTimeUnitName = "h";
mDistanceUnitName = "km";
}
RoadGraphPlugin::~RoadGraphPlugin()
{
}
/*
* Initialize the GUI interface for the plugin - this is only called once when the plugin is
* added to the plugin registry in the QGIS application.
*/
void RoadGraphPlugin::initGui()
{
// create shorttest path dock
mQShortestPathDock = new RgShortestPathWidget( mQGisIface->mainWindow() , this );
mQGisIface->addDockWidget( Qt::LeftDockWidgetArea, mQShortestPathDock );
// Create the action for tool
mQSettingsAction = new QAction( QIcon( ":/roadgraph/road.png" ), tr( "Road graph settings" ), this );
mQShowDirectionAction = new QAction( QIcon( ":/roadgraph/showdirect.png" ), tr( "Show roads direction" ), this );
mInfoAction = new QAction( QIcon( ":/roadgraph/about.png" ), tr( "About" ), this );
// Set the what's this text
mQSettingsAction->setWhatsThis( tr( "Road graph plugin settings" ) );
mQShowDirectionAction->setWhatsThis( tr( "Roads direction viewer" ) );
mInfoAction->setWhatsThis( tr( "About Road graph plugin" ) );
mQShowDirectionAction->setCheckable( true );
setGuiElementsToDefault();
// Connect the action to slots
connect( mQSettingsAction, SIGNAL( triggered() ), this, SLOT( property() ) );
connect( mQShowDirectionAction, SIGNAL( triggered() ), this, SLOT( onShowDirection() ) );
connect( mInfoAction, SIGNAL( triggered() ), SLOT( about() ) );
// Add the icons to the toolbar
mQGisIface->addToolBarIcon( mQShowDirectionAction );
mQGisIface->addPluginToMenu( tr( "Road graph" ), mQSettingsAction );
mQGisIface->addPluginToMenu( tr( "Road graph" ), mQShowDirectionAction );
mQGisIface->addPluginToMenu( tr( "Road graph" ), mInfoAction );
connect( mQGisIface->mapCanvas(), SIGNAL( renderComplete( QPainter* ) ), this, SLOT( render( QPainter* ) ) );
connect( mQGisIface, SIGNAL( projectRead() ), this, SLOT( projectRead() ) );
connect( mQGisIface , SIGNAL( newProjectCreated() ), this, SLOT( newProject() ) );
// load settings
projectRead();
} // RoadGraphPlugin::initGui()
// Unload the plugin by cleaning up the GUI
void RoadGraphPlugin::unload()
{
// remove the GUI
mQGisIface->removePluginMenu( tr( "Road graph" ), mQSettingsAction );
mQGisIface->removePluginMenu( tr( "Road graph" ), mQShowDirectionAction );
mQGisIface->removeToolBarIcon( mQShowDirectionAction );
// disconnect
disconnect( mQGisIface->mapCanvas(), SIGNAL( renderComplete( QPainter* ) ), this, SLOT( render( QPainter* ) ) );
disconnect( mQGisIface->mainWindow(), SIGNAL( projectRead() ), this, SLOT( projectRead() ) );
disconnect( mQGisIface->mainWindow(), SIGNAL( newProject() ), this, SLOT( newProject() ) );
delete mQSettingsAction;
delete mQShowDirectionAction;
delete mQShortestPathDock;
} // RoadGraphPlugin::unload()
void RoadGraphPlugin::setGuiElementsToDefault()
{
} // RoadGraphPlugin::setGuiElementsToDefault()
//method defined in interface
void RoadGraphPlugin::help()
{
//implement me!
} // RoadGraphPlugin::help()
void RoadGraphPlugin::onShowDirection()
{
mQGisIface->mapCanvas()->refresh();
} // RoadGraphPlugin::onShowDirection()
void RoadGraphPlugin::newProject()
{
setGuiElementsToDefault();
}
void RoadGraphPlugin::property()
{
RgSettingsDlg dlg( mSettings, mQGisIface->mainWindow(), QgisGui::ModalDialogFlags );
dlg.setTimeUnitName( mTimeUnitName );
dlg.setDistanceUnitName( mDistanceUnitName );
if ( !dlg.exec() )
return;
mTimeUnitName = dlg.timeUnitName();
mDistanceUnitName = dlg.distanceUnitName();
mSettings->write( QgsProject::instance() );
QgsProject::instance()->writeEntry( "roadgraphplugin", "/pluginTimeUnit", mTimeUnitName );
QgsProject::instance()->writeEntry( "roadgraphplugin", "/pluginDistanceUnit", mDistanceUnitName );
setGuiElementsToDefault();
} //RoadGraphPlugin::property()
void RoadGraphPlugin::about()
{
QDialog dlg( mQGisIface->mainWindow() );
dlg.setWindowFlags( dlg.windowFlags() | Qt::MSWindowsFixedSizeDialogHint );
dlg.setWindowFlags( dlg.windowFlags() &~ Qt::WindowContextHelpButtonHint );
dlg.setWindowTitle( tr( "About RoadGraph" ) );
QVBoxLayout *lines = new QVBoxLayout( &dlg );
QLabel *title = new QLabel( "<b>RoadGraph plugin</b>" );
title->setAlignment( Qt::AlignHCenter | Qt::AlignVCenter );
QLabel *version = new QLabel( sPluginVersion );
version->setAlignment( Qt::AlignHCenter | Qt::AlignVCenter );
lines->addWidget( title );
lines->addWidget( version );
lines->addWidget( new QLabel( tr( "Find shortest path on roads graph" ) ) );
lines->addWidget( new QLabel( tr( "<b>Developers:</b>" ) ) );
lines->addWidget( new QLabel( " Sergey Yakushev" ) );
lines->addWidget( new QLabel( tr( "<b>Homepage:</b>" ) ) );
QSettings settings;
QString localeFullName, localeShortName;
bool overrideLocale = settings.value( "locale/overrideFlag", QVariant( false ) ).toBool();
if ( !overrideLocale )
{
localeFullName = QLocale().system().name();
}
else
{
localeFullName = settings.value( "locale/userLocale", QVariant( "" ) ).toString();
}
localeShortName = localeFullName.left( 2 );
QLabel *link = new QLabel();
if ( localeShortName == "ru" || localeShortName == "uk" )
{
link->setText( "<a href=\"http://gis-lab.info/qa/road-graph.html\">http://gis-lab.info/qa/road-graph.html</a>" );
}
else
{
link->setText( "<a href=\"http://gis-lab.info/qa/road-graph-eng.html\">http://gis-lab.info/qa/road-graph-eng.html</a>" );
}
link->setOpenExternalLinks( true );
lines->addWidget( link );
QPushButton *btnClose = new QPushButton( tr( "Close" ) );
lines->addWidget( btnClose );
QObject::connect( btnClose, SIGNAL( clicked() ), &dlg, SLOT( close() ) );
dlg.exec();
} //RoadGraphPlugin::about()
void RoadGraphPlugin::projectRead()
{
mSettings->read( QgsProject::instance() );
mTimeUnitName = QgsProject::instance()->readEntry( "roadgraphplugin", "/pluginTimeUnit", "h" );
mDistanceUnitName = QgsProject::instance()->readEntry( "roadgraphplugin", "/pluginDistanceUnit", "km" );
setGuiElementsToDefault();
}// RoadGraphplguin::projectRead()
QgisInterface* RoadGraphPlugin::iface()
{
return mQGisIface;
}
const RgGraphDirector* RoadGraphPlugin::director() const
{
QString layerId;
QgsVectorLayer *layer = NULL;
QMap< QString, QgsMapLayer* > mapLayers = QgsMapLayerRegistry::instance()->mapLayers();
QMap< QString, QgsMapLayer* >::const_iterator it;
for ( it = mapLayers.begin(); it != mapLayers.end(); ++it )
{
if ( it.value()->name() != mSettings->mLayer )
continue;
layerId = it.key();
layer = dynamic_cast< QgsVectorLayer* >( it.value() );
break;
}
if ( layer == NULL )
return NULL;
QgsVectorDataProvider *provider = dynamic_cast< QgsVectorDataProvider* > ( layer->dataProvider() );
if ( provider == NULL )
return NULL;
RgLineVectorLayerDirector * director =
new RgLineVectorLayerDirector( layerId,
provider->fieldNameIndex( mSettings->mDirection ),
mSettings->mFirstPointToLastPointDirectionVal,
mSettings->mLastPointToFirstPointDirectionVal,
mSettings->mBothDirectionVal,
mSettings->mDefaultDirection,
mSettings->mSpeedUnitName,
provider->fieldNameIndex( mSettings->mSpeed ),
mSettings->mDefaultSpeed );
return director;
}
void RoadGraphPlugin::render( QPainter *painter )
{
if ( !mQShowDirectionAction->isChecked() )
return;
const RgGraphDirector *graphDirector = director();
if ( graphDirector == NULL )
return;
RgSimpleGraphBuilder builder;
builder.setDestinationCrs( mQGisIface->mapCanvas()->mapRenderer()->destinationSrs() );
graphDirector->makeGraph( &builder );
AdjacencyMatrix m = builder.adjacencyMatrix();
AdjacencyMatrix::iterator it1;
AdjacencyMatrixString::iterator it2;
for ( it1 = m.begin(); it1 != m.end(); ++it1 )
{
for ( it2 = it1->second.begin(); it2 != it1->second.end(); ++it2 )
{
QgsPoint p1 = mQGisIface->mapCanvas()->getCoordinateTransform()->transform( it1->first );
QgsPoint p2 = mQGisIface->mapCanvas()->getCoordinateTransform()->transform( it2->first );
double x1 = p1.x(),
y1 = p1.y(),
x2 = p2.x(),
y2 = p2.y();
double length = sqrt( pow( x2 - x1, 2.0 ) + pow( y2 - y1, 2.0 ) );
double Cos = ( x2 - x1 ) / length;
double Sin = ( y2 - y1 ) / length;
double centerX = ( x1 + x2 ) / 2;
double centerY = ( y1 + y2 ) / 2;
double r = mArrowSize;
QPointF pt1( centerX - Sin*r, centerY + Cos*r );
QPointF pt2( centerX + Sin*r, centerY - Cos*r );
QVector<QPointF> tmp;
tmp.resize( 3 );
tmp[0] = QPointF( centerX + Cos * r * 2, centerY + Sin * r * 2 );
tmp[1] = pt1;
tmp[2] = pt2;
painter->drawPolygon( tmp );
}
}
delete graphDirector;
}// RoadGraphPlugin::render()
QString RoadGraphPlugin::timeUnitName()
{
return mTimeUnitName;
}
QString RoadGraphPlugin::distanceUnitName()
{
return mDistanceUnitName;
}
//////////////////////////////////////////////////////////////////////////
//
//
// THE FOLLOWING CODE IS AUTOGENERATED BY THE PLUGIN BUILDER SCRIPT
// YOU WOULD NORMALLY NOT NEED TO MODIFY THIS, AND YOUR PLUGIN
// MAY NOT WORK PROPERLY IF YOU MODIFY THIS INCORRECTLY
//
//
//////////////////////////////////////////////////////////////////////////
/**
* 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
QGISEXTERN QgisPlugin * classFactory( QgisInterface * theQgisInterfacePointer )
{
return new RoadGraphPlugin( 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.
QGISEXTERN QString name()
{
return sName;
}
// Return the description
QGISEXTERN QString description()
{
return sDescription;
}
// Return the type (either UI or MapLayer plugin)
QGISEXTERN int type()
{
return sPluginType;
}
// Return the version number for the plugin
QGISEXTERN QString version()
{
return sPluginVersion;
}
// Delete ourself
QGISEXTERN void unload( QgisPlugin * thePluginPointer )
{
delete thePluginPointer;
}