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Added option to save histogram and also refactored dialog filetype li…
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…st for saving images into qgisgui

git-svn-id: http://svn.osgeo.org/qgis/trunk@14328 c8812cc2-4d05-0410-92ff-de0c093fc19c
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timlinux committed Oct 4, 2010
1 parent 79241a8 commit 4613f71
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Showing 6 changed files with 182 additions and 114 deletions.
100 changes: 4 additions & 96 deletions src/app/qgisapp.cpp
View file
Expand Up @@ -2593,20 +2593,6 @@ void QgisApp::about()



/**
Convenience function for readily creating file filters.
Given a long name for a file filter and a regular expression, return
a file filter string suitable for use in a QFileDialog::OpenFiles()
call. The regular express, glob, will have both all lower and upper
case versions added.
*/
static QString createFileFilter_( QString const &longName, QString const &glob )
{
return longName + " (" + glob.toLower() + " " + glob.toUpper() + ")";
} // createFileFilter_



Expand Down Expand Up @@ -3558,94 +3544,16 @@ void QgisApp::showComposerManager()

void QgisApp::saveMapAsImage()
{
//create a map to hold the QImageIO names and the filter names
//the QImageIO name must be passed to the mapcanvas saveas image function
typedef QMap<QString, QString> FilterMap;
FilterMap myFilterMap;

//find out the last used filter
QSettings myQSettings; // where we keep last used filter in persistent state
QString myLastUsedFilter = myQSettings.value( "/UI/lastSaveAsImageFilter" ).toString();
QString myLastUsedDir = myQSettings.value( "/UI/lastSaveAsImageDir", "." ).toString();

// get a list of supported output image types
int myCounterInt = 0;
QString myFilters;
QList<QByteArray> formats = QImageWriter::supportedImageFormats();

for ( ; myCounterInt < formats.count(); myCounterInt++ )
{
QString myFormat = QString( formats.at( myCounterInt ) );
//svg doesnt work so skip it
if ( myFormat == "svg" )
continue;

QString myFilter = createFileFilter_( myFormat + " format", "*." + myFormat );
if ( !myFilters.isEmpty() )
myFilters += ";;";
myFilters += myFilter;
myFilterMap[myFilter] = myFormat;
}
#ifdef QGISDEBUG
QgsDebugMsg( "Available Filters Map: " );
FilterMap::Iterator myIterator;
for ( myIterator = myFilterMap.begin(); myIterator != myFilterMap.end(); ++myIterator )
{
QgsDebugMsg( myIterator.key() + " : " + myIterator.value() );
}
#endif

//create a file dialog using the the filter list generated above
std::auto_ptr < QFileDialog > myQFileDialog( new QFileDialog( this,
tr( "Choose a file name to save the map image as" ),
myLastUsedDir, myFilters ) );

// allow for selection of more than one file
myQFileDialog->setFileMode( QFileDialog::AnyFile );

myQFileDialog->setAcceptMode( QFileDialog::AcceptSave );

myQFileDialog->setConfirmOverwrite( true );


if ( !myLastUsedFilter.isEmpty() ) // set the filter to the last one used
{
myQFileDialog->selectFilter( myLastUsedFilter );
}


//prompt the user for a fileName
QString myOutputFileNameQString; // = myQFileDialog->getSaveFileName(); //delete this
if ( myQFileDialog->exec() == QDialog::Accepted )
QPair< QString,QString> myFileNameAndFilter = QgisGui::getSaveAsImageName( this, tr( "Choose a file name to save the map image as" ) );
if ( myFileNameAndFilter.first != "" )
{
myOutputFileNameQString = myQFileDialog->selectedFiles().first();
}

QString myFilterString = myQFileDialog->selectedFilter();
QgsDebugMsg( "Selected filter: " + myFilterString );
QgsDebugMsg( "Image type to be passed to mapcanvas: " + myFilterMap[myFilterString] );

// Add the file type suffix to the fileName if required
if ( !myOutputFileNameQString.endsWith( myFilterMap[myFilterString] ) )
{
myOutputFileNameQString += "." + myFilterMap[myFilterString];
}

myQSettings.setValue( "/UI/lastSaveAsImageFilter", myFilterString );
myQSettings.setValue( "/UI/lastSaveAsImageDir", myQFileDialog->directory().absolutePath() );

if ( myOutputFileNameQString != "" )
{

//save the mapview to the selected file
mMapCanvas->saveAsImage( myOutputFileNameQString, NULL, myFilterMap[myFilterString] );
statusBar()->showMessage( tr( "Saved map image to %1" ).arg( myOutputFileNameQString ) );
mMapCanvas->saveAsImage( myFileNameAndFilter.first, NULL, myFileNameAndFilter.second );
statusBar()->showMessage( tr( "Saved map image to %1" ).arg( myFileNameAndFilter.first ) );
}

} // saveMapAsImage



//overloaded version of the above function
void QgisApp::saveMapAsImage( QString theImageFileNameQString, QPixmap * theQPixmap )
{
Expand Down
61 changes: 45 additions & 16 deletions src/app/qgsrasterlayerproperties.cpp
View file
Expand Up @@ -66,7 +66,8 @@ QgsRasterLayerProperties::QgsRasterLayerProperties( QgsMapLayer* lyr, QgsMapCanv
: QDialog( parent, fl ),
// Constant that signals property not used.
TRSTRING_NOT_SET( tr( "Not Set" ) ),
mRasterLayer( qobject_cast<QgsRasterLayer *>( lyr ) )
mRasterLayer( qobject_cast<QgsRasterLayer *>( lyr ) ),
mpPlot( 0 )
{
ignoreSpinBoxEvent = false; //Short circuit signal loop between min max field and stdDev spin box
mGrayMinimumMaximumEstimated = true;
Expand Down Expand Up @@ -204,6 +205,8 @@ QgsRasterLayerProperties::QgsRasterLayerProperties( QgsMapLayer* lyr, QgsMapCanv
pbtnExportColorMapToFile->setIcon( QgisApp::getThemeIcon( "/mActionFileSave.png" ) );
pbtnLoadColorMapFromFile->setIcon( QgisApp::getThemeIcon( "/mActionFileOpen.png" ) );

mSaveAsImageButton->setIcon( QgisApp::getThemeIcon( "/mActionFileSave.png" ) );

mMapCanvas = theCanvas;
mPixelSelectorTool = 0;
if ( mMapCanvas )
Expand Down Expand Up @@ -1849,29 +1852,31 @@ void QgsRasterLayerProperties::on_tabBar_currentChanged( int theTab )

void QgsRasterLayerProperties::refreshHistogram()
{
if ( mpPlot != 0 )
{
delete mpPlot;
}
mHistogramProgress->show();
connect( mRasterLayer, SIGNAL( progressUpdate( int ) ), mHistogramProgress, SLOT( setValue( int ) ) );
QApplication::setOverrideCursor( Qt::WaitCursor );
QgsDebugMsg( "entered." );

QwtPlot * mypPlot = new QwtPlot( mChartWidget );
mypPlot->canvas()->setCursor( Qt::ArrowCursor );
mpPlot = new QwtPlot( mChartWidget );
//ensure all children get removed
mypPlot->setAutoDelete( true );
mpPlot->setAutoDelete( true );
QVBoxLayout *mpHistogramLayout = new QVBoxLayout( mChartWidget );
mpHistogramLayout->setContentsMargins( 0, 0, 0, 0 );
mpHistogramLayout->addWidget( mypPlot );
mpHistogramLayout->addWidget( mpPlot );
mChartWidget->setLayout( mpHistogramLayout );
mypPlot->setTitle( QObject::tr( "Raster Histogram" ) );
mypPlot->insertLegend( new QwtLegend(), QwtPlot::BottomLegend );
mpPlot->setTitle( QObject::tr( "Raster Histogram") );
mpPlot->insertLegend( new QwtLegend(), QwtPlot::BottomLegend );
// Set axis titles
mypPlot->setAxisTitle( QwtPlot::xBottom, QObject::tr( "Pixel Value" ) );
mypPlot->setAxisTitle( QwtPlot::yLeft, QObject::tr( "Frequency" ) );
mypPlot->setAxisAutoScale( QwtPlot::xBottom );
mypPlot->setAxisAutoScale( QwtPlot::yLeft );
mpPlot->setAxisTitle( QwtPlot::xBottom, QObject::tr("Pixel Value") );
mpPlot->setAxisTitle( QwtPlot::yLeft, QObject::tr("Frequency") );
mpPlot->setAxisAutoScale( QwtPlot::xBottom );
mpPlot->setAxisAutoScale( QwtPlot::yLeft );
// add a grid
QwtPlotGrid * myGrid = new QwtPlotGrid();
myGrid->attach( mypPlot );
myGrid->attach(mpPlot);
// Explanation:
// We use the gdal histogram creation routine is called for each selected
// layer. Currently the hist is hardcoded
Expand Down Expand Up @@ -1917,15 +1922,39 @@ void QgsRasterLayerProperties::refreshHistogram()
myX2Data.append( double( myBin ) );
myY2Data.append( double( myBinValue ) );
}
mypCurve->setData( myX2Data, myY2Data );
mypCurve->attach( mypPlot );
mypCurve->setData(myX2Data,myY2Data);
mypCurve->attach(mpPlot);
}
mypPlot->replot();
mpPlot->replot();
disconnect( mRasterLayer, SIGNAL( progressUpdate( int ) ), mHistogramProgress, SLOT( setValue( int ) ) );
mHistogramProgress->hide();
mpPlot->canvas()->setCursor(Qt::ArrowCursor);
QApplication::restoreOverrideCursor();
}

void QgsRasterLayerProperties::on_mSaveAsImageButton_clicked()
{
if ( mpPlot == 0 )
{
return;
}

QPixmap myPixmap(600, 600);
myPixmap.fill(Qt::white); // Qt::transparent ?

QwtPlotPrintFilter myFilter;
int myOptions = QwtPlotPrintFilter::PrintAll;
myOptions &= ~QwtPlotPrintFilter::PrintBackground;
myOptions |= QwtPlotPrintFilter::PrintFrameWithScales;
myFilter.setOptions(myOptions);

mpPlot->print(myPixmap, myFilter);
QPair< QString,QString> myFileNameAndFilter = QgisGui::getSaveAsImageName( this, tr( "Choose a file name to save the map image as" ) );
if ( myFileNameAndFilter.first != "" )
{
myPixmap.save( myFileNameAndFilter.first );
}
}
void QgsRasterLayerProperties::on_pbnImportTransparentPixelValues_clicked()
{
int myLineCounter = 0;
Expand Down
5 changes: 4 additions & 1 deletion src/app/qgsrasterlayerproperties.h
View file
Expand Up @@ -31,7 +31,7 @@ class QgsMapLayer;
class QgsMapCanvas;
class QgsRasterLayer;
class QgsPixelSelectorTool;

class QwtPlot;

/**Property sheet for a raster map layer
*@author Tim Sutton
Expand Down Expand Up @@ -144,6 +144,8 @@ class QgsRasterLayerProperties : public QDialog, private Ui::QgsRasterLayerPrope
void on_pbnSaveStyleAs_clicked();
/** Help button */
void on_buttonBox_helpRequested() { QgsContextHelp::run( metaObject()->className() ); }
/** This slot lets you save the histogram as an image to disk */
void on_mSaveAsImageButton_clicked();

signals:

Expand Down Expand Up @@ -219,6 +221,7 @@ class QgsRasterLayerProperties : public QDialog, private Ui::QgsRasterLayerPrope

QgsMapCanvas* mMapCanvas;
QgsPixelSelectorTool* mPixelSelectorTool;
QwtPlot * mpPlot;
};

/**
Expand Down
92 changes: 91 additions & 1 deletion src/gui/qgisgui.cpp
View file
Expand Up @@ -15,8 +15,12 @@
#include "qgisgui.h"

#include <QSettings>
#include <QObject> //for tr
#include <QImageWriter>
#include "qgsencodingfiledialog.h"
#include "qgslogger.h"
#include <memory> //for auto_ptr


namespace QgisGui
{
Expand All @@ -34,7 +38,7 @@ namespace QgisGui

haveLastUsedFilter = settings.contains( "/UI/" + filterName );
QString lastUsedFilter = settings.value( "/UI/" + filterName,
QVariant( QString::null ) ).toString();
QVariant( QString::null ) ).toString();

QString lastUsedDir = settings.value( "/UI/" + filterName + "Dir", "." ).toString();

Expand Down Expand Up @@ -84,5 +88,91 @@ namespace QgisGui
return false;
}

QPair<QString, QString> GUI_EXPORT getSaveAsImageName( QWidget * theParent, QString theMessage )
{
//create a map to hold the QImageIO names and the filter names
//the QImageIO name must be passed to the mapcanvas saveas image function
typedef QMap<QString, QString> FilterMap;
FilterMap myFilterMap;

//find out the last used filter
QSettings myQSettings; // where we keep last used filter in persistent state
QString myLastUsedFilter = myQSettings.value( "/UI/lastSaveAsImageFilter" ).toString();
QString myLastUsedDir = myQSettings.value( "/UI/lastSaveAsImageDir", "." ).toString();

// get a list of supported output image types
int myCounterInt = 0;
QString myFilters;
QList<QByteArray> formats = QImageWriter::supportedImageFormats();

for ( ; myCounterInt < formats.count(); myCounterInt++ )
{
QString myFormat = QString( formats.at( myCounterInt ) );
//svg doesnt work so skip it
if ( myFormat == "svg" )
continue;

QString myFilter = createFileFilter_( myFormat + " format", "*." + myFormat );
if ( !myFilters.isEmpty() )
myFilters += ";;";
myFilters += myFilter;
myFilterMap[myFilter] = myFormat;
}
#ifdef QGISDEBUG
QgsDebugMsg( "Available Filters Map: " );
FilterMap::Iterator myIterator;
for ( myIterator = myFilterMap.begin(); myIterator != myFilterMap.end(); ++myIterator )
{
QgsDebugMsg( myIterator.key() + " : " + myIterator.value() );
}
#endif

//create a file dialog using the the filter list generated above
std::auto_ptr < QFileDialog > myQFileDialog( new QFileDialog( theParent,
QObject::tr( "Choose a file name to save the map image as" ),
myLastUsedDir, myFilters ) );

// allow for selection of more than one file
myQFileDialog->setFileMode( QFileDialog::AnyFile );

myQFileDialog->setAcceptMode( QFileDialog::AcceptSave );

myQFileDialog->setConfirmOverwrite( true );


if ( !myLastUsedFilter.isEmpty() ) // set the filter to the last one used
{
myQFileDialog->selectFilter( myLastUsedFilter );
}

//prompt the user for a fileName
QString myOutputFileName; // = myQFileDialog->getSaveFileName(); //delete this
if ( myQFileDialog->exec() == QDialog::Accepted )
{
myOutputFileName = myQFileDialog->selectedFiles().first();
}

QString myFilterString = myQFileDialog->selectedFilter();
QgsDebugMsg( "Selected filter: " + myFilterString );
QgsDebugMsg( "Image type: " + myFilterMap[myFilterString] );

// Add the file type suffix to the fileName if required
if ( !myOutputFileName.endsWith( myFilterMap[myFilterString] ) )
{
myOutputFileName += "." + myFilterMap[myFilterString];
}

myQSettings.setValue( "/UI/lastSaveAsImageFilter", myFilterString );
myQSettings.setValue( "/UI/lastSaveAsImageDir", myQFileDialog->directory().absolutePath() );
QPair <QString, QString> myPair;
myPair.first = myOutputFileName;
myPair.second = myFilterMap[myFilterString];
return myPair;
} //

static QString createFileFilter_( QString const &longName, QString const &glob )
{
return longName + " (" + glob.toLower() + " " + glob.toUpper() + ")";
} // createFileFilter_

} // end of QgisGui namespace

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