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update histogram UI and options (#7619)

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etiennesky committed May 6, 2013
1 parent ca43d8d commit cf9a1b51f9ff4205f72ba9b9cd2a2087ac30ca9f
@@ -25,6 +25,7 @@
#include <QFileInfo>
#include <QDir>
#include <QPainter>
#include <QSettings>

// QWT Charting widget
#include <qwt_global.h>
@@ -55,13 +56,22 @@ QgsRasterHistogramWidget::QgsRasterHistogramWidget( QgsRasterLayer* lyr, QWidget
mRendererWidget = 0;
mRendererName = "singlebandgray";

mHistoMin = 0;
mHistoMax = 0;

mHistoPicker = NULL;
mHistoZoomer = NULL;
mHistoMarkerMin = NULL;
mHistoMarkerMax = NULL;
mHistoShowMarkers = false;
mHistoLoadApplyAll = false;

QSettings settings;
mHistoShowMarkers = settings.value( "/Raster/histogram/showMarkers", false ).toBool();
// mHistoLoadApplyAll = settings.value( "/Raster/histogram/loadApplyAll", false ).toBool();
mHistoZoomToMinMax = settings.value( "/Raster/histogram/zoomToMinMax", false ).toBool();
mHistoUpdateStyleToMinMax = settings.value( "/Raster/histogram/updateStyleToMinMax", true ).toBool();
// mHistoShowBands = (HistoShowBands) settings.value( "/Raster/histogram/showBands", (int) ShowAll ).toInt();
mHistoShowBands = ShowAll;

if ( true )
{
//band selector
@@ -91,18 +101,36 @@ QgsRasterHistogramWidget::QgsRasterHistogramWidget( QgsRasterLayer* lyr, QWidget
QActionGroup* group;
QAction* action;

// various actions / prefs
// min/max options
group = new QActionGroup( this );
group->setExclusive( false );
connect( group, SIGNAL( triggered( QAction* ) ), this, SLOT( histoActionTriggered( QAction* ) ) );
action = new QAction( tr( "Visibility" ), group );
action = new QAction( tr( "Min/Max options" ), group );
action->setSeparator( true );
menu->addAction( action );
action = new QAction( tr( "Show min/max markers" ), group );
action = new QAction( tr( "Always show min/max markers" ), group );
action->setData( QVariant( "Show markers" ) );
action->setCheckable( true );
action->setChecked( mHistoShowMarkers );
menu->addAction( action );
action = new QAction( tr( "Zoom to min/max" ), group );
action->setData( QVariant( "Zoom min_max" ) );
action->setCheckable( true );
action->setChecked( mHistoZoomToMinMax );
menu->addAction( action );
action = new QAction( tr( "Update style to min/max" ), group );
action->setData( QVariant( "Update min_max" ) );
action->setCheckable( true );
action->setChecked( mHistoUpdateStyleToMinMax );
menu->addAction( action );

// visibility options
group = new QActionGroup( this );
group->setExclusive( false );
connect( group, SIGNAL( triggered( QAction* ) ), this, SLOT( histoActionTriggered( QAction* ) ) );
action = new QAction( tr( "Visibility" ), group );
action->setSeparator( true );
menu->addAction( action );
group = new QActionGroup( this );
group->setExclusive( true ); // these options are exclusive
connect( group, SIGNAL( triggered( QAction* ) ), this, SLOT( histoActionTriggered( QAction* ) ) );
@@ -122,6 +150,11 @@ QgsRasterHistogramWidget::QgsRasterHistogramWidget( QgsRasterLayer* lyr, QWidget
action->setChecked( mHistoShowBands == ShowSelected );
menu->addAction( action );

// actions
action = new QAction( tr( "Actions" ), group );
action->setSeparator( true );
menu->addAction( action );

// load actions
group = new QActionGroup( this );
group->setExclusive( false );
@@ -130,8 +163,9 @@ QgsRasterHistogramWidget::QgsRasterHistogramWidget( QgsRasterLayer* lyr, QWidget
action->setData( QVariant( "Load reset" ) );
menu->addAction( action );

// Load min/max needs 3 params (method, extent, accuracy), cannot put it in single item
// these actions have been disabled for api cleanup, restore them eventually
#if 0
// Load min/max needs 3 params (method, extent, accuracy), cannot put it in single item
action = new QAction( tr( "Load min/max" ), group );
action->setSeparator( true );
menu->addAction( action );
@@ -158,7 +192,6 @@ QgsRasterHistogramWidget::QgsRasterHistogramWidget( QgsRasterLayer* lyr, QWidget
#endif

//others
menu->addSeparator( );
action = new QAction( tr( "Recompute Histogram" ), group );
action->setData( QVariant( "Compute histogram" ) );
menu->addAction( action );
@@ -611,19 +644,10 @@ void QgsRasterHistogramWidget::on_cboHistoBand_currentIndexChanged( int index )
btnHistoMin->setEnabled( true );
btnHistoMax->setEnabled( true );

int theBandNo = index + 1;
// TODO - there are 2 definitions of raster data type that should be unified
// QgsRasterDataProvider::DataType and QGis::DataType
// TODO - fix gdal provider: changes data type when nodata value is not found
// this prevents us from getting proper min and max values here
// minStr = QString::number( QgsContrastEnhancement::minimumValuePossible( ( QGis::DataType )
// mRasterLayer->dataProvider()->dataType( theBandNo ) ) );
// maxStr = QString::number( QgsContrastEnhancement::maximumValuePossible( ( QGis::DataType )
// mRasterLayer->dataProvider()->dataType( theBandNo ) ) );

QPair< QString, QString > myMinMax = rendererMinMax( theBandNo );
QPair< QString, QString > myMinMax = rendererMinMax( index + 1 );
leHistoMin->setText( myMinMax.first );
leHistoMax->setText( myMinMax.second );

applyHistoMin();
applyHistoMax();
}
@@ -647,41 +671,63 @@ void QgsRasterHistogramWidget::histoAction( const QString actionName, bool actio
if ( actionName == "Show markers" )
{
mHistoShowMarkers = actionFlag;
QSettings settings;
settings.setValue( "/Raster/histogram/showMarkers", mHistoShowMarkers );
updateHistoMarkers();
return;
}
else if ( actionName == "Zoom min_max" )
{
mHistoZoomToMinMax = actionFlag;
QSettings settings;
settings.setValue( "/Raster/histogram/zoomToMinMax", mHistoZoomToMinMax );
return;
}
else if ( actionName == "Update min_max" )
{
mHistoUpdateStyleToMinMax = actionFlag;
QSettings settings;
settings.setValue( "/Raster/histogram/updateStyleToMinMax", mHistoUpdateStyleToMinMax );
return;
}
else if ( actionName == "Show all" )
{
mHistoShowBands = ShowAll;
// settings.setValue( "/Raster/histogram/showBands", (int)mHistoShowBands );
refreshHistogram();
return;
}
else if ( actionName == "Show selected" )
{
mHistoShowBands = ShowSelected;
// settings.setValue( "/Raster/histogram/showBands", (int)mHistoShowBands );
refreshHistogram();
return;
}
else if ( actionName == "Show RGB" )
{
mHistoShowBands = ShowRGB;
// settings.setValue( "/Raster/histogram/showBands", (int)mHistoShowBands );
refreshHistogram();
return;
}
#if 0
else if ( actionName == "Load apply all" )
{
mHistoLoadApplyAll = actionFlag;
settings.setValue( "/Raster/histogram/loadApplyAll", mHistoLoadApplyAll );
return;
}
#endif
// Load actions
// TODO - separate calculations from rendererwidget so we can do them without
else if ( actionName.left( 5 ) == "Load " && mRendererWidget )
{
QVector<int> myBands;
bool ok = false;

#if 0
double minMaxValues[2];
#endif
bool ok = false;

// find which band(s) need updating (all or current)
if ( mHistoLoadApplyAll )
@@ -693,6 +739,8 @@ void QgsRasterHistogramWidget::histoAction( const QString actionName, bool actio
myBands << i;
}
}
#endif

// add current band to the end
myBands << cboHistoBand->currentIndex() + 1;

@@ -782,13 +830,26 @@ void QgsRasterHistogramWidget::applyHistoMin( )

int theBandNo = cboHistoBand->currentIndex() + 1;
QList< int > mySelectedBands = rendererSelectedBands();
QString min;
for ( int i = 0; i <= mySelectedBands.size(); i++ )
{
if ( theBandNo == mRendererWidget->selectedBand( i ) )
mRendererWidget->setMin( leHistoMin->text(), i );
{
min = leHistoMin->text();
if ( mHistoUpdateStyleToMinMax )
mRendererWidget->setMin( min, i );
}
}

updateHistoMarkers();

if ( ! min.isEmpty() && mHistoZoomToMinMax && mHistoZoomer )
{
QRectF rect = mHistoZoomer->zoomRect();
rect.setLeft( min.toDouble() );
mHistoZoomer->zoom( rect );
}

}

void QgsRasterHistogramWidget::applyHistoMax( )
@@ -798,13 +859,25 @@ void QgsRasterHistogramWidget::applyHistoMax( )

int theBandNo = cboHistoBand->currentIndex() + 1;
QList< int > mySelectedBands = rendererSelectedBands();
QString max;
for ( int i = 0; i <= mySelectedBands.size(); i++ )
{
if ( theBandNo == mRendererWidget->selectedBand( i ) )
mRendererWidget->setMax( leHistoMax->text(), i );
{
max = leHistoMax->text();
if ( mHistoUpdateStyleToMinMax )
mRendererWidget->setMax( max, i );
}
}

updateHistoMarkers();

if ( ! max.isEmpty() && mHistoZoomToMinMax && mHistoZoomer )
{
QRectF rect = mHistoZoomer->zoomRect();
rect.setRight( max.toDouble() );
mHistoZoomer->zoom( rect );
}
}

void QgsRasterHistogramWidget::on_btnHistoMin_toggled()
@@ -822,6 +895,7 @@ void QgsRasterHistogramWidget::on_btnHistoMin_toggled()
mHistoZoomer->setEnabled( ! btnHistoMax->isChecked() );
mHistoPicker->setEnabled( btnHistoMin->isChecked() );
}
updateHistoMarkers();
}

void QgsRasterHistogramWidget::on_btnHistoMax_toggled()
@@ -839,6 +913,7 @@ void QgsRasterHistogramWidget::on_btnHistoMax_toggled()
mHistoZoomer->setEnabled( ! btnHistoMax->isChecked() );
mHistoPicker->setEnabled( btnHistoMax->isChecked() );
}
updateHistoMarkers();
}

// local function used by histoPickerSelected(), to get a rounded picked value
@@ -891,7 +966,7 @@ void QgsRasterHistogramWidget::histoPickerSelected( const QPointF & pos )
applyHistoMin();
btnHistoMin->setChecked( false );
}
else if ( btnHistoMax->isChecked() )
else // if ( btnHistoMax->isChecked() )
{
leHistoMax->setText( findClosestTickVal( pos.x(), scale ) );
applyHistoMax();
@@ -919,8 +994,8 @@ void QgsRasterHistogramWidget::updateHistoMarkers( )
int theBandNo = cboHistoBand->currentIndex() + 1;
QList< int > mySelectedBands = histoSelectedBands();

if ( ! mHistoShowMarkers ||
( ! mySelectedBands.isEmpty() && ! mySelectedBands.contains( theBandNo ) ) )
if (( ! mHistoShowMarkers && ! btnHistoMin->isChecked() && ! btnHistoMax->isChecked() ) ||
( ! mySelectedBands.isEmpty() && ! mySelectedBands.contains( theBandNo ) ) )
{
mHistoMarkerMin->hide();
mHistoMarkerMax->hide();
@@ -1024,5 +1099,22 @@ QPair< QString, QString > QgsRasterHistogramWidget::rendererMinMax( int theBandN
}
}

// TODO - there are 2 definitions of raster data type that should be unified
// QgsRasterDataProvider::DataType and QGis::DataType
// TODO - fix gdal provider: changes data type when nodata value is not found
// this prevents us from getting proper min and max values here
// minStr = QString::number( QgsContrastEnhancement::minimumValuePossible( ( QGis::DataType )
// mRasterLayer->dataProvider()->dataType( theBandNo ) ) );
// maxStr = QString::number( QgsContrastEnhancement::maximumValuePossible( ( QGis::DataType )
// mRasterLayer->dataProvider()->dataType( theBandNo ) ) );

// if we get an empty result, fill with default value (histo min/max)
if ( myMinMax.first.isEmpty() )
myMinMax.first = QString::number( mHistoMin );
if ( myMinMax.second.isEmpty() )
myMinMax.second = QString::number( mHistoMax );

QgsDebugMsg( QString( "bandNo %1 got min/max [%2] [%3]" ).arg( theBandNo ).arg( myMinMax.first ).arg( myMinMax.second ) );

return myMinMax;
}
@@ -112,7 +112,9 @@ class GUI_EXPORT QgsRasterHistogramWidget : public QWidget, private Ui::QgsRaste
double mHistoMax;
QVector<QColor> mHistoColors;
bool mHistoShowMarkers;
bool mHistoLoadApplyAll;
bool mHistoZoomToMinMax;
bool mHistoUpdateStyleToMinMax;
/* bool mHistoLoadApplyAll; */
HistoShowBands mHistoShowBands;
/** \brief Returns a list of selected bands in the histogram widget- or empty if there is no selection restriction. */
QList< int > histoSelectedBands();
@@ -98,7 +98,7 @@
</sizepolicy>
</property>
<property name="text">
<string>Band</string>
<string>Set min/max style for</string>
</property>
</widget>
</item>

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