sharpetronics/QGIS
1
0
Fork 0
mirror of https://github.com/qgis/QGIS.git synced 2025-02-28 00:17:30 -05:00
Code Issues Packages Projects Releases Wiki Activity

Update layer transparency after 100ms delay

Browse Source
This commit is contained in:
Martin Dobias 2016-06-03 10:26:01 +02:00
parent 301fd985af
commit 19f83ae28d
2 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/gui/layertree/qgslayertreeembeddedwidgetsimpl.cpp
View File

@ -15,9 +15,11 @@
#include "qgslayertreeembeddedwidgetsimpl.h"
#include <QHBoxLayout>
#include <QLabel>
#include <QSlider>
#include <QHBoxLayout>
#include <QTimer>
#include "qgsrasterlayer.h"
#include "qgsrasterrenderer.h"
#include "qgsvectorlayer.h"
@ -37,6 +39,12 @@ QgsLayerTreeTransparencyWidget::QgsLayerTreeTransparencyWidget( QgsMapLayer* lay
lay->addWidget( mSlider );
setLayout( lay );
// timer for delayed transparency update - for more responsive GUI
mTimer = new QTimer( this );
mTimer->setSingleShot( true );
mTimer->setInterval( 100 );
connect( mTimer, SIGNAL( timeout() ), this, SLOT( updateTransparencyFromSlider() ) );
connect( mSlider, SIGNAL( valueChanged( int ) ), this, SLOT( sliderValueChanged( int ) ) );
// init from layer
@ -60,6 +68,17 @@ QSize QgsLayerTreeTransparencyWidget::sizeHint() const
void QgsLayerTreeTransparencyWidget::sliderValueChanged( int value )
{
Q_UNUSED( value );
if ( mTimer->isActive() )
return;
mTimer->start();
}
void QgsLayerTreeTransparencyWidget::updateTransparencyFromSlider()
{
int value = mSlider->value();
if ( mLayer->type() == QgsMapLayer::VectorLayer )
{
qobject_cast<QgsVectorLayer*>( mLayer )->setLayerTransparency( value );

3
src/gui/layertree/qgslayertreeembeddedwidgetsimpl.h
View File

@ -21,6 +21,7 @@
class QSlider;
class QTimer;
class QgsMapLayer;
/**
@ -47,11 +48,13 @@ class QgsLayerTreeTransparencyWidget : public QWidget
public slots:
void sliderValueChanged( int value );
void updateTransparencyFromSlider();
void layerTrChanged();
private:
QgsMapLayer* mLayer;
QSlider* mSlider;
QTimer* mTimer;
};
#endif // QGSLAYERTREEEMBEDDEDWIDGETSIMPL_H