implement collapsible groupbox items - needs feedback before implemen…

…ting as a widget in qgis_gui

src/gui/qgsrasterlayersaveasdialog.cpp

@@ -9,6 +9,109 @@
 #include <QFileDialog>
 #include <QSettings>
 
+
+// this widget class will go into its separate file
+
+// #include <QMouseEvent>
+// #include <QStyleOptionGroupBox>
+// #include <QStylePainter>
+
+GroupBox::GroupBox( QWidget *parent )
+  : QGroupBox( parent ), m_collapsed( false ) 
+{
+  connect( this, SIGNAL( toggled ( bool ) ), this, SLOT( setToggled( bool ) ) );
+  //setToggled( isChecked() );
+}
+
+GroupBox::GroupBox( const QString &title, QWidget *parent )
+  : QGroupBox(title, parent ), m_collapsed( false ) 
+{}
+
+bool GroupBox::isCollapsed() { return m_collapsed; }
+
+// void GroupBox::mousePressEvent( QMouseEvent *e )
+// {
+//   QgsDebugMsg("press event");
+// 	if( e->button() == Qt::LeftButton )
+// 	{
+//   QgsDebugMsg("left but");
+// 		QStyleOptionGroupBox option;
+// 		initStyleOption( &option );
+// 		QRect buttonArea( 0, 0, 16, 16 );
+// 		buttonArea.moveTopRight( option.rect.adjusted( 0, 0, -10, 0 
+// ).topRight() );
+// 		if( buttonArea.contains( e->pos() ) )
+// 		{
+// 			clickPos = e->pos();
+// 			return;
+// 		}
+// 	}
+// 	QGroupBox::mousePressEvent( e );
+// }
+
+// void GroupBox::mouseReleaseEvent( QMouseEvent *e )
+// {
+//   QgsDebugMsg("release");
+// 	if( e->button() == Qt::LeftButton && clickPos == e->pos() )
+// 		setCollapse( !isCollapsed() );
+// }
+
+// void GroupBox::paintEvent( QPaintEvent * )
+// {
+//   QgsDebugMsg("paint event");
+
+//      QStylePainter paint( this );
+// 	QStyleOptionGroupBox option;
+// 	initStyleOption( &option );
+// 	paint.drawComplexControl( QStyle::CC_GroupBox, option );
+// 	paint.drawItemPixmap(
+// 		option.rect.adjusted( 0, 0, -10, 0 ),
+// 		Qt::AlignTop | Qt::AlignRight,
+// 		QPixmap( m_collapsed ?
+// 			":/images/images/navigate_down2_16x16.png" :
+// 			":/images/images/navigate_up2_16x16.png" ) );
+// }
+
+void GroupBox::showEvent( QShowEvent * event )
+{
+  // QgsDebugMsg(QString("%1 showEvent %2 %3").arg(objectName()).arg(isChecked()).arg(isCollapsed()));
+  QGroupBox::showEvent( event );
+  if ( ! isChecked() && ! isCollapsed() )
+    setCollapsed( true );
+}
+
+void GroupBox::setCollapsed( bool collapse )
+{
+  if ( ! isVisible() )
+    return;
+  // QgsDebugMsg(QString("%1 setcollapse %2").arg(objectName()).arg(collapse));
+
+  // minimize layout margins, restore later 
+  if ( collapse )
+  {
+    if ( layout() )
+    {      
+      margins = layout()->contentsMargins();
+      layout()->setContentsMargins(1,1,1,1);
+    }
+  }
+  else
+  {
+    if ( layout() )
+    {
+      layout()->setContentsMargins( margins );
+    }
+  }
+  m_collapsed = collapse;
+  foreach( QWidget *widget, findChildren<QWidget*>() )
+    widget->setHidden( collapse );
+
+  if ( m_collapsed )
+    emit collapsed( this );
+  else
+    emit expanded( this );
+}
+
 QgsRasterLayerSaveAsDialog::QgsRasterLayerSaveAsDialog( QgsRasterDataProvider* sourceProvider, const QgsRectangle& currentExtent,
     const QgsCoordinateReferenceSystem& layerCrs,
     const QgsCoordinateReferenceSystem& currentCrs,
@@ -26,7 +129,7 @@ QgsRasterLayerSaveAsDialog::QgsRasterLayerSaveAsDialog( QgsRasterDataProvider* s
   mLoadTransparentNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionCopySelected.png" ) );
   mRemoveSelectedNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionDeleteAttribute.png" ) );
   mRemoveAllNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionRemove.png" ) );
-  mNoDataGroupBox->setEnabled( false ); // not yet implemented
+  // mNoDataGroupBox->setEnabled( false ); // not yet implemented
 
   setValidators();
   // Translated labels + EPSG are updated later
@@ -81,6 +184,12 @@ QgsRasterLayerSaveAsDialog::QgsRasterLayerSaveAsDialog( QgsRasterDataProvider* s
   {
     okButton->setEnabled( false );
   }
+
+  // this should scroll down to make widget visible, but it's not happening
+  // (at least part of it is visible)...
+  connect( mCreateOptionsGroupBox, SIGNAL( expanded( QWidget* ) ), 
+           this, SLOT( groupBoxExpanded( QWidget* ) ) );
+
 }
 
 void QgsRasterLayerSaveAsDialog::setValidators()

src/gui/qgsrasterlayersaveasdialog.h

@@ -79,6 +79,8 @@ class GUI_EXPORT QgsRasterLayerSaveAsDialog: public QDialog, private Ui::QgsRast
 
     void on_mCrsComboBox_currentIndexChanged( int ) { crsChanged(); }
 
+    void groupBoxExpanded( QWidget * widget ) { mScrollArea->ensureWidgetVisible( widget ); }
+
   private:
     QgsRasterDataProvider* mDataProvider;
     QgsRectangle mCurrentExtent;
@@ -105,4 +107,44 @@ class GUI_EXPORT QgsRasterLayerSaveAsDialog: public QDialog, private Ui::QgsRast
     void updateCrsGroup();
 };
 
+
 #endif // QGSRASTERLAYERSAVEASDIALOG_H
+
+
+// this widget class will go into its separate file
+#ifndef GROUPBOX_H
+#define GROUPBOX_H
+
+#include <QGroupBox>
+
+class GroupBox : public QGroupBox
+{
+	Q_OBJECT
+
+public:
+	GroupBox( QWidget *parent = 0 );
+	GroupBox( const QString &title, QWidget *parent = 0 );
+
+	bool isCollapsed();
+
+ signals:
+    void collapsed( QWidget* );
+    void expanded( QWidget* );
+
+public slots: 
+	void setToggled( bool toggled ) { setCollapsed( ! toggled ); }
+	void setCollapsed( bool collapsed );
+
+protected:
+	/* void mousePressEvent( QMouseEvent *e ); */
+	/* void mouseReleaseEvent( QMouseEvent *e ); */
+	/* void paintEvent( QPaintEvent * ); */
+    void showEvent( QShowEvent * event );
+
+private:
+	QPoint	clickPos;
+	bool	m_collapsed;
+    QMargins margins;
+};
+
+#endif