Add new custom widgets (QgsSlider and QgsDial)

Modified versions of QSlider and QDial which show the current value

Fix #4417

src/gui/CMakeLists.txt

@@ -86,6 +86,7 @@ qgsdetaileditemdata.cpp
 qgsdatumtransformdialog.cpp
 qgsdetaileditemdelegate.cpp
 qgsdetaileditemwidget.cpp
+qgsdial.cpp
 qgsdialog.cpp
 qgsencodingfiledialog.cpp
 qgserrordialog.cpp
@@ -148,6 +149,7 @@ qgsscalecombobox.cpp
 qgsscalerangewidget.cpp
 qgsscalevisibilitydialog.cpp
 qgssearchquerybuilder.cpp
+qgsslider.cpp
 qgssublayersdialog.cpp
 qgssvgannotationitem.cpp
 qgstextannotationitem.cpp
@@ -243,6 +245,7 @@ qgsdatadefinedbutton.h
 qgsdatumtransformdialog.h
 qgsdetaileditemdelegate.h
 qgsdetaileditemwidget.h
+qgsdial.h
 qgsdialog.h
 qgsencodingfiledialog.h
 qgserrordialog.h
@@ -295,6 +298,7 @@ qgsscalecombobox.h
 qgsscalerangewidget.h
 qgsscalevisibilitydialog.h
 qgssearchquerybuilder.h
+qgsslider.h
 qgssublayersdialog.h
 qgsunitselectionwidget.h
 )
@@ -322,6 +326,7 @@ qgscolordialog.h
 qgscredentialdialog.h
 qgscursors.h
 qgsdatadefinedbutton.h
+qgsdial.h
 qgsencodingfiledialog.h
 qgsexpressionbuilderdialog.h
 qgsexpressionbuilderwidget.h
@@ -363,6 +368,7 @@ qgsscalecombobox.h
 qgsscalerangewidget.h
 qgsscalevisibilitydialog.h
 qgssearchquerybuilder.h
+qgsslider.h
 qgssublayersdialog.h
 qgsvectorlayertools.h
 qgsvertexmarker.h

src/gui/qgsdial.cpp

@@ -0,0 +1,19 @@
+#include "qgsdial.h"
+
+#include <QRect>
+
+QgsDial::QgsDial( QWidget *parent ) : QDial( parent )
+{
+  setMinimumSize( QSize(50, 50) );
+}
+
+void QgsDial::paintEvent( QPaintEvent *event )
+{
+  QDial::paintEvent( event );
+  QPainter painter( this );
+  QRect rect = geometry();
+  painter.setPen( QPen( palette().color( QPalette::WindowText ) ) );
+  painter.drawText( QRectF( 0, rect.height() * 0.65, rect.width(), rect.height() ),
+                    Qt::AlignHCenter, QString::number( value() ), 0 );
+  painter.end();
+}

src/gui/qgsdial.h

@@ -0,0 +1,13 @@
+#include <QDial>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QSize>
+
+class QgsDial : public QDial
+{
+  Q_OBJECT
+public:
+  QgsDial( QWidget *parent = 0 );
+protected:
+  virtual void paintEvent( QPaintEvent * event );
+};

src/gui/qgsslider.cpp

@@ -0,0 +1,24 @@
+#include "qgsslider.h"
+
+#include <QRect>
+
+QgsSlider::QgsSlider ( QWidget * parent ) : QSlider ( parent )
+{
+  setMinimumSize( QSize(100, 40) );
+}
+
+QgsSlider::QgsSlider( Qt::Orientation orientation, QWidget * parent) : QSlider( orientation, parent )
+{
+  setMinimumSize( QSize(100, 40) );
+}
+
+void QgsSlider::paintEvent( QPaintEvent *event )
+{
+  QSlider::paintEvent( event );
+  QPainter painter( this );
+  QRect rect = geometry();
+  painter.setPen( QPen( palette().color( QPalette::WindowText ) ) );
+  painter.drawText( QRectF( 0, rect.height() * 0.5, rect.width(), rect.height() ),
+                    Qt::AlignHCenter, QString::number( value() ), 0 );
+  painter.end();
+}

src/gui/qgsslider.h

@@ -0,0 +1,14 @@
+#include <QPainter>
+#include <QPaintEvent>
+#include <QSize>
+#include <QSlider>
+
+class QgsSlider : public QSlider
+{
+  Q_OBJECT
+public:
+  QgsSlider( QWidget *parent = 0 );
+  QgsSlider( Qt::Orientation orientation, QWidget * parent = 0 );
+protected:
+  virtual void paintEvent( QPaintEvent * event );
+};