Add class QgsComposerRuler

src/gui/CMakeLists.txt

@@ -51,6 +51,7 @@ qgslegendinterface.cpp
 qgscharacterselectdialog.cpp
 qgscolorbutton.cpp
 qgscomposerview.cpp
+qgscomposerruler.cpp
 qgscursors.cpp
 qgsdetaileditemdelegate.cpp
 qgsdetaileditemwidget.cpp

src/gui/qgscomposerruler.cpp

@@ -0,0 +1,26 @@
+#include "qgscomposerruler.h"
+#include <QPainter>
+
+const int RULER_MIN_SIZE = 20;
+
+QgsComposerRuler::QgsComposerRuler( QgsComposerRuler::Direction d ): mDirection( d )
+{
+}
+
+QgsComposerRuler::~QgsComposerRuler()
+{
+}
+
+QSize QgsComposerRuler::minimumSizeHint() const
+{
+  return QSize( RULER_MIN_SIZE, RULER_MIN_SIZE );
+}
+
+void QgsComposerRuler::paintEvent( QPaintEvent* event )
+{
+  Q_UNUSED( event );
+
+  //draw blue rectangle for a test
+  QPainter p( this );
+  p.fillRect( rect(), QColor( 0, 0, 255 ) );
+}

src/gui/qgscomposerruler.h

@@ -0,0 +1,28 @@
+#ifndef QGSCOMPOSERRULER_H
+#define QGSCOMPOSERRULER_H
+
+#include <QWidget>
+
+/**A class to show paper scale and the current cursor position*/
+class QgsComposerRuler: public QWidget
+{
+  public:
+    enum Direction
+    {
+      Horizontal = 0,
+      Vertical
+    };
+
+    QgsComposerRuler( QgsComposerRuler::Direction d );
+    ~QgsComposerRuler();
+
+    QSize minimumSizeHint() const;
+
+  protected:
+    void paintEvent( QPaintEvent* event );
+
+  private:
+    Direction mDirection;
+};
+
+#endif // QGSCOMPOSERRULER_H