make slider orientation configurable into 4 directions

2 files changed, 11 insertions, 6 deletions

diff --git a/lib/gui/eslider.cpp b/lib/gui/eslider.cpp
index dd2aac9e..c8b467c9 100644
--- a/lib/gui/eslider.cpp
+++ b/lib/gui/eslider.cpp
@@ -70,10 +70,14 @@ int eSlider::event(int event, void *data, void *data2)
 
 		if (m_min < m_max)
 		{
-			num_pix = pixsize * (m_value - m_start) / (m_max - m_min);
-			start_pix = pixsize * m_start / (m_max - m_min);
+			int val_range = m_max - m_min;
+			num_pix = (pixsize * (m_value - m_start) + val_range - 1) / val_range; /* properly round up */
+			start_pix = (pixsize * m_start + val_range - 1) / val_range;
+
+			if (m_orientation_swapped)
+				start_pix = pixsize - num_pix - start_pix;
 		}
-		
+
 		if  (start_pix < 0)
 		{
 			num_pix += start_pix;
@@ -113,9 +117,10 @@ void eSlider::setStartEnd(int start, int end)
 	event(evtChangedSlider);
 }
 
-void eSlider::setOrientation(int orientation)
+void eSlider::setOrientation(int orientation, int swapped)
 {
 	m_orientation = orientation;
+	m_orientation_swapped = swapped;
 	event(evtChangedSlider);
 }
 
diff --git a/lib/gui/eslider.h b/lib/gui/eslider.h
index c5440726..9a3e8395 100644
--- a/lib/gui/eslider.h
+++ b/lib/gui/eslider.h
@@ -11,7 +11,7 @@ public:
 	void setStartEnd(int start, int end);
 	void setRange(int min, int max);
 	enum { orHorizontal, orVertical };
-	void setOrientation(int orientation);
+	void setOrientation(int orientation, int swapped = 0);
 	void setBorderWidth(int pixel);
 	void setBorderColor(const gRGB &color);
 	void setPixmap(gPixmap *pixmap);
@@ -24,7 +24,7 @@ private:
 		evtChangedSlider = evtUserWidget
 	};
 	bool m_have_border_color;
-	int m_min, m_max, m_value, m_start, m_orientation, m_border_width;
+	int m_min, m_max, m_value, m_start, m_orientation, m_orientation_swapped, m_border_width;
 	ePtr<gPixmap> m_pixmap;
 	
 	gRegion m_currently_filled;