# HG changeset patch
# User Pantxo Diribarne <pantxo.diribarne@gmail.com>
# Date 1429217529 -7200
# Node ID e05fe4260252fa9b3cb71cb975559771a41d2b90
# Parent  a42de4173533b1476fdfb85f192278d9f11384d0
Handle mouse interaction with image objects (bug #44691)

* gl-select.h (opengl_selector::draw_image): new method
* gl-select.cc (opengl_selector::draw_image): draw a GL_QUAD to indicate the image area in GL_SELECT mode

diff -r a42de4173533 -r e05fe4260252 libgui/graphics/gl-select.cc
--- a/libgui/graphics/gl-select.cc	Fri Apr 24 22:31:21 2015 -0400
+++ b/libgui/graphics/gl-select.cc	Thu Apr 16 22:52:09 2015 +0200
@@ -201,3 +201,35 @@
   return Matrix (1, 4, 0.0);
 #endif
 }
+
+void
+opengl_selector::draw_image (const image::properties& props)
+{
+  Matrix xd = props.get_xdata ().matrix_value ();
+  octave_idx_type nc = props.get_cdata ().matrix_value ().columns ();
+  double x_pix_size = (xd(1) - xd(0)) / (nc - 1);
+
+  Matrix yd = props.get_ydata ().matrix_value ();
+  octave_idx_type nr = props.get_cdata ().matrix_value ().rows ();
+  double y_pix_size = (yd(1) - yd(0)) / (nr - 1);
+
+  ColumnVector p1(3, 0.0), p2(3, 0.0), p3(3, 0.0), p4(3, 0.0);
+  p1(0) = xd(0) - x_pix_size/2;
+  p1(1) = yd(0) - y_pix_size/2;
+
+  p2(0) = xd(1) + x_pix_size/2;
+  p2(1) = yd(0) - y_pix_size/2;
+
+  p3(0) = xd(1) + x_pix_size/2;
+  p3(1) = yd(1) + y_pix_size/2;
+
+  p4(0) = xd(0) - x_pix_size/2;
+  p4(1) = yd(1) + y_pix_size/2;
+  
+  glBegin (GL_QUADS);
+  glVertex3dv (p1.data ());
+  glVertex3dv (p2.data ());
+  glVertex3dv (p3.data ());
+  glVertex3dv (p4.data ());
+  glEnd ();
+}
diff -r a42de4173533 -r e05fe4260252 libgui/graphics/gl-select.h
--- a/libgui/graphics/gl-select.h	Fri Apr 24 22:31:21 2015 -0400
+++ b/libgui/graphics/gl-select.h	Thu Apr 16 22:52:09 2015 +0200
@@ -48,6 +48,8 @@
 protected:
   virtual void draw_text (const text::properties& props);
 
+  virtual void draw_image (const image::properties& props);
+
   virtual void setup_opengl_transformation (const axes::properties& props);
 
   virtual void init_marker (const std::string& m, double size, float width);