factor out viewport to display scaling functions

[mussa.git] / alg / glseqbrowser.cpp

diff --git a/alg/glseqbrowser.cpp b/alg/glseqbrowser.cpp
index afcf6a97fc72d86df432e88978bb20a86c4f64cf..df9462618b119f56c704a234a059d184ef2c8a4a 100644 (file)
--- a/alg/glseqbrowser.cpp
+++ b/alg/glseqbrowser.cpp
@@ -144,10 +144,8 @@ void GlSeqBrowser::processSelection(GLuint hits, GLuint buffer[], GLuint bufsize
 
 void GlSeqBrowser::selectRegion(int top, int left, int bottom, int right)
 {
-  GLfloat x_scale = cur_ortho.width()/((float)viewport_size.x);
-  GLfloat y_scale = cur_ortho.height()/((float)viewport_size.y);
-  GLfloat x_left = cur_ortho.left + (left*x_scale);
-  GLfloat x_right = cur_ortho.left + (right * x_scale);
+  GLfloat x_left = viewportXtoWorldX(left);
+  GLfloat x_right = viewportXtoWorldX(right);cur_ortho.left;
 
   if (top > bottom) {
     // woah, someone gave us a rectangle with the origin in the lower left
@@ -156,8 +154,8 @@ void GlSeqBrowser::selectRegion(int top, int left, int bottom, int right)
     top = temp;
   }
   // swap the orientation of canvas coordinates
-  GLfloat y_top = cur_ortho.top-(bottom*y_scale);
-  GLfloat y_bottom = cur_ortho.top - top * y_scale;
+  GLfloat y_top = viewportYtoWorldY(bottom);
+  GLfloat y_bottom = viewportYtoWorldY(top);
   selectedRegion = rect<float>(y_top, x_left, y_bottom, x_right);
 
   // hopefully this will make a buffer big enough to receive