Zoom in and out with the mouse wheel.

[ipdf/code.git] / src / view.cpp

diff --git a/src/view.cpp b/src/view.cpp
index 9e832d2..80f4986 100644 (file)
--- a/src/view.cpp
+++ b/src/view.cpp
@@ -5,6 +5,36 @@
 using namespace IPDF;
 using namespace std;
 
+void View::Translate(Real x, Real y)
+{
+       x *= m_bounds.w;
+       y *= m_bounds.h;
+       m_bounds.x += x;
+       m_bounds.y += y;
+}
+
+void View::ScaleAroundPoint(Real x, Real y, Real scaleAmt)
+{
+       // Convert to local coords.
+       x *= m_bounds.w;
+       y *= m_bounds.h;
+       x += m_bounds.x;
+       y += m_bounds.y;
+       
+       Debug("Mouse wheel event %f %f %f\n", Float(x), Float(y), Float(scaleAmt));
+       
+       Real top = y - m_bounds.y;
+       Real left = x - m_bounds.x;
+       
+       top *= scaleAmt;
+       left *= scaleAmt;
+       
+       m_bounds.x = x - left;
+       m_bounds.y = y - top;
+       m_bounds.w *= scaleAmt;
+       m_bounds.h *= scaleAmt;
+}
+
 void View::Render()
 {
        static bool debug_output_done = false;
@@ -19,7 +49,7 @@ void View::Render()
 
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
-       glOrtho(m_bounds.x, m_bounds.x+m_bounds.w, m_bounds.y + m_bounds.h, m_bounds.y, -1.f, 1.f);
+       glOrtho(Float(m_bounds.x), Float(m_bounds.x)+Float(m_bounds.w), Float(m_bounds.y) + Float(m_bounds.h), Float(m_bounds.y), -1.f, 1.f);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
 
@@ -30,10 +60,10 @@ void View::Render()
                if (m_document.m_objects.types[id] == RECT_FILLED)
                        continue;
                Rect obj_bounds = m_document.m_objects.bounds[id];
-               glVertex2f(obj_bounds.x, obj_bounds.y);
-               glVertex2f(obj_bounds.x + obj_bounds.w, obj_bounds.y);
-               glVertex2f(obj_bounds.x + obj_bounds.w, obj_bounds.y + obj_bounds.h);
-               glVertex2f(obj_bounds.x, obj_bounds.y + obj_bounds.h);
+               glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y));
+               glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y));
+               glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y) + Float(obj_bounds.h));
+               glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y) + Float(obj_bounds.h));
        }
        glEnd();
 
@@ -43,10 +73,10 @@ void View::Render()
                        continue;
                Rect obj_bounds = m_document.m_objects.bounds[id];
                glBegin(GL_LINE_LOOP);
-               glVertex2f(obj_bounds.x, obj_bounds.y);
-               glVertex2f(obj_bounds.x + obj_bounds.w, obj_bounds.y);
-               glVertex2f(obj_bounds.x + obj_bounds.w, obj_bounds.y + obj_bounds.h);
-               glVertex2f(obj_bounds.x, obj_bounds.y + obj_bounds.h);
+               glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y));
+               glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y));
+               glVertex2f(Float(obj_bounds.x) + Float(obj_bounds.w), Float(obj_bounds.y) + Float(obj_bounds.h));
+               glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y) + Float(obj_bounds.h));
                glEnd();
        }