Rework event passing system to allow for pointer grabs

[libs/gltk.git] / source / panel.cpp

diff --git a/source/panel.cpp b/source/panel.cpp
index b029057de9f7799dc64d36d86ea919dc2925eb7c..f6aad86a856d90aa0440ebb1f0634544a2b3f51b 100644 (file)
--- a/source/panel.cpp
+++ b/source/panel.cpp
@@ -5,7 +5,9 @@ namespace Msp {
 namespace GLtk {
 
 Panel::Panel(const Resources &r):
-       Widget(r)
+       Widget(r),
+       pointer_focus(0),
+       pointer_grab(0)
 {
        update_style();
 }
@@ -16,6 +18,67 @@ Panel::~Panel()
                delete *i;
 }
 
+void Panel::button_press(int x, int y, unsigned btn)
+{
+       if(pointer_grab>0)
+               pointer_focus->button_press(x-geom.x, y-geom.y, btn);
+       else if(geom.is_inside(x, y))
+       {
+               for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
+                       if((*i)->get_geometry().is_inside(x-geom.x, y-geom.y))
+                       {
+                               (*i)->button_press(x-geom.x, y-geom.y, btn);
+                               pointer_grab=btn;
+                       }
+       }
+}
+
+void Panel::button_release(int x, int y, unsigned btn)
+{
+       if(pointer_grab>0)
+       {
+               pointer_focus->button_release(x-geom.x, y-geom.y, btn);
+
+               if(btn==pointer_grab)
+               {
+                       pointer_grab=0;
+
+                       for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
+                               if((*i)->get_geometry().is_inside(x-geom.x, y-geom.y))
+                               {
+                                       set_pointer_focus(*i);
+                                       break;
+                               }
+               }
+       }
+       else if(geom.is_inside(x, y))
+       {
+               for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
+                       if((*i)->get_geometry().is_inside(x-geom.x, y-geom.y))
+                               (*i)->button_release(x-geom.x, y-geom.y, btn);
+       }
+}
+
+void Panel::pointer_motion(int x, int y)
+{
+       if(pointer_grab>0)
+               pointer_focus->pointer_motion(x-geom.x, y-geom.y);
+       else if(geom.is_inside(x, y))
+       {
+               bool found=false;
+               for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
+                       if((*i)->get_geometry().is_inside(x-geom.x, y-geom.y))
+                       {
+                               set_pointer_focus(*i);
+                               (*i)->pointer_motion(x-geom.x, y-geom.y);
+                               found=true;
+                       }
+
+               if(!found)
+                       set_pointer_focus(0);
+       }
+}
+
 void Panel::add(Widget &wdg)
 {
        children.push_back(&wdg);
@@ -32,16 +95,18 @@ void Panel::render_part(const Part &part) const
                Widget::render_part(part);
 }
 
-void Panel::on_button_press(int x, int y, unsigned btn)
+void Panel::set_pointer_focus(Widget *wdg)
 {
-       for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
-               (*i)->button_press(x-geom.x, y-geom.y, btn);
-}
+       if(wdg!=pointer_focus && pointer_grab==0)
+       {
+               if(pointer_focus)
+                       pointer_focus->pointer_leave();
 
-void Panel::on_button_release(int x, int y, unsigned btn)
-{
-       for(ChildSeq::iterator i=children.begin(); i!=children.end(); ++i)
-               (*i)->button_release(x-geom.x, y-geom.y, btn);
+               pointer_focus=wdg;
+
+               if(pointer_focus)
+                       pointer_focus->pointer_enter();
+       }
 }
 
 } // namespace GLtk