Refactor child positioning logic

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

diff --git a/source/container.cpp b/source/container.cpp
index fade54edbb00e58eb87283bb42f460bf99052dfe..7c2e3fb4e8c8afb87b1aa41b49972575a27ffa62 100644 (file)
--- a/source/container.cpp
+++ b/source/container.cpp
@@ -1,4 +1,5 @@
 #include "container.h"
+#include "part.h"
 
 using namespace std;
 
@@ -51,6 +52,36 @@ Container::Child *Container::create_child(Widget *wdg)
        return new Child(*this, wdg);
 }
 
+Geometry Container::determine_child_geometry(const Widget &child, const Part &part) const
+{
+       Geometry pgeom = part.get_geometry();
+       if(!pgeom.w || !pgeom.h)
+       {
+               Geometry cgeom;
+               child.autosize(cgeom);
+               if(!pgeom.w)
+                       pgeom.w = cgeom.w;
+               if(!pgeom.h)
+                       pgeom.h = cgeom.h;
+       }
+
+       part.get_alignment().apply(pgeom, geom, part.get_margin());
+       return pgeom;
+}
+
+void Container::autosize_child(const Widget &child, const Part &part, Geometry &ageom) const
+{
+       Geometry cgeom = determine_child_geometry(child, part);
+       const Sides &margin = part.get_margin();
+       ageom.w = max(ageom.w, cgeom.w+margin.left+margin.right);
+       ageom.h = max(ageom.h, cgeom.h+margin.top+margin.bottom);
+}
+
+void Container::reposition_child(Widget &child, const Part &part) const
+{
+       child.set_geometry(determine_child_geometry(child, part));
+}
+
 list<Widget *> Container::get_children() const
 {
        list<Widget *> result;
@@ -135,96 +166,71 @@ Widget *Container::get_final_input_focus() const
 
 void Container::button_press(int x, int y, unsigned btn)
 {
-       if(pointer_grabbed)
-       {
-               const Geometry &cgeom = pointer_focus->get_geometry();
-               pointer_focus->button_press(x-cgeom.x, y-cgeom.y, btn);
-       }
-       else
+       if(Widget *child = get_pointer_target(x, y))
        {
-               if(Widget *wdg = get_child_at(x, y))
-               {
-                       set_pointer_focus(wdg);
-                       if(wdg->is_focusable())
-                               set_input_focus(wdg);
-               }
-               if(click_focus)
+               if(!click_focus)
                {
-                       const Geometry &cgeom = click_focus->get_geometry();
-                       click_focus->button_press(x-cgeom.x, y-cgeom.y, btn);
-               }
-               else
-               {
-                       if(Widget *wdg = get_child_at(x, y))
-                       {
-                               click_focus = wdg;
-                               click_button = btn;
-
-                               const Geometry &cgeom = wdg->get_geometry();
-                               wdg->button_press(x-cgeom.x, y-cgeom.y, btn);
-                       }
+                       set_pointer_focus(child);
+                       if(child->is_focusable())
+                               set_input_focus(child);
+
+                       click_focus = child;
+                       click_button = btn;
                }
+
+               const Geometry &cgeom = child->get_geometry();
+               child->button_press(x-cgeom.x, y-cgeom.y, btn);
        }
 }
 
 void Container::button_release(int x, int y, unsigned btn)
 {
-       if(pointer_grabbed)
+       if(Widget *child = get_pointer_target(x, y))
        {
-               const Geometry &cgeom = pointer_focus->get_geometry();
-               pointer_focus->button_release(x-cgeom.x, y-cgeom.y, btn);
-       }
-       else if(click_focus)
-       {
-               Widget *wdg = click_focus;
-
-               if(btn==click_button)
-                       click_focus = 0;
-
-               const Geometry &cgeom = wdg->get_geometry();
-               wdg->button_release(x-cgeom.x, y-cgeom.y, btn);
-       }
-       else
-       {
-               if(Widget *wdg = get_child_at(x, y))
+               if(child==click_focus && btn==click_button)
                {
-                       const Geometry &cgeom = wdg->get_geometry();
-                       wdg->button_release(x-cgeom.x, y-cgeom.y, btn);
+                       click_focus = 0;
+                       if(!pointer_focus)
+                               set_pointer_focus(get_child_at(x, y));
                }
+
+               const Geometry &cgeom = child->get_geometry();
+               child->button_release(x-cgeom.x, y-cgeom.y, btn);
        }
 }
 
 void Container::pointer_motion(int x, int y)
 {
-       if(pointer_grabbed)
+       Widget *child = get_pointer_target(x, y);
+       if(!pointer_grabbed)
+               set_pointer_focus((!click_focus || child->get_geometry().is_inside(x, y)) ? child : 0);
+
+       if(child)
        {
-               const Geometry &cgeom = pointer_focus->get_geometry();
-               pointer_focus->pointer_motion(x-cgeom.x, y-cgeom.y);
+               const Geometry &cgeom = child->get_geometry();
+               child->pointer_motion(x-cgeom.x, y-cgeom.y);
        }
+}
+
+Widget *Container::get_pointer_target(int x, int y)
+{
+       if(pointer_grabbed)
+               return pointer_focus;
+       else if(click_focus)
+               return click_focus;
        else
        {
-               set_pointer_focus(get_child_at(x, y));
-               if(click_focus)
-               {
-                       const Geometry &cgeom = click_focus->get_geometry();
-                       click_focus->pointer_motion(x-cgeom.x, y-cgeom.y);
-               }
+               Widget *child = get_child_at(x, y);
+               if(child && child->is_enabled())
+                       return child;
                else
-               {
-                       Widget *wdg = get_child_at(x, y);
-                       if(wdg)
-                       {
-                               const Geometry &cgeom = wdg->get_geometry();
-                               wdg->pointer_motion(x-cgeom.x, y-cgeom.y);
-                       }
-               }
+                       return 0;
        }
 }
 
 void Container::pointer_leave()
 {
        Widget::pointer_leave();
-       click_focus = 0;
        set_pointer_focus(0);
 }