Don't rebuild on state change if there are no visual changes

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

diff --git a/source/widget.cpp b/source/widget.cpp
index 3f11af6d32e08bb707fc5b78bedd9b8aab964cf1..8b7f1cbd88b351305a83f6dd56b2c9d5e32ac69b 100644 (file)
--- a/source/widget.cpp
+++ b/source/widget.cpp
@@ -1,7 +1,5 @@
-#include <msp/gl/immediate.h>
 #include <msp/gl/matrix.h>
-#include <msp/gl/transform.h>
-#include <msp/strings/formatter.h>
+#include <msp/strings/format.h>
 #include "container.h"
 #include "resources.h"
 #include "root.h"
@@ -32,47 +30,89 @@ Widget::~Widget()
 
 void Widget::set_position(int x, int y)
 {
-       geom.x = x;
-       geom.y = y;
-       on_geometry_change();
+       set_geometry(Geometry(x, y, geom.w, geom.h));
 }
 
 void Widget::set_size(unsigned w, unsigned h)
 {
-       geom.w = w;
-       geom.h = h;
-       on_geometry_change();
+       set_geometry(Geometry(geom.x, geom.y, w, h));
 }
 
 void Widget::autosize()
 {
-       geom.w = 0;
-       geom.h = 0;
+       Geometry ageom;
+       autosize(ageom);
+       set_geometry(ageom);
+}
+
+void Widget::autosize(Geometry &ageom) const
+{
+       if(!style)
+               return;
+
+       ageom = Geometry(geom.x, geom.y, 0, 0);
        const Style::PartSeq &parts = style->get_parts();
        for(Style::PartSeq::const_iterator i=parts.begin(); i!=parts.end(); ++i)
+       {
                if(i->get_name().empty())
                {
-                       geom.w = max(geom.w, i->get_geometry().w);
-                       geom.h = max(geom.h, i->get_geometry().h);
+                       const Geometry &pgeom = i->get_geometry();
+                       const Sides &pmargin = i->get_margin();
+                       ageom.w = max(ageom.w, pgeom.w+pmargin.left+pmargin.right);
+                       ageom.h = max(ageom.h, pgeom.h+pmargin.top+pmargin.bottom);
                }
+               else
+                       autosize_special(*i, ageom);
+       }
 }
 
 void Widget::set_geometry(const Geometry &g)
 {
+       bool size_changed = (g.w!=geom.w || g.h!=geom.h);
        geom = g;
-       on_geometry_change();
+       if(size_changed)
+       {
+               // TODO maybe rename this to on_size_change
+               on_geometry_change();
+               rebuild();
+       }
+}
+
+void Widget::map_coords_to_ancestor(int &x, int &y, const Widget &ancestor) const
+{
+       for(const Widget *w=this; w; w=w->get_parent())
+       {
+               if(w==&ancestor)
+                       return;
+
+               const Geometry &wgeom = w->get_geometry();
+               x += wgeom.x;
+               y += wgeom.y;
+       }
+
+       throw hierarchy_error("not an ancestor");
 }
 
 void Widget::set_parent(Container *p)
 {
        if(parent && p)
-               throw InvalidState("Widget is already in a Container");
+               throw hierarchy_error("widget already parented");
        else if(p==parent)
                return;
-       parent = p;
 
-       on_reparent();
-       update_style();
+       try
+       {
+               parent = p;
+
+               on_reparent();
+               update_style();
+       }
+       catch(...)
+       {
+               // The container has not yet added the widget as its child
+               parent = 0;
+               throw;
+       }
 }
 
 void Widget::set_style(const string &s)
@@ -97,11 +137,12 @@ void Widget::update_style()
                        sname += style_name;
                }
 
-               style = root->get_resources().get<Style>(sname);
+               style = &root->get_resources().get<Style>(sname);
        }
 
        on_style_change();
        signal_autosize_changed.emit();
+       rebuild();
 }
 
 void Widget::set_tooltip(const string &t)
@@ -127,52 +168,85 @@ void Widget::set_focusable(bool f)
 void Widget::set_focus()
 {
        if(!parent)
-               throw InvalidState("No parent");
+               throw hierarchy_error("no parent");
        if(!visible)
-               throw InvalidState("Can't set focus on invisible widget");
+               throw logic_error("!visible");
 
        signal_request_focus.emit();
 }
 
-void Widget::render() const
+void Widget::set_enabled(bool e)
+{
+       set_state(DISABLED, (e ? NORMAL : DISABLED));
+}
+
+void Widget::set_state(State mask, State bits)
+{
+       State old_state = state;
+       state = (state&~mask)|bits;
+       if(style && style->compare_states(old_state, state))
+               rebuild();
+}
+
+void Widget::rebuild()
 {
        if(!style)
-               throw InvalidState(format("Attempt to render a widget with null style (class=\"%s\", style_name=\"%s\")", get_class(), style_name));
+               return;
 
-       GL::push_matrix();
-       GL::translate(geom.x, geom.y, 0);
+       part_cache.clear();
        const Style::PartSeq &parts = style->get_parts();
        for(Style::PartSeq::const_iterator i=parts.begin(); i!=parts.end(); ++i)
        {
                if(i->get_name().empty())
+                       i->build(geom, state, part_cache);
+               else
+                       rebuild_special(*i);
+       }
+}
+
+void Widget::rebuild_special(const Part &part)
+{
+       part_cache.insert_special(part);
+}
+
+void Widget::render(GL::Renderer &renderer) const
+{
+       if(!style)
+               throw logic_error(format("Attempt to render a widget with null style (class=\"%s\", style_name=\"%s\")", get_class(), style_name));
+
+       GL::MatrixStack::Push _pushm(renderer.matrix_stack());
+       renderer.matrix_stack() *= GL::Matrix::translation(geom.x, geom.y, 0);
+       const PartCache::PartList &parts = part_cache.get_parts();
+       for(PartCache::PartList::const_iterator i=parts.begin(); i!=parts.end(); ++i)
+       {
+               if(i->mesh && i->texture)
                {
-                       GL::PushMatrix push_;
-                       i->render(geom, state);
+                       renderer.set_texture(i->texture);
+                       i->mesh->draw(renderer);
                }
-               else
-                       render_special(*i);
+               else if(i->part)
+                       render_special(*i->part, renderer);
        }
-       GL::pop_matrix();
 }
 
 void Widget::pointer_enter()
 {
-       state |= HOVER;
+       set_state(HOVER);
 }
 
 void Widget::pointer_leave()
 {
-       state &= ~HOVER;
+       clear_state(HOVER);
 }
 
 void Widget::focus_in()
 {
-       state |= FOCUS;
+       set_state(FOCUS);
 }
 
 void Widget::focus_out()
 {
-       state &= ~FOCUS;
+       clear_state(FOCUS);
 }