Change State into a bitmask to allow more fine-grained control of styles

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

diff --git a/source/widget.cpp b/source/widget.cpp
index 7f153eb5540e4462bfa57645fab2b113cfb06a8b..be1f0a0cc90fb981bc0ea1a121e3f3f92d95030e 100644 (file)
--- a/source/widget.cpp
+++ b/source/widget.cpp
@@ -1,29 +1,54 @@
+/* $Id$
+
+This file is part of libmspgltk
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
 #include <msp/gl/matrix.h>
 #include <msp/gl/transform.h>
+#include <msp/strings/formatter.h>
+#include "panel.h"
 #include "resources.h"
 #include "widget.h"
 
-#include <iostream>
 using namespace std;
 
 namespace Msp {
 namespace GLtk {
 
+Widget::Widget(const Resources &r):
+       res(r),
+       style(0),
+       state(NORMAL),
+       visible(true),
+       parent(0)
+{ }
+
+Widget::~Widget()
+{
+       if(parent)
+               parent->remove(*this);
+}
+
 void Widget::set_position(int x, int y)
 {
        geom.x=x;
        geom.y=y;
+       on_geometry_change();
 }
 
 void Widget::set_size(unsigned w, unsigned h)
 {
        geom.w=w;
        geom.h=h;
+       on_geometry_change();
 }
 
 void Widget::set_geometry(const Geometry &g)
 {
        geom=g;
+       on_geometry_change();
 }
 
 void Widget::set_style(const string &s)
@@ -32,34 +57,34 @@ void Widget::set_style(const string &s)
        update_style();
 }
 
+void Widget::set_visible(bool v)
+{
+       if(v==visible)
+               return;
+
+       visible=v;
+
+       if(!visible && parent)
+               parent->child_hidden(*this);
+}
+
 void Widget::render() const
 {
        if(!style)
-               throw InvalidState("Attempt to render a widget without a style");
+               throw InvalidState(format("Attempt to render a widget without a style (class=\"%s\")", get_class()));
 
        GL::push_matrix();
        GL::translate(geom.x, geom.y, 0);
        for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
-               render_part(*i);
+       {
+               if(i->get_name().empty())
+                       render_graphic(*i);
+               else
+                       render_special(*i);
+       }
        GL::pop_matrix();
 }
 
-Widget::Widget(const Resources &r):
-       res(r),
-       style(0),
-       state(NORMAL)
-{ }
-
-void Widget::update_style()
-{
-       style=&res.get_style(get_class(), style_name);
-}
-
-void Widget::render_part(const Part &part) const
-{
-       render_graphic(part);
-}
-
 void Widget::render_graphic(const Part &part) const
 {
        GL::push_matrix();
@@ -70,16 +95,19 @@ void Widget::render_graphic(const Part &part) const
 void Widget::render_text(const Part &part, const string &text) const
 {
        const GL::Font *const font=style->get_font();
-
        const float font_size=font->get_default_size();
-       unsigned text_w=static_cast<unsigned>(font->get_string_width(text)*font_size);
 
-       GL::push_matrix();
+       Geometry rgeom;
+       rgeom.w=static_cast<unsigned>(font->get_string_width(text)*font_size);
+       rgeom.h=static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
+       rgeom.y=static_cast<int>(-font->get_descent()*font_size);
+       part.get_alignment().apply(rgeom, geom, part.get_margin());
 
-       part.get_alignment().apply(geom, text_w, static_cast<unsigned>(font->get_ascent()*font_size));
+       GL::push_matrix();
+       GL::translate(rgeom.x, rgeom.y, 0);
        GL::scale_uniform(font_size);
 
-       const Color &color=style->get_font_color();
+       const GL::Color &color=style->get_font_color();
        glColor3f(color.r, color.g, color.b);
        font->draw_string(text);
        glColor3f(1, 1, 1);
@@ -87,5 +115,76 @@ void Widget::render_text(const Part &part, const string &text) const
        GL::pop_matrix();
 }
 
+void Widget::pointer_enter()
+{
+       state|=HOVER;
+}
+
+void Widget::pointer_leave()
+{
+       state&=~HOVER;
+}
+
+void Widget::focus_in()
+{
+       state|=FOCUS;
+}
+
+void Widget::focus_out()
+{
+       state&=~FOCUS;
+}
+
+void Widget::update_style()
+{
+       string sname=get_class();
+       if(!style_name.empty())
+       {
+               sname+='-';
+               sname+=style_name;
+       }
+       style=res.get<Style>(sname);
+       on_style_change();
+}
+
+void Widget::set_parent(Panel *p)
+{
+       if(parent && p)
+               throw InvalidState("Widget is already in a Panel");
+       parent=p;
+
+       on_reparent();
+}
+
+void Widget::set_parent(Widget &w, Panel *p)
+{
+       w.set_parent(p);
+}
+
+
+Widget::Loader::Loader(Widget &w):
+       wdg(w)
+{
+       add("position", &Loader::position);
+       add("size",     &Loader::size);
+       add("style",    &Loader::style);
+       add("visible",  &Widget::visible);
+}
+
+void Widget::Loader::position(int x, int y)
+{
+       wdg.set_position(x, y);
+}
+
+void Widget::Loader::size(unsigned w, unsigned h)
+{
+       wdg.set_size(w, h);
+}
+
+void Widget::Loader::style(const string &s)
+{
+       wdg.set_style(s);
+}
+
 } // namespace GLtk
 } // namespace Msp