- Enable drawing of resources as ``3d'' cubes

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@1059 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/cairo_elements.cc

@@ -83,16 +83,59 @@ CairoElements::draw_3dsphere(const Point& center, float radius, const Color& cl)
 }
 
 void
-CairoElements::draw_3dcube(const Rectangle& area, const Color& cl)
+CairoElements::draw_3dcube(const Rectangle& area, const Color& cl,
+                           const float x_percent, const float y_percent)
 {
   cairo_t*& cr = _ctx;
   const float& x0 = area.x0;
   const float& y0 = area.y0;
   const float& w = area.w;
   const float& h = area.h;
+  const float& r = cl.r;
+  const float& g = cl.b;
+  const float& b = cl.b;
+
+  cairo_save(cr);
+  cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
+
+  // Front side of the cube:
+  cairo_rectangle(cr, 
+                  x0,               y0 + (1 - y_percent) * h,
+                  w * x_percent,    h * y_percent);
+                  
+  cairo_set_source_rgb(cr, r, g, b);
+  cairo_fill_preserve(cr);
+  cairo_set_source_rgb(cr, 0, 0, 0);
+  cairo_stroke(cr);
+
+  // ``Upper'' visible cube side:
+  cairo_new_path(cr);
+  cairo_move_to(cr, x0, y0 + (1 - y_percent) * h);
+  cairo_line_to(cr, x0 + (1 - x_percent) * w, y0);
+  cairo_line_to(cr, x0 + w, y0);
+  cairo_line_to(cr, x0 + w * x_percent, y0 + (1 - y_percent) * h);
+  cairo_close_path(cr);
+
+  cairo_set_source_rgb(cr, r - 0.2, g - 0.2, b - 0.2);
+  cairo_fill_preserve(cr);
+  cairo_set_source_rgb(cr, 0, 0, 0);
+  cairo_stroke(cr);
 
   
-  // FIXME : not implemented
+  // ``Right'' visible cube side:
+  cairo_new_path(cr);
+  cairo_move_to(cr, x0 + w * x_percent, y0 + (1 - y_percent) * h);
+  cairo_line_to(cr, x0 + w, y0);
+  cairo_line_to(cr, x0 + w, y0 + y_percent * h);
+  cairo_line_to(cr, x0 + w * x_percent, y0 + h);
+  cairo_close_path(cr);
+
+  cairo_set_source_rgb(cr, r - 0.4, g - 0.4, b - 0.4);
+  cairo_fill_preserve(cr);
+  cairo_set_source_rgb(cr, 0, 0, 0);
+  cairo_stroke(cr);
+
+  cairo_restore(cr);
 }
 
 

src/cairo_elements.hh

@@ -65,7 +65,7 @@ namespace sgpem
     CairoElements(cairo_t* const ctx);
 
     void draw_3dsphere(const Point& center, float radius, const Color& cl);
-    void draw_3dcube(const Rectangle& area, const Color& cl);
+    void draw_3dcube(const Rectangle& area, const Color& cl, const float x_percent, const float y_percent);
     void draw_container(const Rectangle& area);
     void draw_expandable(const Rectangle& area, bool expanded = false);
 

src/holt_widget.cc

@@ -104,30 +104,38 @@ HoltResource::~HoltResource()
 
 void HoltResource::draw(cairo_t *cr)
 {
-  // draw rectangle
+  static const Color white(1, 1, 1);
-  cairo_rectangle(cr,
-    _pos.real() - _radius,  _pos.imag() - _radius,
-    2*_radius, 2*_radius);
-  // fill
-  cairo_set_source_rgb (cr, 1, 1, 1);
-  cairo_fill_preserve (cr);
 
+  static const float x_percent = 3.5f / 4;
+  static const float y_percent = 4.5f / 5;
+
+  CairoElements ce(cr);
  
   // outline
   cairo_set_source_rgb (cr, 0, 0, 0);
 
+  // draw rectangle
+  Rectangle area(_pos.real() - _radius,  _pos.imag() - _radius, 2*_radius, 2*_radius);
+  ce.draw_3dcube(area, white, x_percent, y_percent);
+
+  cairo_save(cr);
   // clip text outside region
-  cairo_clip_preserve (cr); 
+  cairo_rectangle(cr, _pos.real() - _radius, _pos.imag() - _radius, 
+                  2 * _radius * x_percent, 2 * _radius * y_percent);
+
+  cairo_clip(cr); 
   // draw text
   cairo_text_extents_t extents;
   cairo_text_extents(cr, _resource->get_name().c_str(), &extents);
-  // cairo_move_to(cr, xpos - _radius, ypos - _radius + extents.height);
+  cairo_move_to(cr, 
-  cairo_move_to(cr, _pos.real() - extents.width/2, _pos.imag() + extents.height/2);
+                _pos.real() - extents.width  * (1 - x_percent + x_percent / 2),
+                _pos.imag() + extents.height * ((1 - y_percent) / 2 + 0.5) );
   cairo_show_text(cr, _resource->get_name().c_str());
-  cairo_reset_clip (cr); // reset clip region
 
   // stroke all
   cairo_stroke (cr);
+
+  cairo_restore(cr);
 }
 
 Vec2 HoltResource::get_intersection_to(Vec2 pt)