fill_rectangle.cpp

shows how to fill rectangle in paint event using xtd::drawing::graphics::fill_rectangle.

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macOS

Gnome

#include <xtd/drawing/drawing_2d/conical_gradient_brush>
#include <xtd/drawing/drawing_2d/hatch_brush>
#include <xtd/drawing/drawing_2d/linear_gradient_brush>
#include <xtd/drawing/drawing_2d/radial_gradient_brush>
#include <xtd/drawing/solid_brush>
#include <xtd/drawing/texture_brush>
#include <xtd/forms/application>
#include <xtd/forms/form>
 
using namespace xtd;
using namespace xtd::drawing;
using namespace xtd::drawing::drawing_2d;
using namespace xtd::forms;
 
namespace fill_rectangle_example {
  class form1 : public form {
  public:
    form1() {
      text("Fill rectangle example");
      client_size({680, 340});
    }
    
  protected:
    void on_paint(paint_event_args& e) override {
      form::on_paint(e);
      
      auto back_color = color::navy;
      auto fore_color = color::white;
      
      e.graphics().fill_rectangle(solid_brush {color::transparent}, rectangle {10, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {10, 10, 150, 150});
      
      e.graphics().fill_rectangle(solid_brush {back_color}, rectangle {180, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {180, 10, 150, 150});
      
      e.graphics().fill_rectangle(texture_brush {create_circle_texture(fore_color, back_color)}, rectangle {350, 10, 150, 150});
      e.graphics().draw_rectangle(pen {fore_color, 4}, rectangle {350, 10, 150, 150});
      
      e.graphics().fill_rectangle(hatch_brush {hatch_style::diagonal_brick, color::white, back_color}, rectangle {520, 10, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {520, 10, 150, 150});
      
      e.graphics().fill_rectangle(conical_gradient_brush {point {85, 255}, back_color, fore_color, 0}, rectangle {10, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {10, 180, 150, 150});
      
      e.graphics().fill_rectangle(linear_gradient_brush {rectangle {180, 180, 150, 150}, back_color, fore_color, 315}, rectangle {180, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {180, 180, 150, 150});
      
      e.graphics().fill_rectangle(radial_gradient_brush {point {425, 255}, fore_color, back_color, 73}, rectangle {350, 180, 150, 150});
      e.graphics().draw_rectangle(pen {color::white, 4}, rectangle {350, 180, 150, 150});
    }
    
  private:
    auto create_circle_texture(const color& fore_color, const color& back_color)->image {
      auto texture = bitmap {16, 16};
      auto graphics = texture.create_graphics();
      graphics.fill_ellipse(solid_brush {back_color}, 1, 1, texture.width() - 2, texture.height() - 2);
      graphics.draw_ellipse(pen {fore_color, 2}, 1, 1, texture.width() - 2, texture.height() - 2);
      return texture;
    }
  };
}
 
auto main() -> int {
  application::run(fill_rectangle_example::form1 {});
}