owner_button.cpp

demonstrates how to create a custom button with xtd::forms::button control.

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macOS

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#include <xtd/drawing/drawing_2d/linear_gradient_brush>
#include <xtd/forms/application>
#include <xtd/forms/button>
#include <xtd/forms/control_paint>
#include <xtd/forms/form>
 
using namespace xtd;
using namespace xtd::drawing;
using namespace xtd::forms;
 
namespace owner_button_example {
  class owner_button : public button {
  protected:
    void on_paint(paint_event_args& e) override {
      auto accentuate_color = [](const color & c, float percent) {
        return application::dark_mode() ? control_paint::light(c, percent) : control_paint::dark(c, percent);
      };
      auto background_color = get_back_color().value_or(application::style_sheet().system_colors().control());
      auto foreground_color = get_fore_color().value_or(application::style_sheet().system_colors().control_text());
      auto button_color = accentuate_color(background_color, .05F);
      auto border_color = accentuate_color(background_color, .15F);
      auto text_color = foreground_color;
      
      if (state() == visual_styles::push_button_state::hot || state() == visual_styles::push_button_state::default_state) {
        border_color = accentuate_color(border_color, .15F);
        button_color = accentuate_color(background_color, .15F);
        text_color = accentuate_color(foreground_color, .15F);
      } else if (state() == visual_styles::push_button_state::pressed || state() == visual_styles::push_button_state::checked) {
        border_color = accentuate_color(border_color, .30F);
        button_color = accentuate_color(background_color, .30F);
        text_color =  accentuate_color(foreground_color, .30F);
      } else if (state() == visual_styles::push_button_state::disabled) {
        border_color = button_color = color::from_argb(85, 85, 55);
        text_color = application::style_sheet().system_colors().gray_text();
      }
      
      e.graphics().fill_rounded_rectangle(drawing_2d::linear_gradient_brush(e.clip_rectangle(), control_paint::light(button_color, .2), control_paint::dark(button_color), drawing_2d::linear_gradient_mode::vertical), e.clip_rectangle().x, e.clip_rectangle().y, e.clip_rectangle().width, e.clip_rectangle().height, e.clip_rectangle().height / 2);
      e.graphics().draw_rounded_rectangle(pen(border_color, 1), e.clip_rectangle().x, e.clip_rectangle().y, e.clip_rectangle().width - 1, e.clip_rectangle().height - 1, e.clip_rectangle().height / 2);
      e.graphics().draw_string(text(), font(), solid_brush(text_color), rectangle(e.clip_rectangle().x + 5, e.clip_rectangle().y + 3, e.clip_rectangle().width - 10, e.clip_rectangle().height - 7), string_format().alignment(string_alignment::center).line_alignment(string_alignment::center));
    }
  };
  
  class form1 : public form {
  public:
    form1() {
      owner_button1.location({145, 25});
      owner_button1.size({80, 25});
      owner_button1.text("Button 1");
      
      owner_button2.location({105, 70});
      owner_button2.size({160, 50});
      owner_button2.back_color(color::red);
      owner_button2.fore_color(color::white);
      owner_button2.text("Button 2");
      
      owner_button3.location({25, 145});
      owner_button3.size({320, 100});
      owner_button3.back_color(color::blue);
      owner_button3.fore_color(color::white);
      owner_button3.text("Button 3");
      
      text("Owner button example");
      client_size({370, 270});
      controls().push_back_range({owner_button1, owner_button2, owner_button3});
    }
    
  private:
    owner_button owner_button1;
    owner_button owner_button2;
    owner_button owner_button3;
  };
}
 
auto main() -> int {
  application::run(owner_button_example::form1 {});
}