screenshot.cpp

shows how to fill ellipse in paint event using xtd::drawing::graphics::copy_from_screen.

Windows

macOS

Gnome

#include <xtd/xtd>
 
using namespace xtd;
using namespace xtd::drawing;
using namespace xtd::forms;
 
namespace screenshot_example {
  class form1 : public form {
  public:
    form1() {
      text("Screenshot");
      client_size({380, 320});
      
      screenshot_picture_box.size_mode(picture_box_size_mode::zoom);
      screenshot_picture_box.anchor(anchor_styles::left|anchor_styles::top|anchor_styles::right|anchor_styles::bottom);
 
      options_group_box.anchor(anchor_styles::left|anchor_styles::bottom|anchor_styles::right);
      screenshot_delay_label.auto_size(true);
      screenshot_delay_numeric_up_down.anchor(anchor_styles::left|anchor_styles::top|anchor_styles::right);
      hide_this_window_check_box.auto_size(true);
            
      screenshot_button.anchor(anchor_styles::left|anchor_styles::bottom);
      screenshot_button.click += {*this, &form1::on_screenshot_button_click};
      
      save_screenshot_button.anchor(anchor_styles::left|anchor_styles::bottom);
      save_screenshot_button.click += {*this, &form1::on_save_screenshot_button_click};
 
      quit_button.anchor(anchor_styles::left|anchor_styles::bottom);
      quit_button.click += {*this, &form1::close};
      
      take_screen_shot_timer.tick += {*this, &form1::on_take_screen_shot_timer_tick};
 
      take_new_screenshot();
    }
    
  private:
    auto on_save_screenshot_button_click() -> void {
      if (!screenshot_picture_box.image().has_value()) return;
      auto dialog = save_file_dialog {};
      dialog.filter("PNG image(*.png)|*.png");
      dialog.initial_directory(environment::get_folder_path(environment::special_folder::my_pictures));
      dialog.file_name("untitled");
      if (dialog.show_sheet_dialog(*this) == dialog_result::ok) screenshot_picture_box.image().value().save(dialog.file_name());
    }
    
    auto on_screenshot_button_click() -> void {
      screenshot_button.enabled(false);
      if (hide_this_window_check_box.checked()) hide();
      take_screen_shot_timer.interval(time_span::from_seconds(screenshot_delay_numeric_up_down.value()));
      take_screen_shot_timer.enabled(true);
    }
 
    auto on_take_screen_shot_timer_tick() -> void {
      take_screen_shot_timer.enabled(false);
      take_new_screenshot();
      if (hide_this_window_check_box.checked()) show();
      screenshot_button.enabled(true);
    }
 
    auto take_new_screenshot() -> void {
      auto screenshot_bitmap = bitmap {screen::primary_screen().bounds().width(), screen::primary_screen().bounds().height()};
      screenshot_bitmap.create_graphics().copy_from_screen({0, 0}, {0, 0}, screenshot_bitmap.size());
      screenshot_picture_box.image(screenshot_bitmap);
    }
    
    picture_box screenshot_picture_box = picture_box::create(*this, point {20, 20}, {340, 120});
    group_box options_group_box = group_box::create(*this, "Options", {20, 160}, {340, 94});
    label screenshot_delay_label = label::create(options_group_box, "Screenshot Delay (sec.) :", {15, 18});
    numeric_up_down screenshot_delay_numeric_up_down = numeric_up_down::create(options_group_box, 5, 0, 60, {190, 15}, {130, 25});
    check_box hide_this_window_check_box = check_box::create(options_group_box, "Hide This Window", {15, 45});
    button screenshot_button = button::create(*this, "New screenshot", {20, 270}, {130, 25});
    button save_screenshot_button = button::create(*this, "Save screenshot", {165, 270}, {130, 25});
    button quit_button = button::create(*this, "Quit", {310, 270}, {50, 25});
    timer take_screen_shot_timer;
  };
}
 
auto main() -> int {
  application::run(screenshot_example::form1 {});
}