image_list.cpp

The following code example demonstrate the use of image_list class.

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macOS

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#include <xtd/xtd>
 
using namespace xtd;
using namespace xtd::drawing;
using namespace xtd::forms;
 
namespace example {
  class form1 : public form {
  public:
    form1() {
      text("Image list example");
      client_size({300, 250});
      controls().push_back_range({picture, button_previous, button_next});
 
      pictures.image_size({128, 128});
      
      picture.back_color(system_colors::window());
      picture.border_style(forms::border_style::fixed_3d);
      picture.bounds({75, 25, 150, 150});
      picture.size_mode(picture_box_size_mode::center_image);
      picture.click += [&] {
        load_images();
      };
 
      button_previous.auto_repeat(true);
      button_previous.image(button_images::previous());
      button_previous.location({75, 200});
      button_previous.enabled(false);
      button_previous.click += [&] {
        if (current_image_index > 0) picture.image(pictures.images()[--current_image_index]);
        button_previous.enabled(current_image_index > 0);
        button_next.enabled(current_image_index < pictures.images().size() - 1);
      };
      
      button_next.auto_repeat(true);
      button_next.image(button_images::next());
      button_next.location({150, 200});
      button_next.enabled(false);
      button_next.click += [&] {
        if (current_image_index < pictures.images().size()) picture.image(pictures.images()[++current_image_index]);
        button_previous.enabled(current_image_index > 0);
        button_next.enabled(current_image_index < pictures.images().size() - 1);
      };
      
      show();
      load_images();
    }
    
  private:
    void load_images() {
      open_file_dialog ofd;
      ofd.multiselect(true);
      ofd.filter("All Image Files|*.bmp;*.gif;*.jpg;*.jpeg;*.png;*.tif;*.tiff;*.xpm|Bitmap Files|*.bmp|Gif Files|*.gif|Jpeg Files|*.jpg;*.jpeg|Png Files|*.png|Tiff Files|*.tif;*.tiff|xpm Files|*.xpm");
      if (ofd.show_dialog() == dialog_result::ok) {
        pictures.images().clear();
        for (auto file : ofd.file_names())
          pictures.images().push_back(drawing::image::from_file(file));
        current_image_index = 0;
        picture.image(pictures.images()[current_image_index]);
        button_previous.enabled(current_image_index > 0);
        button_next.enabled(current_image_index < pictures.images().size() - 1);
      }
    }
 
    size_t current_image_index = 0;
    image_list pictures;
    picture_box picture;
    button button_previous;
    button button_next;
  };
}
 
int main() {
  application::run(example::form1());
}