themed_canvas_overlay.cxx

#include "themed_canvas_overlay.h"
 
namespace cgv {
namespace app {
 
themed_canvas_overlay::themed_canvas_overlay() : canvas_overlay() {
    const auto& theme = cgv::gui::theme_info::instance();
    init_container_style(theme);
    set_margin(cgv::ivec2(-theme.spacing()));
}
 
bool themed_canvas_overlay::init(cgv::render::context& ctx) {
    register_shader("rectangle", cgv::g2d::shaders::rectangle);
    return canvas_overlay::init(ctx);
}
 
void themed_canvas_overlay::begin_content(cgv::render::context& ctx, bool clear_frame_buffer) {
    canvas_overlay::begin_content(ctx, clear_frame_buffer);
    
    if(background_visible_) {
        content_canvas.enable_shader(ctx, "rectangle");
        content_canvas.set_style(ctx, container_style_);
        content_canvas.draw_shape(ctx, get_local_rectangle());
        content_canvas.disable_current_shader(ctx);
    }
}
 
void themed_canvas_overlay::handle_theme_change(const cgv::gui::theme_info& theme) {
    init_container_style(theme);
    init_styles();
    post_damage();
}
 
void themed_canvas_overlay::init_container_style(const cgv::gui::theme_info& theme) {
    // configure style for the container background
    container_style_.fill_color = theme.group();
    container_style_.border_color = theme.background();
    container_style_.border_width = static_cast<float>(theme.spacing());
    container_style_.feather_width = 0.0f;
}
 
cgv::g2d::irect themed_canvas_overlay::get_content_rectangle() const {
    auto rectangle = get_local_rectangle();
    rectangle.scale(-padding_);
    return rectangle;
}
 
void themed_canvas_overlay::set_background_visible(bool flag) {
    background_visible_ = flag;
    on_set(&background_visible_);
}
 
}
}