Class DragDropTarget

examples/Showcase/examples_frame.cpp:135–177

};

class DragDropTarget : public visage::Frame {
public:
  void draw(visage::Canvas& canvas) override {
    canvas.setColor(DarkBackgroundColor);
    canvas.roundedRectangle(0, 0, width(), height(), height() / 16);

    canvas.setColor(TextColor);

    const visage::Font font(height() / 4, resources::fonts::Lato_Regular_ttf);
    if (dragging_)
      canvas.text("Dragging " + filename_, font, visage::Font::kCenter, 0, 0, width(), height());
    else if (dropped_)
      canvas.text("Dropped " + filename_, font, visage::Font::kCenter, 0, 0, width(), height());
    else
      canvas.text("Drag destination", font, visage::Font::kCenter, 0, 0, width(), height());
  }

  bool receivesDragDropFiles() override { return true; }
  std::string dragDropFileExtensionRegex() override { return ".*"; }

  void dragFilesEnter(const std::vector<std::string>& paths) override {
    dragging_ = true;
    dropped_ = false;
    filename_ = visage::fileName(paths[0]);
    redraw();
  }

  void dragFilesExit() override {
    dragging_ = false;
    redraw();
  }

  void dropFiles(const std::vector<std::string>& paths) override {
    dragging_ = false;
    dropped_ = true;
    redraw();
  }

private:
  std::string filename_;
  bool dragging_ = false;
  bool dropped_ = false;
};

class DragDropExample : public visage::Frame {
public: