design_fit_view.hpp

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#pragma once
 
#include <pulp/view/view.hpp>
 
#include <memory>
 
namespace pulp::view {

class DesignFitView : public View {
public:
    DesignFitView();
    ~DesignFitView() override;

    std::unique_ptr<View> set_content(std::unique_ptr<View> content);
    View* content() const { return content_; }
    std::unique_ptr<View> take_content();

    void set_design_size(float w, float h);
    float design_width() const { return design_w_; }
    float design_height() const { return design_h_; }

    void set_allow_upscale(bool allow);
    bool allow_upscale() const { return allow_upscale_; }

    void set_top_align(bool top_align);
    bool top_align() const { return top_align_; }

    float fit_scale() const { return fit_scale_; }
    float content_offset_x() const { return offset_x_; }
    float content_offset_y() const { return offset_y_; }
 
    bool owns_child_layout() const override { return true; }
    void layout_children() override;
    View* hit_test(Point local_point) override;
 
private:
    bool resolve_design_size(float& w, float& h) const;
 
    View* content_ = nullptr;
    float design_w_ = 0.0f;
    float design_h_ = 0.0f;
    bool allow_upscale_ = false;
    bool top_align_ = false;
 
    float fit_scale_ = 1.0f;
    float offset_x_ = 0.0f;
    float offset_y_ = 0.0f;
};
 
}  // namespace pulp::view