source/container.h

   1 #ifndef MSP_GLTK_CONTAINER_H_
   2 #define MSP_GLTK_CONTAINER_H_
   3
   4 #include <memory>
   5 #include <stdexcept>
   6 #include <vector>
   7 #include <sigc++/trackable.h>
   8 #include "mspgltk_api.h"
   9 #include "widget.h"
  10
  11 namespace Msp {
  12 namespace GLtk {
  13
  14 class MSPGLTK_API hierarchy_error: public std::logic_error
  15 {
  16 public:
  17         hierarchy_error(const std::string &);
  18 };
  19
  20
  21 class MSPGLTK_API Container: virtual public Widget
  22 {
  23 protected:
  24         struct Child: public sigc::trackable
  25         {
  26                 Container &container;
  27                 Widget *widget = nullptr;
  28                 Time::TimeDelta time_since_animate;
  29
  30                 Child(Container &, Widget *);
  31                 virtual ~Child();
  32
  33                 void visibility_changed(bool);
  34                 void request_focus();
  35                 void grab_pointer();
  36                 void ungrab_pointer();
  37                 void request_animation(const Time::TimeDelta &);
  38                 void rebuild_needed();
  39         };
  40
  41         std::vector<std::unique_ptr<Child>> children;
  42         Widget *click_focus = nullptr;
  43         unsigned click_button = 0;
  44         Widget *pointer_focus = nullptr;
  45         bool pointer_grabbed = false;
  46         Widget *input_focus = nullptr;
  47         Widget *saved_input_focus = nullptr;
  48         Widget *touch_focus = nullptr;
  49         bool children_rebuild_needed = false;
  50
  51         Container() = default;
  52 public:
  53         virtual ~Container();
  54
  55         void add(Widget &);
  56         void remove(Widget &);
  57 protected:
  58         Geometry determine_child_geometry(const Widget &, const Part &) const;
  59         void autosize_child(const Widget &, const Part &, Geometry &) const;
  60         void reposition_child(Widget &, const Part &) const;
  61 public:
  62         std::vector<Widget *> get_children() const;
  63         Widget *find_child_at(int, int) const;
  64         Widget *find_descendant_at(int, int) const;
  65         void raise(Widget &);
  66
  67 protected:
  68         void set_pointer_focus(Widget *, bool = false);
  69         void set_input_focus(Widget *);
  70 public:
  71         Widget *get_input_focus() const { return input_focus; }
  72         Widget *get_final_input_focus() const;
  73
  74 private:
  75         void check_animation_interval();
  76
  77 protected:
  78         void rebuild_hierarchy() override;
  79
  80 public:
  81         void button_press(int, int, unsigned) override;
  82         void button_release(int, int, unsigned) override;
  83         void pointer_motion(int, int) override;
  84 private:
  85         Widget *get_pointer_target(int, int, bool) const;
  86 public:
  87         void pointer_leave() override;
  88         void touch_press(int, int, unsigned) override;
  89         void touch_release(int, int, unsigned) override;
  90         void touch_motion(int, int, unsigned) override;
  91         bool key_press(unsigned, unsigned) override;
  92         bool key_release(unsigned, unsigned) override;
  93         bool character(wchar_t) override;
  94         void focus_in() override;
  95         void focus_out() override;
  96         bool navigate(Navigation) override;
  97         void animate(const Time::TimeDelta &) override;
  98 protected:
  99         void on_reparent() override;
 100         virtual void on_child_added(Widget &) { }
 101         virtual void on_child_removed(Widget &) { }
 102         virtual void on_input_focus_changed(Widget *);
 103 };
 104
 105 } // namespace GLtk
 106 } // namespace Msp
 107
 108 #endif