Add zwidget

libraries/ZWidget/include/zwidget/widgets/scrollbar/scrollbar.h

@@ -0,0 +1,97 @@
+
+#pragma once
+
+#include "../../core/widget.h"
+#include "../../core/timer.h"
+#include <functional>
+
+class Scrollbar : public Widget
+{
+public:
+	Scrollbar(Widget* parent);
+	~Scrollbar();
+
+	bool IsVertical() const;
+	bool IsHorizontal() const;
+	int GetMin() const;
+	int GetMax() const;
+	int GetLineStep() const;
+	int GetPageStep() const;
+	int GetPosition() const;
+
+	void SetVertical();
+	void SetHorizontal();
+
+	void SetMin(int scroll_min);
+	void SetMax(int scroll_max);
+	void SetLineStep(int step);
+	void SetPageStep(int step);
+
+	void SetRanges(int scroll_min, int scroll_max, int line_step, int page_step);
+	void SetRanges(int view_size, int total_size);
+
+	void SetPosition(int pos);
+
+	std::function<void()> FuncScroll;
+	std::function<void()> FuncScrollMin;
+	std::function<void()> FuncScrollMax;
+	std::function<void()> FuncScrollLineDecrement;
+	std::function<void()> FuncScrollLineIncrement;
+	std::function<void()> FuncScrollPageDecrement;
+	std::function<void()> FuncScrollPageIncrement;
+	std::function<void()> FuncScrollThumbRelease;
+	std::function<void()> FuncScrollThumbTrack;
+	std::function<void()> FuncScrollEnd;
+
+protected:
+	void OnMouseMove(const Point& pos) override;
+	void OnMouseDown(const Point& pos, int key) override;
+	void OnMouseUp(const Point& pos, int key) override;
+	void OnMouseLeave() override;
+	void OnPaint(Canvas* canvas) override;
+	void OnEnableChanged() override;
+	void OnGeometryChanged() override;
+
+private:
+	bool UpdatePartPositions();
+	int CalculateThumbSize(int track_size);
+	int CalculateThumbPosition(int thumb_size, int track_size);
+	Rect CreateRect(int start, int end);
+	void InvokeScrollEvent(std::function<void()>* event_ptr);
+	void OnTimerExpired();
+
+	bool vertical = false;
+	int scroll_min = 0;
+	int scroll_max = 1;
+	int line_step = 1;
+	int page_step = 10;
+	int position = 0;
+
+	enum MouseDownMode
+	{
+		mouse_down_none,
+		mouse_down_button_decr,
+		mouse_down_button_incr,
+		mouse_down_track_decr,
+		mouse_down_track_incr,
+		mouse_down_thumb_drag
+	} mouse_down_mode = mouse_down_none;
+
+	int thumb_start_position = 0;
+	Point mouse_drag_start_pos;
+	int thumb_start_pixel_position = 0;
+
+	Timer* mouse_down_timer = nullptr;
+	int last_step_size = 0;
+
+	Rect rect_button_decrement;
+	Rect rect_track_decrement;
+	Rect rect_thumb;
+	Rect rect_track_increment;
+	Rect rect_button_increment;
+
+	std::function<void()>* FuncScrollOnMouseDown = nullptr;
+
+	static const int decr_height = 16;
+	static const int incr_height = 16;
+};