code_twain/sane/DlgPage.h

#pragma once

#include <Windows.h>
#include <CommCtrl.h>
#include <string>
#include <vector>
#include <sane/sane_ex.h>
#include <sane/sane_option_definitions.h>

// CDlgIndicator 对话框
#define RECT_W(r)			(r.right - r.left)
#define RECT_H(r)			(r.bottom - r.top)
#define WM_REFRESH_OPTION	WM_USER + 111		// WPARAM: source option SN, LPARAM: unused now
#define WM_GET_CONFIG_OBJ	WM_USER + 112		// WPARAM: not use, LPARAM: to receive the gb::sane_config* object


extern HMODULE	g_my_inst;
namespace gb
{
	class sane_config;
}

class dlg_base
{
protected:
	HWND	hwnd_;
	HWND	parent_;
	UINT	idd_;
	void(__stdcall* ui_event_notify_)(int uev, void* sender, void* param);
	void*	ui_notify_param_;
	static std::wstring prop_name;
	static BOOL CALLBACK dlg_proc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp);

	virtual BOOL handle_message(UINT msg, WPARAM wp, LPARAM lp);
	virtual void on_font_changed(void);
	void create(void);
	void notify_ui_event(int ev);
	gb::sane_config* get_config(void);

public:
	dlg_base(HWND parent, UINT idd);
	virtual ~dlg_base();

	static bool get_max_size(SIZE& dst, const SIZE& src);	// return whether changed dst
	static bool get_max_size(SIZE& dst, int cx, int cy);	// return whether changed dst

public:
	void set_ui_event_notify(void(__stdcall* notify)(int, void*, void*), void* param);
	HWND hwnd(void);
	void show(bool visible);
	void enable(bool enable);
	void screen_2_client(LPRECT r);
	void client_2_screen(LPRECT r);
	HWND get_item(UINT id);
	BOOL set_font(HFONT font);
	HFONT get_font(void);
	int get_string_width(const wchar_t* str);
};

class dlg_page : public dlg_base
{
	std::wstring	name_;
	SIZE			size_;
	UINT			ctrl_id_;
	POINT			pos_;
	SANEAPI			sane_;
	SANE_Handle		dev_;
	bool			done_;
	std::vector<HWND>	ctrls_;

	int				id_dpi_;
	float			dpi_;
	int				id_paper_;
	std::wstring	paper_;

	int				id_custom_area_;
	int				id_custom_left_;
	int				id_custom_right_;
	int				id_custom_top_;
	int				id_custom_bottom_;
	int				id_custom_gamma_;

	static std::wstring	property_type;
	static std::wstring	property_host;
	static std::wstring	property_size;
	static UINT		dyn_id_base;
	static int		gap_x;
	static int		gap_y;
	static int		spin_w;


	BOOL handle_message(UINT msg, WPARAM wp, LPARAM lp) override;
	void on_font_changed(void) override;

	HWND create_label(int sn, const wchar_t* title, int x, int y, SIZE size);
	HWND create_slider(int sn, int x, int y, double lower, double upper, double step, double pos, LPSIZE size, bool is_double);
	HWND create_edit(int sn, int x, int y, int h, int w = 50);
	HWND create_combox(int sn, int x, int y, std::vector<std::wstring>& vals, const wchar_t* cur_val, LPSIZE size);
	HWND create_spin(int sn, HWND edit, double pos, double lower, double upper, bool is_double);

	HWND create_control_bool(int sn, const SANE_Option_Descriptor* desc, void* cur_val, const wchar_t* title, LPSIZE text_size);
	HWND create_control_int(int sn, const SANE_Option_Descriptor* desc, void* cur_val, const wchar_t* title, LPSIZE text_size);
	HWND create_control_float(int sn, const SANE_Option_Descriptor* desc, void* cur_val, const wchar_t* title, LPSIZE text_size);
	HWND create_control_string(int sn, const SANE_Option_Descriptor* desc, void* cur_val, const wchar_t* title, LPSIZE text_size);
	HWND create_control_button(int sn, const SANE_Option_Descriptor* desc, void* cur_val, const wchar_t* title, LPSIZE text_size);

	void handle_command(WORD code, WORD id, HANDLE ctrl);
	BOOL on_notify(int ctrl_id, LPNMHDR pnmh);

	void* value_from_ctrl(HWND ctrl, SANE_Value_Type* type);	// call free_ctrl_value to free the returned value, data according to SANE-standard
	void set_ctrl_value(HWND ctrl, SANE_Value_Type type, void* val, bool only_me, bool skip_ctrl = false);
	void free_ctrl_value(void* val);
	int find_control_ind(HWND wnd);
	void control_action(HWND wnd);
	BOOL on_mouse_wheel(WORD vkey, short delta, short x, short y);

public:
	dlg_page(HWND parent, const wchar_t* name, LPSANEAPI api, SANE_Handle dev);
	~dlg_page();

public:
	bool add_control(int sn, const SANE_Option_Descriptor* desc, void* cur_val);
	void add_control_done(void);
	SIZE desired_size(void);
	void show(void);
	void hide(void);
	bool refresh(int sn, const SANE_Option_Descriptor* desc, void* cur_val);
	const wchar_t* name(void);
};