#include "pch.h"
#include "ui.h"

#include "huagaotwain.h"	// for sane_invoker::load_dll


twain_ui::twain_ui(const wchar_t* path) : path_(path), dll_(NULL)
				, show_(NULL), hide_(NULL), event_(NULL), hui_(NULL)
				, good_(false)
{
	good_ = load();
}
twain_ui::~twain_ui()
{
	if (hui_ && hide_)
		hide_(hui_);

	if (dll_)
		FreeLibrary(dll_);
}

bool twain_ui::load()
{
	std::wstring	dll(path_ + L"\\huagaoui.dll");

	sane_invoker::load_dll(dll.c_str(), &dll_);
	if (!dll_)
		return false;

	show_ = (ui_show_api)GetProcAddress(dll_, "ui_show");
	hide_ = (ui_hide_api)GetProcAddress(dll_, "ui_hide");
	event_ = (handle_event_api)GetProcAddress(dll_, "handle_event");

	return show_ && hide_ && event_;
}

void twain_ui::show_main_ui(LPSANEAPI api)
{
	type_ = UITYPE::UI_MAIN;
	if (show_)
		hui_ = show_(UITYPE::UI_MAIN, api);
}
void twain_ui::show_setting_ui(LPSANEAPI api, bool with_scan)
{
	if (show_)
	{
		type_ = with_scan ? UITYPE::UI_SETTING_AND_SCAN : UITYPE::UI_SETTING;
		hui_ = show_(type_, api);
	}
}
void twain_ui::show_progress_ui(LPSANEAPI api)
{
	type_ = UITYPE::UI_PROGRESS;
	if (show_)
		hui_ = show_(UITYPE::UI_PROGRESS, api);
}
void twain_ui::hide_ui(void)
{
	if (hui_ && hide_)
		hide_(hui_);
	hui_ = NULL;
}
void twain_ui::handle_sane_event(int sane_ev, void* data, unsigned int* len)
{
	if (event_)
		event_((SANE_Event)sane_ev, data, len);
}

bool twain_ui::is_ok(void)
{
	return good_;
}

bool twain_ui::is_progress_ui_showing(void)
{
	return type_ == UITYPE::UI_PROGRESS;
}