menu.c

Very very small GUI. Usefull for small system, without OS or small OS. Event driven, support user m

#include "GUI.h"
#include "Globalvars.h"
#include "pwin.h"
#include "guidebug.h"
#include "MainMenu.h"

//--------------------------------------------------
void DrawMenuItems(Pw_GC* gc, Pw_MENU* menu) {
 int x, y, dy, dw, itemW;
 int i;
// Pw_Coord w, h;
 Pw_Window* win;
 MENU_ITEM * itemrec;
 GUI_ConstString * s;
int Checked;
	win = Pw_GCGetWindow(gc);
//	Pw_WindowGetSize(win, &w, &h);
	dy = Pw_GCGetFontHeight(gc);
	x = 7;/*(Pw_WindowGetX(win) + 7);// & 0xFFF8; */
	if (menu->Title)
		y = 2*dy;
	else
		y = dy + dy/2;

	dw = Pw_WindowGetWidth(win) - 6;
	itemrec = menu->Items;	
	for (i = 0; i < menu->NumItems; i++) {
		if (i == menu->Selected) {
//			Pw_DrawGrayTextBackgr(gc, x-2, y-dy+Pw_GCGetFontDescent(gc), dw-4, dy);
			Pw_GCSetColor(gc, pw_white_pixel);			 	
			Pw_FillRect(gc, x-2, y-dy+Pw_GCGetFontDescent(gc), dw-4, dy);
			Pw_GCSetColor(gc, pw_black_pixel);			 	
		} 
		else {
			Pw_GCSetColor(gc, pw_black_pixel);			 	
			Pw_FillRect(gc, x-2, y-dy+Pw_GCGetFontDescent(gc), dw-4, dy);
			Pw_GCSetColor(gc, pw_white_pixel);			 	
		}
//		Pw_GCSetColor(gc, pw_white_pixel);			 	
		s = (GUI_ConstString *)itemrec->Item;
		Pw_DrawString(gc, x+4, y, (char *) s);
		itemW = Pw_GCGetStringWidth(gc, "OFF") + 8;
		if (itemrec->Toggled) {
			itemrec->OnSelection(&Checked);
			if (Checked) 
				Pw_DrawString(gc, x + dw - itemW, y, (char *) "ON");
			else
				Pw_DrawString(gc, x + dw - itemW, y, (char *) "OFF");
		}				
		itemrec++;
		y += dy;
	}
}

//-------------------------------------------------- 
void cbRepaintMenu (Pw_GC* gc) {
Pw_Window* win;
Pw_MENU * mnu;
Pw_Coord w, h;
   win = Pw_GCGetWindow(gc);
   Pw_WindowGetSize(win, &w, &h);
//GUI_Log3("Repeint ", (long) win, w, h);
   mnu = (Pw_MENU *) Pw_WindowGetClientData(win);
   Pw_GCSetFont(gc, mnu->Font); 
   Pw_DrawFrameRect(gc, 0, 0, w, h, 2, mnu->Title);
   DrawMenuItems(gc, mnu);
}

//--------------------------------------------------
int cbMenuEventHandler (Pw_Event* event) {
Pw_Window* win;
Pw_MENU * mnu;
Pw_MENU * sub_menu;
Pw_uInt key;
MENU_ITEM * item;

//GUI_Log("MENU CALLBACK");
	win = Pw_EventGetWindow(event); 
	mnu = Pw_WindowGetClientData(win);
	switch (Pw_EventGetType(event)) {
		case Pw_KeyPressEventType: 
			key = event->key.keycode;
			switch (key) {
				case DOWN_KEY :
					if (mnu->Selected < (mnu->NumItems-1)) {
					 	mnu->Selected++;
						Pw_WindowRepaint(win);	
//						GUI_Log1("Selected ", mnu->Selected);
						return TRUE;
					} 
					break;
				case UP_KEY :
					if (mnu->Selected > 0) {
					 	mnu->Selected--;
						Pw_WindowRepaint(win);	
//						GUI_Log1("Selected ", mnu->Selected);
						return TRUE;
					} 
					break;
				case ESC_KEY :
//				    GUI_Log1("Parent MENU ", (long)mnu->ParentMenu);
					if (mnu->ParentMenu) {
						Pw_WindowLeaveFocus(win);
						Pw_WindowUnmap(win);
						Pw_WindowMap(&(mnu->ParentMenu->mnuWin));
						Pw_WindowSetFocus(&(mnu->ParentMenu->mnuWin));
						Pw_WindowRepaint(Desktop);
						return TRUE;
					} 
					break;
				case ENTER_KEY :
					item = mnu->Items + mnu->Selected;
					sub_menu = item->SubMenu;
					if (sub_menu) {
						Pw_WindowMap(&(sub_menu->mnuWin));
						Pw_WindowSetFocus(&(sub_menu->mnuWin));
						return TRUE;
					}
					else {
						item = mnu->Items + mnu->Selected;
						if (!item->Toggled) {
							if (item->OnSelection != NULL) {
								item->OnSelection(NULL);
								return TRUE;  							  
							}
						}
						else {
								item->OnSelection(NULL);
								Pw_WindowRepaint(win);
						}
					}
					break;
			}
			break;
	}
	return FALSE;
}

//--------------------------------------------------
int CreateMenu (Pw_MENU * menu, Pw_MENU * Owner, Pw_Window* Parent, 
				const MENU_ITEM * ItemData, char * aTitle, int itemcnt,
				int x, int y, int w, int h){ 

	menu->Font = F9x15_pwf;
	menu->Title = aTitle;
	menu->NumItems = itemcnt;
	if (menu->Title)
		h = Pw_FontGetHeight(menu->Font) * (menu->NumItems + 2);
	else
		h = Pw_FontGetHeight(menu->Font) * (menu->NumItems + 1) + 4;

	Pw_WindowCreate(Parent, x, y, w, h, &menu->mnuWin);	
	Pw_WindowSetClientData(&(menu->mnuWin), menu);				 
    Pw_WindowSetRepaintCallback(&(menu->mnuWin), cbRepaintMenu);
	Pw_WindowSetEventCallback(&(menu->mnuWin), cbMenuEventHandler);
	menu->ParentMenu = Owner;
	menu->Items = ItemData;
	menu->Selected = 0;	
//	Pw_WindowMap(&(menu->mnuWin));
    Pw_WindowSetFocusAccept(&(menu->mnuWin), TRUE);
	return TRUE;
} 
/*
void SetToggleItemMenu (Pw_MENU * menu, int item) {
	menu->IsToggle = TRUE;
	if (menu->Items->OnSelection != NULL)
		menu->Items->OnSelection(&(menu->Checked)); 
}
				   */