/*
 * xmView.h
 *
 *  Created on: Mar 21, 2017
 *      Author: chuck
 */

#ifndef XMVIEW_H_
#define XMVIEW_H_

#include 
#include 

#define WIDTH 3200
#define HEIGHT 3200

Pixmap viewPixmap;

Boolean gotViewPixmap;

Widget viewArea;

void drawPixmap(String fileName);

void viewAreaCB(Widget widget, XtPointer clientData, XtPointer callData);

void viewAreaExpose(XmDrawingAreaCallbackStruct *cbs);

void viewAreaResize(XmDrawingAreaCallbackStruct *cbs);

void viewAreaInput(XmDrawingAreaCallbackStruct *cbs);

void loadView(Widget parent);

#endif /* XMVIEW_H_ */

/*
 * xmView.c
 *
 *  Created on: Mar 21, 2017
 *      Author: chuck
 */

#include 

#include "xmView.h"

/****  ****/
void drawPixmap(String fileName) {
	//
	Pixel fg, bg;

	//printf("view callDataType = expose\n");

	if (gotViewPixmap != True) {

		bg = 0;			/* black background */
		fg = 9777215;	/* dark red foreground */

		printf("fg = %d, bg = %d\n", (int)fg, (int)bg);

		viewPixmap = XmGetPixmap(XtScreen(viewArea), fileName, fg, bg);

		gotViewPixmap = True;

	}

	XCopyArea(XtDisplay(viewArea), viewPixmap, XtWindow(viewArea),
				XDefaultGCOfScreen(XtScreen(viewArea)), 0, 0, WIDTH, HEIGHT, 0, 0);

	return;
}


/****  ****/
void viewAreaExpose(XmDrawingAreaCallbackStruct *cbs) {
	//
	printf("view callDataType = expose\n");
	//window = cbs->window;
	drawPixmap("src/X11/bitmaps/xlogo64");
	//
}

/****  ****/
void viewAreaResize(XmDrawingAreaCallbackStruct *cbs) {
	//
	printf("view callDataType = resize\n");
	//
}


/****  ****/
void viewAreaInput(XmDrawingAreaCallbackStruct *cbs) {
	//
	XEvent *event = cbs->event;
	Position x = event->xbutton.x;
	Position y = event->xbutton.y;
	printf("view callDataType = input at %d, %d\n", x, y);
	//
}


/****  ****/
void viewAreaCB(Widget widget, XtPointer clientData, XtPointer callData) {
	//
	XmDrawingAreaCallbackStruct *cbs = (XmDrawingAreaCallbackStruct *)callData;
	int reason = cbs->reason;
	switch(reason) {
		case XmCR_EXPOSE:
			viewAreaExpose(cbs);
			break;
		case XmCR_RESIZE:
			viewAreaResize(cbs);
			break;
		case XmCR_INPUT:
			viewAreaInput(cbs);
			break;
	}
}

/****  ****/
void loadView(Widget parent) {
	//
	viewArea = XtVaCreateManagedWidget("drawArea",
		xmDrawingAreaWidgetClass, parent,
		XmNbackground, 0,
		XmNwidth, WIDTH,
		XmNheight, HEIGHT,
		NULL);

	XtAddCallback(viewArea, XmNexposeCallback, viewAreaCB, NULL);
	XtAddCallback(viewArea, XmNresizeCallback, viewAreaCB, NULL);
	XtAddCallback(viewArea, XmNinputCallback, viewAreaCB, NULL);

}