viewport.c

myTemp is used to connect PalmOS PDAs to Dallas Microlan(tm) Devices. It currently supports DS1820

#include <PalmOS.h>
#include "com.h"
#include "viewport.h"
#include "log.h"

UInt32	scaleX;
Int16	scaleY;
UInt32	offX;
Int16	offY;
UInt32	offsetX;
Int16	offsetY;
RectangleType	bounds;

void ViewportInit(ViewPortData viewport)
{
	FormType*		frm = viewport.frm;
	UInt16			gadgetID = viewport.gadgetID;
	UInt16			gadgetIndex = FrmGetObjectIndex(frm, gadgetID);
	FrmGetObjectBounds(frm, gadgetIndex, &bounds);
	
	scaleX =  ((viewport.maxX - viewport.offsetX) / (bounds.extent.x)) + 1;
	scaleY = ((viewport.maxY - viewport.offsetY) / (bounds.extent.y)) + 1 ;
	offX = bounds.topLeft.x;
	offY = bounds.topLeft.y;
	offsetX = viewport.offsetX;
	offsetY = viewport.offsetY;
	WinDrawRectangleFrame(simpleFrame, &bounds);
}

void ViewportDraw(void)
{
	LogEntryT	entry;
	UInt16	num;
	UInt16	i;
	UInt16 j;
	RectangleType	rectangle;
	
	rectangle.topLeft.x = bounds.topLeft.x + 1;
	rectangle.topLeft.y = bounds.topLeft.y + 1;
	rectangle.extent.x = bounds.extent.x - 1;
	rectangle.extent.y = bounds.extent.y - 1;
	
	WinEraseRectangle(&rectangle, 0);
	
	for (j = 0; j < LogGetNumRecords(logDb); j++)
	{
		num = LogGetNumEntries(logDb, j);
		for (i = 0; i < num; i++)
		{
			LogGetEntry(logDb, j, i, &entry);
			entry.time =entry.time;
			rectangle.topLeft.x = ((entry.time - offsetX)) / scaleX + offX;
			rectangle.topLeft.y = bounds.extent.y - ((entry.temp - offsetY)) / scaleY + offY - 1;
			rectangle.extent.x = 2;
			rectangle.extent.y = 2;
			WinDrawRectangle(&rectangle, 2);
		}
	}
}