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From: Sahab Yazdani <sahaby AT operamail DOT com>
Organization: PheonixSoft Interactive
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Subject: Re: the follies of new...
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Date: Sun, 18 Mar 2001 20:31:47 -0500
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here is the source code for the offending module (as symify sees it)
the Class GLinearBitmap works fine, as I have debugged it to death.

-- 
***********************************************************
* Sahab Yazdani * "Wizard's Third Rule: Passion rules     *
* Thornhill S.S * Reason" - Kolo's Journal                *
***********************************************************
* http://pheonixsoft.virtualave.net/                      *
***********************************************************

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// Homebase Version 1.0
// Graphical Percentage Bar Widget
// By: Sahab Yazdani

#include <stdlib.h>
#include <stdio.h>

#include "e:/djgpp/contrib/grfx2/h/linbitmp.h"
#include "perslide.h"

static int PercentageOf( int per, int max ) {
	double temp;
   int num;

   temp = ((double)(per))/100;
   temp = temp * ((double)(max)); // Get Percentage of...
   num = ((int)(temp));

   return num;
}

static int Percentage( int num, int max ) {
	double temp;

   temp = ((double)(num))/(double)((max));
   temp = temp * 100;

   return ((int)(temp));
}

PercentageSlider::PercentageSlider() {
	draw=NULL;
	backdrop=NULL;

	range = GPoint( 0, 0 );
	curPercent=0;
	region = GRect( 0, 0, 0, 0 );
	colourA = GRGB( 0, 0, 0 );
	colourB = GRGB( 0, 0, 0 );
}

PercentageSlider::PercentageSlider( GRect region, GLinearBitmap *target, GRGB colourA, GRGB colourB, GPoint range ) {
	PercentageSlider::region = region;

	backdrop = new GLinearBitmap( region.length, region.width, target->GetBitDepth() );
	backdrop->Clip( GPoint( region.x, region.y ), target );

	draw = new GLinearBitmap( region.length, region.width, target->GetBitDepth() );
   fprintf( stderr, "draw[oninit]: 0x%x\n", draw );
   
	curPercent=0;

	PercentageSlider::colourA = colourA;
	PercentageSlider::colourB = colourB;
	PercentageSlider::range = range;
}

PercentageSlider::~PercentageSlider() {
	fprintf( stderr, "draw[ondestruct]: 0x%x\n", draw );
   fprintf( stderr, "draw->virtualPtr: 0x%x\n", draw->GetVirtualPointer() );
   
	if ( draw!=NULL )	delete draw;
	if ( backdrop!=NULL ) delete backdrop;
}

GRGB PercentageSlider::CalcStep( int curPer, int totalStep ) {
   long RDelta;
   long GDelta;
   long BDelta;

	RDelta = colourB.red - colourA.red;
   RDelta = (RDelta * curPer) / totalStep;
	
	GDelta = colourB.green - colourA.green;
   GDelta = (GDelta * curPer) / totalStep;

	BDelta = colourB.blue - colourA.blue;
   BDelta = (BDelta * curPer) / totalStep;

   return GRGB( ( colourA.red + (unsigned char) RDelta ) ,
      						( colourA.green + (unsigned char) GDelta ),
                        ( colourA.blue + (unsigned char) BDelta ) );
}

void PercentageSlider::UpdateBasedonMouse( GPoint location ) {
	int relative;

   relative = location.x - region.x; // Relative to box
	SetPercentage( Percentage( relative, region.length ) );
}

void PercentageSlider::ChangeBackdrop( GLinearBitmap *target ) {
	backdrop->Clip( GPoint( region.x, region.y ), target );
}

void PercentageSlider::Draw( GLinearBitmap *target ) {
	backdrop->Draw( GPoint( 0, 0 ), draw );

	for( int c=0;c<PercentageOf( curPercent, region.length );c++ )
		draw->Line( GPoint( c, 0 ), GPoint( c, region.width-1 ), CalcStep( c, region.length ) );

	draw->Draw( GPoint( region.x, region.y ), target );
}

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