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/************************************************************************/
/* */
/* Manage a zoom menu. */
/* */
/************************************************************************/
# include "appFrameConfig.h"
# include <stddef.h>
# include <stdlib.h>
# include <stdio.h>
# include <ctype.h>
# define y0 math_y0
# define y1 math_y1
# include <math.h>
# undef y0
# undef y1
# include <appFrame.h>
# include <appZoomMenu.h>
# include <appDebugon.h>
/************************************************************************/
/* */
/* Normalize a zoom factor. */
/* */
/************************************************************************/
static double appZoomFactor( int logs2mag )
{
if ( logs2mag == 0 )
{ return 1.0; }
if ( logs2mag > 0 )
{ return pow( sqrt( 2.0 ), (double)logs2mag ); }
else{ return 1.0/ pow( sqrt( 2.0 ), -(double)logs2mag ); }
}
/************************************************************************/
/* */
/* Adapt the zoom menu to the current factor. */
/* */
/************************************************************************/
void appUpdateZoomMenu( APP_WIDGET menu,
APP_WIDGET * options,
int optionCount,
int logs2mag )
{
int i;
for ( i= 0; i < optionCount; i++ )
{
char scratch[40];
sprintf( scratch, "%6.0f %%",
100.0 * appZoomFactor( logs2mag+ i - optionCount/ 2 ) );
appGuiSetToggleItemLabel( options[i], scratch );
appGuiSetToggleItemState( options[i], i == optionCount/ 2 );
}
}
/************************************************************************/
/* */
/* The user has chosen another magnification: */
/* */
/************************************************************************/
void appZoomChangeFactor( APP_WIDGET option,
APP_WIDGET menu,
APP_WIDGET * options,
int optionCount,
int * pLogSqrt2Magnification,
double * pMagnification,
DocumentRectangle * drSelected,
DocumentRectangle * drCut )
{
short num= -1;
double magStep;
for ( num= 0; num < optionCount; num++ )
{
if ( options[num] == option )
{ break; }
}
if ( num < 0 || num >= optionCount )
{ LDEB(num); return; }
if ( num == optionCount/2 )
{ return; }
*pLogSqrt2Magnification += num- optionCount/2;
magStep= appZoomFactor( *pLogSqrt2Magnification )/ *pMagnification;
*pMagnification= appZoomFactor( *pLogSqrt2Magnification );
appUpdateZoomMenu( menu, options, optionCount, *pLogSqrt2Magnification );
if ( drSelected )
{
if ( drSelected->drX0 >= 0 )
{ drSelected->drX0 *= magStep; }
if ( drSelected->drX1 >= 0 )
{ drSelected->drX1 *= magStep; }
if ( drSelected->drY0 >= 0 )
{ drSelected->drY0 *= magStep; }
if ( drSelected->drY1 >= 0 )
{ drSelected->drY1 *= magStep; }
}
if ( drCut )
{
if ( drCut->drX0 >= 0 )
{ drCut->drX0 *= magStep; }
if ( drCut->drX1 >= 0 )
{ drCut->drX1 *= magStep; }
if ( drCut->drY0 >= 0 )
{ drCut->drY0 *= magStep; }
if ( drCut->drY1 >= 0 )
{ drCut->drY1 *= magStep; }
}
return;
}
/************************************************************************/
/* */
/* Make a zoom menu. */
/* */
/************************************************************************/
void appMakeZoomMenu( EditApplication * ea,
EditDocument * ed,
APP_WIDGET * pZoomMenu,
APP_WIDGET menubar,
int logSqrt2Magnification,
const char * zoomText,
AppMenuItem * optionItems,
APP_WIDGET * options,
int optionCount )
{
int i;
APP_WIDGET menu;
APP_WIDGET button;
for ( i= 1; i < optionCount; i++ )
{
optionItems[i]= optionItems[0];
optionItems[i].amiItemType= ITEMtyTOGGLE_OFF;
}
optionItems[optionCount/2].amiItemType= ITEMtyTOGGLE_ON;
menu= appMakeMenu( &button, &(ed->edToplevel), ea, menubar,
zoomText, 0, optionItems, optionCount, (void *)ed );
for ( i= 0; i < optionCount; i++ )
{ options[i]= optionItems[i].amiOptionWidget; }
*pZoomMenu= menu;
appUpdateZoomMenu( menu, options, optionCount, logSqrt2Magnification );
return;
}
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