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/*
* $Id: VXImage.c 3177 2008-04-01 14:47:24Z karstenm $
*
* This file contains VX image display routines.
*/
/*
* Copyright 1993, 1994 University of British Columbia
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appears in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. UBC makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* Author: Daniel Ko, UBC Laboratory for Computational Intelligence
*/
/* From the Vista library: */
#include "viaio/Vlib.h"
#include "viaio/mu.h"
#include "viaio/os.h"
#include "viaio/VImage.h"
#include "viaio/VImageView.h"
#include "viaio/VX.h"
#include "viaio/VXPrivate.h"
/* From X11R5 Xt and Motif: */
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <Xm/Xm.h>
/* File identification string: */
VRcsId ("$Id: VXImage.c 3177 2008-04-01 14:47:24Z karstenm $");
/*
* Extern: VX_Zoomed
*
* Handle the ZoomIn, ZoomOut, and MoveZoomCenter actions of
* VX_App.x.imageView.
*/
extern void VX_Zoomed (Widget w, XtPointer client_data, XtPointer call_data)
{
int zoom_level;
if (VX_App.v.image == NULL)
return;
/* Get the new zoom level: */
XtVaGetValues (w, VxNzoomLevel, & zoom_level, (char *) NULL);
VX_App.v.zoom_level = zoom_level / 100.0f;
/* Overlays pixmap is no longer consistent: */
VX_App.o.pixmap_consistent = FALSE;
/* Calculate row scale: */
VX_App.v.row_scale = (float) VX_App.x.cur_height /
VImageNRows (VX_App.v.image) * VX_App.v.zoom_level;
}
/*
* VXSetImage
*
* Set the region of the image to be displayed.
*/
VBoolean VXSetImage (VImage image, VBand band, double zoom_level,
int row_center, int column_center)
{
int width, height;
if (! VX_App.initialized)
VError ("VXSetImage: VX not initialized");
/* Check for NULL image: */
if (image == NULL) {
VWarning ("VXSetImage: Cannot set NULL image");
return FALSE;
}
/* Validate zoom_level: */
if (zoom_level < 1.0) {
VWarning ("VXSetImage: Zoom level less than 1");
return FALSE;
}
/* Display busy cursor: */
if (XtIsRealized (VX_App.x.imageView) == TRUE)
XMapWindow (XtDisplay(VX_App.x.topLevel), VX_App.x.busyWindow);
XSync (XtDisplay(VX_App.x.topLevel), FALSE);
/* Overlays pixmap is no longer consistent: */
VX_App.o.pixmap_consistent = FALSE;
/* Store the image and band number: */
VX_App.v.image = image;
VX_App.v.band = band;
VX_App.v.zoom_level = zoom_level;
/* Determine new size of imageView widget: */
/* New bounding box cannot be smaller than initial size
of the imageView widget: */
width = VMax (VX_App.x.init_width, VX_App.x.cur_width);
height = VMax (VX_App.x.init_height, VX_App.x.cur_height);
/* Determine new size of the imageViewWidget: */
VImageWindowSize (VX_App.v.image, width, height,
&VX_App.x.cur_width, &VX_App.x.cur_height);
/* Calculate row scale: */
VX_App.v.row_scale = (float) VX_App.x.cur_height /
VImageNRows (VX_App.v.image) * VX_App.v.zoom_level;
/* Set the new image and current dimensions: */
XtVSV (VX_App.x.imageView,
VxNimage, VX_App.v.image,
VxNband, band,
VxNrowCenter, row_center,
VxNcolumnCenter, column_center,
VxNzoomLevel, (int) (zoom_level * 100.0),
XmNwidth, (Dimension) VX_App.x.cur_width,
XmNheight, (Dimension) VX_App.x.cur_height, (char *) NULL);
/* Assumed that the width and height are honored. */
/* Hide busy cursor: */
if (XtIsRealized (VX_App.x.imageView) == TRUE)
XUnmapWindow (XtDisplay(VX_App.x.topLevel), VX_App.x.busyWindow);
return TRUE;
}
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