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/* Copyright INRIA */
#include <X11/StringDefs.h>
#include <X11/IntrinsicP.h>
#include <X11/Xaw3d/ViewportP.h>
#include "metaconst.h"
#include "metawin.h"
void SetBar(w, top, length, total)
Widget w;
Position top;
Dimension length, total;
{
XawScrollbarSetThumb(w, (float) top / (float) total,
(float) length / (float) total );
}
void RedrawThumbs(w)
ViewportWidget w;
{
register Widget child = w->viewport.child;
register Widget clip = w->viewport.clip;
if (w->viewport.horiz_bar)
SetBar( w->viewport.horiz_bar, -(child->core.x),
clip->core.width, child->core.width );
if (w->viewport.vert_bar)
SetBar( w->viewport.vert_bar, -(child->core.y),
clip->core.height, child->core.height );
}
void MoveChild(w, x, y)
ViewportWidget w;
Position x, y;
{
register Widget child = w->viewport.child;
register Widget clip = w->viewport.clip;
/* make sure we never move past right/bottom borders */
if ((int) (x + clip->core.width) > (int) child->core.width)
x = child->core.width - clip->core.width;
if ((int) (y + clip->core.height) > (int ) child->core.height)
y = child->core.height - clip->core.height;
/* make sure we never move past left/top borders */
if (x < 0) x = 0;
if (y < 0) y = 0;
XtMoveWidget(child, - x, - y);
RedrawThumbs(w);
}
void GetDrawGeometry(x,y,w,h)
int *x,*y,*w,*h;
{
ViewportWidget vw;
register Widget child;
register Widget clip;
Arg arglist[2];
Position dx,dy;
vw = (ViewportWidget)drawViewport;
child = vw->viewport.child;
clip = vw->viewport.clip;
arglist[0].name = XtNx;
arglist[0].value = (XtArgVal)&dx;
arglist[1].name = XtNy;
arglist[1].value = (XtArgVal)&dy;
XtGetValues(child,arglist,2);
*x = - dx;
*y = - dy;
*w = clip->core.width;
*h = clip->core.height;
}
void CenterDraw(x,y)
int x, y;
{
int dx,dy,w,h;
GetDrawGeometry(&dx,&dy,&w,&h);
MoveChild((ViewportWidget)drawViewport,
(int)(metaScale*x) - w/2,(int)(metaScale*y) - h/2);
}
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