215 lines
6.2 KiB
C
215 lines
6.2 KiB
C
/* $XConsortium: Resize.c /main/5 1995/10/26 12:31:25 rswiston $ */
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/************************************<+>*************************************
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****************************************************************************
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**
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** File: Resize.c
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**
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** Project: Display Area Library
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**
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** Description: This body of code handles direct resize requests from
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** the GUI.
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**
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** (c) Copyright 1987, 1988, 1989, 1990, 1991, 1992 Hewlett-Packard Company
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**
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** (c) Copyright 1993, 1994 Hewlett-Packard Company
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** (c) Copyright 1993, 1994 International Business Machines Corp.
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** (c) Copyright 1993, 1994 Sun Microsystems, Inc.
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** (c) Copyright 1993, 1994 Novell, Inc.
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**
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**
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****************************************************************************
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************************************<+>*************************************/
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/*
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* system includes
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*/
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/*
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* private includes
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*/
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#include "DisplayAreaP.h"
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#include "CallbacksI.h"
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#include "ResizeI.h"
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#include "SetListI.h"
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#include "XUICreateI.h"
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#ifdef NLS16
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#endif
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/******** Private Function Declarations ********/
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/******** End Private Function Declarations ********/
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/******** Private Variables ********/
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/******** End Private Variables ********/
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/*********************************************************************
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* Private Functions
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*********************************************************************/
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/*********************************************************************
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* Public Functions
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*********************************************************************/
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/*********************************************************************
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* Function: ResizeDisplayArea
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*
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* ResizeDisplayArea resizes the Display Area and re-formats the
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* text based on a row and column values given.
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*
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*********************************************************************/
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void
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_DtHelpResizeDisplayArea (
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Widget parent,
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XtPointer client_data,
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int rows,
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int columns )
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{
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int count = 0;
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register int n;
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unsigned long char_width;
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Arg args[5];
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Dimension newWidth;
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Dimension newHeight;
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Dimension vertWidth = 0;
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Dimension horzHeight = 0;
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Dimension tstWidth;
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Dimension tstHeight;
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Dimension oldWidth;
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Dimension oldHeight;
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XEvent event;
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XmDrawnButtonCallbackStruct callBack;
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DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
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/*
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* check the values.
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*/
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if (rows <= 0)
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rows = 1;
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if (columns <= 0)
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columns = 1;
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/* Set the size of the text view area to the requested number of columns */
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/* and lines. */
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char_width = pDAS->charWidth * columns;
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newWidth = char_width / 10 + (char_width % 10 ? 1 : 0) +
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2 * (pDAS->decorThickness + pDAS->marginWidth);
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newHeight = pDAS->lineHeight * rows + 2 * pDAS->decorThickness;
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/*
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* get the width and height of the scroll bars.
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*/
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if (pDAS->vertScrollWid)
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{
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XtSetArg (args[0], XmNwidth , &vertWidth);
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XtGetValues (pDAS->vertScrollWid, args, 1);
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}
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if (pDAS->horzScrollWid)
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{
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XtSetArg (args[0], XmNheight , &horzHeight);
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XtGetValues (pDAS->horzScrollWid, args, 1);
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}
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/*
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* loop a couple of times at most to get the sizing correct.
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* This is caused by the fact we can't do a set values on
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* the drawn button itself, someone above it is rejecting
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* the resize request. So, resize the great-grandparent
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* (a couple of times if necessary).
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*/
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do {
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/*
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* take into consideration the scrollbars.
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*/
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tstWidth = newWidth;
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tstHeight = newHeight;
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if (pDAS->vertScrollWid &&
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_DtHelpIS_AS_NEEDED(pDAS->neededFlags, _DtHelpVERTICAL_SCROLLBAR)
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&& pDAS->vertIsMapped)
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{
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if (tstWidth > vertWidth)
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tstWidth -= vertWidth;
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else
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tstWidth = 0;
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}
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if (pDAS->horzScrollWid &&
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_DtHelpIS_AS_NEEDED(pDAS->neededFlags, _DtHelpHORIZONTAL_SCROLLBAR)
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&& pDAS->horzIsMapped)
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{
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if (tstHeight > horzHeight)
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tstHeight -= horzHeight;
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else
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tstHeight = 0;
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}
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if (tstWidth == pDAS->dispWidth && tstHeight == pDAS->dispHeight)
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return;
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/*
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* kludge around the fact that some parent is not letting
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* me resize the drawn button. Get the parent's size and
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* resize that!
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*/
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n = 0;
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XtSetArg(args[n], XmNwidth, &oldWidth); ++n;
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XtSetArg(args[n], XmNheight, &oldHeight); ++n;
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XtGetValues(parent, args, n);
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/*
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* calculate its new size
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*/
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oldWidth = oldWidth - pDAS->dispWidth + tstWidth;
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oldHeight = oldHeight - pDAS->dispHeight + tstHeight;
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/*
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* set my parent's size to affect me.
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*/
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n = 0;
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XtSetArg(args[n], XmNwidth, oldWidth); ++n;
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XtSetArg(args[n], XmNheight, oldHeight); ++n;
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XtSetValues(parent, args, n);
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} while (count++ < 2);
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/*
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* check to see if the Set Values on my parent took care of everything.
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*/
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if (pDAS->vertScrollWid &&
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_DtHelpIS_AS_NEEDED(pDAS->neededFlags, _DtHelpVERTICAL_SCROLLBAR)
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&& pDAS->vertIsMapped)
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{
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if (newWidth > vertWidth)
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newWidth -= vertWidth;
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else
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newWidth = 0;
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}
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if (pDAS->horzScrollWid &&
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_DtHelpIS_AS_NEEDED(pDAS->neededFlags, _DtHelpHORIZONTAL_SCROLLBAR)
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&& pDAS->horzIsMapped)
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{
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if (newHeight > horzHeight)
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newHeight -= horzHeight;
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else
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newHeight = 0;
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}
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if (newWidth == pDAS->dispWidth && newHeight == pDAS->dispHeight)
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return;
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/*
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* clean up
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_DtHelpClearSelection (pDAS);
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*/
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/*
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* reset the scroll bars and possibly reformat the text.
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*/
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_DtHelpSetScrollBars (client_data, newWidth, newHeight);
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if (XtIsRealized (pDAS->dispWid))
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_DtHelpCleanAndDrawWholeCanvas(client_data);
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} /* End _DtHelpResizeDisplayArea */
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