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cdesktopenv/cde/lib/DtHelp/SetList.c

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/*
* CDE - Common Desktop Environment
*
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
*
* These libraries and programs are free software; you can
* redistribute them and/or modify them under the terms of the GNU
* Lesser General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* These libraries and programs are distributed in the hope that
* they will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with these librararies and programs; if not, write
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
* Floor, Boston, MA 02110-1301 USA
*/
/* $XConsortium: SetList.c /main/16 1996/11/18 16:35:22 cde-hp $ */
/************************************<+>*************************************
****************************************************************************
**
** File: SetList.c
**
** Project: Text Graphic Display Library
**
** Description: This body of code creates the Line and Graphic Tables for
** a Display Area.
**
**
****************************************************************************
************************************<+>*************************************/
/*
* (c) Copyright 1996 Digital Equipment Corporation.
* (c) Copyright 1987, 1988, 1989, 1990, 1991, 1992,
1993, 1994, 1996 Hewlett-Packard Company.
* (c) Copyright 1993, 1994, 1996 International Business Machines Corp.
* (c) Copyright 1993, 1994, 1996 Sun Microsystems, Inc.
* (c) Copyright 1993, 1994, 1996 Novell, Inc.
* (c) Copyright 1996 FUJITSU LIMITED.
* (c) Copyright 1996 Hitachi.
*/
/*
* system includes
*/
#include <string.h>
#include <stdlib.h>
#include <X11/Xlib.h>
/*
* Canvas Engine
*/
#include "CanvasP.h"
#include "CanvasSegP.h"
/*
* private includes
*/
#include "Access.h"
#include "CleanUpI.h"
#include "DisplayAreaP.h"
#include "CallbacksI.h"
#include "FontAttrI.h"
#include "FormatI.h"
#include "SetListI.h"
#include "XInterfaceI.h"
#include "XUICreateI.h"
#ifdef NLS16
#include <nl_types.h>
#endif
/******** Private Function Declarations ********/
/******** End Public Function Declarations ********/
/******************************************************************************
*
* Private defines and variables
*
*****************************************************************************/
#define GROW_SIZE 10
#define ALL_LINES -1
/******************************************************************************
*
* Private Macros
*
*****************************************************************************/
#define NeedVertScrollbar(x) \
_DtHelpIS_AS_NEEDED((x)->neededFlags,_DtHelpVERTICAL_SCROLLBAR)
#define NeedHorzScrollbar(x) \
_DtHelpIS_AS_NEEDED((x)->neededFlags,_DtHelpHORIZONTAL_SCROLLBAR)
/******************************************************************************
*
* Private Functions
*
*****************************************************************************/
static void
SetMaxPositions (
DtHelpDispAreaStruct *pDAS,
_DtCvUnit max_x,
_DtCvUnit max_y)
{
pDAS->maxX = max_x;
pDAS->maxYpos = max_y + pDAS->marginHeight;
}
/******************************************************************************
*
* Semi Public Functions - these routines called by other modules within
* the library.
*
*****************************************************************************/
/******************************************************************************
* Function: _DtHelpSetScrollBars
*
* Sets/Resets the vertical scroll bar values.
*****************************************************************************/
enum DoSomething { DoNothing, DoManage, DoUnmanage };
Boolean
_DtHelpSetScrollBars (
XtPointer client_data,
Dimension new_width,
Dimension new_height)
{
int n = 0;
int dispN = 0;
int changeWidth = 0;
int changeHeight = 0;
int oldMaxYpos;
int slideSize;
int maximum;
int pageInc;
int oldScrollPercent = 10000;
_DtCvUnit ret_width;
_DtCvUnit ret_height;
Arg dispArgs[10];
Arg args[10];
Dimension marginWidth;
Dimension marginHeight;
Dimension horzHeight;
Dimension vertWidth;
Dimension oldHeight;
Dimension oldWidth;
XRectangle rectangle[1];
enum DoSomething doVert = DoNothing;
enum DoSomething doHorz = DoNothing;
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
/*
* remember the old first line.
*/
oldMaxYpos = pDAS->maxYpos;
if (pDAS->firstVisible && pDAS->maxYpos)
oldScrollPercent = pDAS->firstVisible * 10000 / pDAS->maxYpos;
/*
* get the width and height of the scroll bars.
*/
if (pDAS->vertScrollWid)
{
XtSetArg (args[0], XmNwidth , &vertWidth);
XtGetValues (pDAS->vertScrollWid, args, 1);
}
if (pDAS->horzScrollWid)
{
XtSetArg (args[0], XmNheight , &horzHeight);
XtGetValues (pDAS->horzScrollWid, args, 1);
}
/*
* remember our old width and height
*/
oldWidth = pDAS->dispWidth;
oldHeight = pDAS->dispHeight;
/*
* Settle the sizing issue before we remap the scroll bars.
*/
do
{
/*
* set the height.
*/
if (new_height != pDAS->dispHeight)
{
pDAS->dispHeight = new_height;
pDAS->dispUseHeight = new_height - 2 * pDAS->decorThickness;
if (((int) new_height) < 2 * ((int) pDAS->decorThickness))
pDAS->dispUseHeight = 0;
pDAS->visibleCount = ((int) pDAS->dispUseHeight) /
pDAS->lineHeight;
if (pDAS->visibleCount < 0)
pDAS->visibleCount = 0;
}
/*
* check to see if we've changed width
*/
if (new_width != pDAS->dispWidth)
{
/*
* set the new width
*/
pDAS->dispWidth = new_width;
pDAS->dispUseWidth = new_width - 2 * pDAS->decorThickness;
if (((int)new_width) < 2 * ((int) pDAS->decorThickness))
pDAS->dispUseWidth = 0;
/*
* re-layout the information.
*/
if (_DtCvSTATUS_OK ==
_DtCanvasResize(pDAS->canvas, _DtCvFALSE,
&ret_width, &ret_height))
SetMaxPositions (pDAS, ret_width, ret_height);
}
/*
* Check to see if we have a vertical scrollbar and whether it
* is as_needed. If static, it is always mapped.
*/
if (NULL != pDAS->vertScrollWid && NeedVertScrollbar(pDAS))
{
/*
* will the information fit on one page?
*/
if (pDAS->maxYpos <= ((int) pDAS->dispUseHeight))
{
/*
* If the window has not already been 'stretched' by
* the width of the scrollbar and if the scrollbar is
* mapped, grow the window width.
*/
if (0 == changeWidth && pDAS->vertIsMapped)
{
/*
* set the flag to indicate that the window width
* has grown. This can occur only if the window
* has its vertical scrollbar already mapped.
*/
changeWidth = 1;
new_width += vertWidth;
}
/*
* Else check to see if the window has been shrunk.
* If so, then stretch it back out to its original
* width.
*
* This can occur only if
* a) The vertical scrollbar is not mapped.
* b) The previous pass through this code indicates
* that the window could not hold the length of
* the information, and therefore calculations and
* flags were set to map the vertical scrollbar.
* But a _DtCanvasResize() now indicates that a
* vertical scrollbar is not needed. So we don't
* need the vertical scrollbar and have to nuliify
* the calculation to include it.
*/
else if (-1 == changeWidth)
{
changeWidth = 0;
new_width += vertWidth;
}
}
/*
* The information will not fit on one page.
*/
else
{
/*
* If the window has not already been shrunk to
* accomidate the vertical scrollbar (and the scrollbar
* is not already mapped) then set the flags and
* shrink the width.
*/
if (False == pDAS->vertIsMapped && 0 == changeWidth)
{
/*
* set the flag to indicate that the window width
* has shrunk (and that consequently, the vertical
* scrollbar is not mapped).
*/
changeWidth = -1;
if (new_width > vertWidth)
new_width -= vertWidth;
else
new_width = 0;
}
/*
* Else check to see if the window has been streched.
* If so, then shrink it back out to its original
* width.
*
* This can occur only if
* a) The vertical scrollbar is mapped.
* b) The previous pass through this code indicates
* that the window could hold the length of
* the information, and therefore calculations and
* flags were set to unmap the vertical scrollbar.
* But a _DtCanvasResize() now indicates that a
* vertical scrollbar is needed. So we need
* the vertical scrollbar and have to nuliify
* the calculation to eliminate it.
*/
else if (1 == changeWidth)
{
changeWidth = 0;
new_width -= vertWidth;
}
}
}
/*
* Check to see if we have a horizontal scrollbar and whether it
* is as_needed. If static, it is always mapped.
*/
if (NULL != pDAS->horzScrollWid && NeedHorzScrollbar(pDAS))
{
/*
* will the information fit within the right border?
*/
if (pDAS->maxX <= ((int) pDAS->dispUseWidth))
{
/*
* If the window has not already been 'stretched' by
* the height of the scrollbar and if the scrollbar is
* mapped, grow the window.
*/
if (0 == changeHeight && pDAS->horzIsMapped)
{
/*
* set the flag to indicate that the window has
* grown. This can occur only if the window has
* its horizontal scrollbar already mapped.
*/
changeHeight = 1;
new_height += horzHeight;
}
/*
* Else check to see if the window has been shrunk.
* If so, stretch it back to its original height.
*
* This can occur only if
* a) The horizontal scrollbar is not mapped.
* b) The previous pass through the code indicated
* that the information exceeded the right border
* and therefore calculations and flags were set
* to map the horizontal scrollbar. But a
* _DtCanvasResize() now indicates that the
* horizontal scrollbar is not needed. So we
* have to nullify the calculations and flags
* set to include it.
*/
else if (-1 == changeHeight)
{
changeHeight = 0;
new_height += horzHeight;
}
}
/*
* The information exceeds the right border of the window.
*/
else
{
/*
* If the window has no already been shrunk to
* accomidate the horizontal scrollbar (and the
* scrollbar is not already mapped), then set the
* flags and shrink the height.
*/
if (False == pDAS->horzIsMapped && 0 == changeHeight)
{
/*
* set the flag to indicate that the window height
* has shrunk (and that the scrollbar needs mapping).
*/
changeHeight = -1;
if (new_height > horzHeight)
new_height -= horzHeight;
else
new_height = 0;
}
/*
* Else check to see if the window has been streched.
* If so, then shrink it back out to its original
* height.
*
* This can occur only if
* a) The horizontal scrollbar is mapped.
* b) The previous pass through the code indicated
* that the information did not exceeded the right
* border and therefore calculations and flags were
* set to unmap the horizontal scrollbar. But a
* _DtCanvasResize() now indicates that the
* horizontal scrollbar is needed. So we
* have to nullify the calculations and flags
* set to exclude it.
*/
else if (1 == changeHeight)
{
changeHeight = 0;
new_height -= horzHeight;
}
}
}
} while (new_height != pDAS->dispHeight || new_width != pDAS->dispWidth);
/*
* reset the first visible line, if needed.
*/
if (oldScrollPercent != 10000 && pDAS->maxYpos != oldMaxYpos)
pDAS->firstVisible = pDAS->maxYpos * oldScrollPercent / 10000;
if (pDAS->firstVisible + ((int)pDAS->dispUseHeight) > pDAS->maxYpos)
pDAS->firstVisible = pDAS->maxYpos - pDAS->dispUseHeight;
if (pDAS->firstVisible < 0)
pDAS->firstVisible = 0;
/*
* Reset the virtual X value, if needed
*/
if (pDAS->virtualX &&
(pDAS->maxX - pDAS->virtualX < ((int) pDAS->dispUseWidth)))
{
pDAS->virtualX = pDAS->maxX - pDAS->dispUseWidth;
if (pDAS->virtualX < 0)
pDAS->virtualX = 0;
}
/*
* If I've changed my size, I've got to change my clip masks.
*/
if (oldWidth != pDAS->dispWidth || oldHeight != pDAS->dispHeight)
{
/*
* If the display area hasn't been realized, the resetting of
* the bottom right corner offsets will not cause a resize
* event to occur. Rather the overall window will grow by
* the width or height of the scroll bar and not cause the
* display area to shrink. Therefore when the exposure event
* is called the width or height will be not be equal to what
* I think it should be causing the code to believe a resize
* is in process. The short of the matter is that the exposure
* will not happen and we end up with a blank window.
*
* So for this case, resize the display area to what we think it
* should be and the exposure event will then happen.
if (!XtIsRealized (pDAS->dispWid))
*/
{
XtSetArg(dispArgs[dispN], XmNwidth, pDAS->dispWidth); ++dispN;
XtSetArg(dispArgs[dispN], XmNheight, pDAS->dispHeight); ++dispN;
}
rectangle[0].x = pDAS->decorThickness;
rectangle[0].y = pDAS->decorThickness;
rectangle[0].width = pDAS->dispUseWidth;
rectangle[0].height = pDAS->dispUseHeight;
XSetClipRectangles(XtDisplay(pDAS->dispWid), pDAS->normalGC, 0, 0,
rectangle, 1, Unsorted);
XSetClipRectangles(XtDisplay(pDAS->dispWid), pDAS->invertGC, 0, 0,
rectangle, 1, Unsorted);
if (pDAS->resizeCall)
(*(pDAS->resizeCall)) (pDAS->clientData);
}
/*
* Has the width changed? If so, then we are mapping or unmapping
* the vertical scrollbar.
*/
if (-1 == changeWidth)
{
/*
* manage the scrollbar, the window has shrunk.
*/
doVert = DoManage;
XtSetArg(dispArgs[dispN], XmNrightAttachment, XmATTACH_WIDGET);
++dispN;
XtSetArg(dispArgs[dispN], XmNrightWidget, pDAS->vertScrollWid);
++dispN;
}
else if (1 == changeWidth)
{
/*
* unmanage the scrollbar, the window has grown.
*/
doVert = DoUnmanage;
XtSetArg(dispArgs[dispN], XmNrightAttachment, XmATTACH_FORM);
++dispN;
}
/*
* Has the height changed? If so, then we are mapping or unmapping
* the horizontal scrollbar.
*/
if (-1 == changeHeight)
{
/*
* manage the scrollbar, the window has shrunk.
*/
doHorz = DoManage;
XtSetArg(dispArgs[dispN], XmNbottomAttachment,XmATTACH_WIDGET);
++dispN;
XtSetArg(dispArgs[dispN], XmNbottomWidget,pDAS->horzScrollWid);
++dispN;
}
else if (1 == changeHeight)
{
/*
* unmanage the scrollbar, the window has grown.
*/
doHorz = DoUnmanage;
XtSetArg(dispArgs[dispN], XmNbottomAttachment, XmATTACH_FORM);
++dispN;
}
/*
* get the margins, widths and height.
*/
XtSetArg (args[0], XmNmarginWidth , &marginWidth);
XtSetArg (args[1], XmNmarginHeight, &marginHeight);
XtGetValues (XtParent (pDAS->dispWid), args, 2);
/*
* have to map the scroll bars before the drawn button can be
* attached to them and can't unmap the scroll bars until
* the drawn button has been unattached from them. But we
* want to do the re-attachments all at once to minimize the
* resizing.
*/
if (doHorz == DoManage)
{
if (!XtIsRealized(pDAS->horzScrollWid))
XtSetMappedWhenManaged (pDAS->horzScrollWid, True);
else
XtMapWidget (pDAS->horzScrollWid);
pDAS->horzIsMapped = True;
}
if (doVert == DoManage)
{
if (!XtIsRealized(pDAS->vertScrollWid))
XtSetMappedWhenManaged (pDAS->vertScrollWid, True);
else
XtMapWidget (pDAS->vertScrollWid);
pDAS->vertIsMapped = True;
}
if (pDAS->vertScrollWid && pDAS->vertIsMapped && doVert != DoUnmanage)
{
if (pDAS->horzScrollWid && pDAS->horzIsMapped && doHorz != DoUnmanage)
XtSetArg(args[0], XmNbottomOffset, (marginHeight + horzHeight));
else
XtSetArg(args[0], XmNbottomOffset, marginHeight);
n = 1;
/*
* set the slider size.
*/
slideSize = pDAS->dispUseHeight;
if (slideSize < 1)
slideSize = 1;
/*
* determine the maximum size
*/
maximum = pDAS->maxYpos;
if (maximum < slideSize)
maximum = slideSize;
if (maximum < 1)
maximum = 1;
/*
* determine the page increment.
*/
pageInc = 1;
if (((int)pDAS->dispUseHeight) - pDAS->lineHeight > 2)
pageInc = pDAS->dispUseHeight - pDAS->lineHeight;
XtSetArg (args[n], XmNvalue , pDAS->firstVisible); ++n;
XtSetArg (args[n], XmNsliderSize , slideSize); ++n;
XtSetArg (args[n], XmNmaximum , maximum); ++n;
XtSetArg (args[n], XmNpageIncrement, pageInc); ++n;
XtSetValues (pDAS->vertScrollWid, args, n);
}
if (pDAS->horzScrollWid && pDAS->horzIsMapped && doHorz != DoUnmanage)
{
if (pDAS->vertScrollWid && pDAS->vertIsMapped && doVert != DoUnmanage)
XtSetArg(args[0], XmNrightOffset, (marginWidth + vertWidth));
else
XtSetArg(args[0], XmNrightOffset, marginWidth);
n = 1;
/*
* determine the slider size.
*/
slideSize = pDAS->dispUseWidth - 1;
if (slideSize < 1)
slideSize = 1;
/*
* determine the maximum size
*/
maximum = slideSize;
if (maximum < pDAS->maxX)
maximum = pDAS->maxX - 1;
if (maximum < 1)
maximum = 1;
/*
* determine the page increment.
*/
pageInc = 1;
if (((int) pDAS->dispUseWidth) > 2)
pageInc = pDAS->dispUseWidth - 1;
XtSetArg (args[n], XmNvalue , pDAS->virtualX); n++;
XtSetArg (args[n], XmNsliderSize , slideSize); n++;
XtSetArg (args[n], XmNmaximum , maximum); n++;
XtSetArg (args[n], XmNpageIncrement, pageInc); ++n;
XtSetValues (pDAS->horzScrollWid, args, n);
}
/*
* set the display area args
*/
if (dispN)
XtSetValues (pDAS->dispWid, dispArgs, dispN);
/*
* unmap those we don't want.
*/
if (doHorz == DoUnmanage)
{
if (!XtIsRealized(pDAS->horzScrollWid))
XtSetMappedWhenManaged (pDAS->horzScrollWid, False);
else
XtUnmapWidget (pDAS->horzScrollWid);
pDAS->horzIsMapped = False;
}
if (doVert == DoUnmanage)
{
if (!XtIsRealized(pDAS->vertScrollWid))
XtSetMappedWhenManaged (pDAS->vertScrollWid, False);
else
XtUnmapWidget (pDAS->vertScrollWid);
pDAS->vertIsMapped = False;
}
/*
* return whether or not we generated a resize (and hence an expose
* event) by resizing the display area.
*/
return (dispN ? True : False);
} /* End _DtHelpSetScrollBars */
/******************************************************************************
*
* Public Functions - those an application developer can call.
*
*****************************************************************************/
/*********************************************************************
* Function: SetList
*
* SetList creates a Text Graphic area with the appropriate scroll bars.
*
*********************************************************************/
void
_DtHelpDisplayAreaSetList (
XtPointer client_data,
XtPointer topic_handle,
Boolean append_flag,
int scroll_percent)
{
_DtCvUnit width;
_DtCvUnit height;
_DtCvUnit scrollY;
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
/*
* clear the selection
*/
_DtHelpClearSelection (client_data);
/*
* If there is anything to do
*/
_DtCanvasSetTopic (pDAS->canvas, (_DtCvTopicPtr) topic_handle,
pDAS->honor_size,
&width, &height, &scrollY);
/*
* free the old topic and remember the new
*/
_DtHelpDestroyTopicData(pDAS->lst_topic, _DtHelpDADestroyRegion,
(_DtCvPointer) pDAS);
pDAS->lst_topic = (_DtCvTopicPtr) topic_handle;
/*
* do we want to scroll?
*/
if (scroll_percent != -1)
scrollY = scroll_percent * height / 1000;
/*
* Reset the scroll bars and perhaps do an expose.
*/
SetMaxPositions (pDAS, width, height);
pDAS->firstVisible = scrollY;
if (pDAS->firstVisible + ((int)pDAS->dispUseHeight) > pDAS->maxYpos)
pDAS->firstVisible = pDAS->maxYpos - pDAS->dispUseHeight;
if (pDAS->firstVisible < 0)
pDAS->firstVisible = 0;
(void) _DtHelpSetScrollBars (client_data, pDAS->dispWidth, pDAS->dispHeight);
if (XtIsRealized (pDAS->dispWid))
_DtHelpCleanAndDrawWholeCanvas(client_data);
} /* End _DtHelpDisplayAreaSetList */
/*****************************************************************************
* Function: void _DtHelpDisplayAreaDimensionsReturn (DtHelpDispAreaStruct *pDAS,
* int *ret_width, int *ret_height)
*
* Parameters pDAS Specifies the Display Area.
* ret_rows Returns the number of rows in
* the Display Area.
* ret_columns Returns the number of columns in
* the Display Area.
*
* Returns: nothing
*
* Purpose: Allows access to the height and width of a Display Area.
*
*****************************************************************************/
void
_DtHelpDisplayAreaDimensionsReturn (
XtPointer client_data,
short *ret_rows,
short *ret_columns )
{
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
*ret_rows = ((int)pDAS->dispUseHeight) / pDAS->lineHeight;
*ret_columns = ((int) pDAS->dispUseWidth) / (pDAS->charWidth / 10);
} /* End _DtHelpDisplayAreaDimensionsReturn */
/*****************************************************************************
* Function: int _DtHelpGetScrollbarValue (DtHelpDispAreaStruct *pDAS)
*
* Parameters pDAS Specifies the Display Area.
*
* Returns: a value from -1 to 100.
* -1 means the vertical scrollbar was not created when
* the display area was created.
* 0 to 100 is the percentage the vertical scroll bar is
* scrolled displaying the current topic.
*
* Purpose: Allows the system to query the location of the scrollbar
* and remember for smart-backtracking.
*
*****************************************************************************/
int
_DtHelpGetScrollbarValue (XtPointer client_data)
{
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
int percent = -1;
if (pDAS->vertScrollWid != NULL)
{
percent = 0;
if (pDAS->firstVisible && pDAS->maxYpos)
percent = (pDAS->firstVisible * 1000) / pDAS->maxYpos;
}
return percent;
} /* End _DtHelpGetScrollbarValue */
/*****************************************************************************
* Function: int _DtHelpUpdatePath (DtHelpDispAreaStruct *pDAS,
*
* Parameters pDAS Specifies the Display Area.
*
* Returns: a value from -1 to 100.
* -1 means the vertical scrollbar was not created when
* the display area was created.
* 0 to 100 is the percentage the vertical scroll bar is
* scrolled displaying the current topic.
*
* Purpose: Allows the system to query the location of the scrollbar
* and remember for smart-backtracking.
*
*****************************************************************************/
int
_DtHelpUpdatePath (
DtHelpDispAreaStruct *pDAS,
_DtHelpVolumeHdl volume_handle,
char *loc_id)
{
int result;
char *realId;
_DtCvUnit width;
_DtCvUnit height;
_DtCvUnit tocY;
_DtCvUnit tocHeight;
XtPointer topic_handle;
/*
* turn off the toc marker
*/
_DtHelpDATocMarker(pDAS, False);
(void) _DtCanvasMoveTraversal(pDAS->canvas, _DtCvTRAVERSAL_OFF, False,
((_DtCvValue) XtIsRealized(pDAS->dispWid)),
NULL, NULL, NULL, NULL, NULL);
/*
* now create and set the topic
*/
result = _DtHelpFormatToc(pDAS,volume_handle,loc_id,&realId,&topic_handle);
if (-1 == result)
return -1;
_DtCanvasSetTopic (pDAS->canvas, (_DtCvTopicPtr) topic_handle,
pDAS->honor_size,
&width, &height, NULL);
/*
* free the old topic and remember the new
*/
_DtHelpDestroyTopicData(pDAS->lst_topic, _DtHelpDADestroyRegion,
(_DtCvPointer) pDAS);
pDAS->lst_topic = (_DtCvTopicPtr) topic_handle;
/*
* Reset the scroll bars and perhaps do an expose.
*/
SetMaxPositions (pDAS, width, height);
/*
* now turn the traversal on - but only if there is a path in
* the TOC.
*/
if (1 != result)
{
(void) _DtCanvasMoveTraversal(pDAS->canvas, _DtCvTRAVERSAL_ID, False,
((_DtCvStatus) XtIsRealized(pDAS->dispWid)), realId,
NULL, &(pDAS->toc_y), &(pDAS->toc_base), &(pDAS->toc_height));
/*
* figure out where the first line should be...
*/
tocY = pDAS->toc_y - pDAS->lineThickness;
tocHeight = pDAS->toc_height + (2 * pDAS->lineThickness);
if (tocY < pDAS->firstVisible ||
tocY + tocHeight > pDAS->firstVisible + ((int)pDAS->dispUseHeight))
{
pDAS->firstVisible = tocY;
if (pDAS->firstVisible + ((int)pDAS->dispUseHeight) > pDAS->maxYpos)
pDAS->firstVisible = pDAS->maxYpos - pDAS->dispUseHeight;
if (pDAS->firstVisible < 0)
pDAS->firstVisible = 0;
}
}
/*
* Reset the scroll bars and perhaps do an expose.
*/
(void) _DtHelpSetScrollBars((XtPointer) pDAS, pDAS->dispWidth, pDAS->dispHeight);
if (XtIsRealized (pDAS->dispWid))
_DtHelpCleanAndDrawWholeCanvas((XtPointer) pDAS);
if (1 != result)
_DtHelpDATocMarker((XtPointer) pDAS, True);
return 0;
} /* End _DtHelpUpdatePath */
/*****************************************************************************
* Function: Widget _DtHelpDisplayAreaWidget ();
*
* Parameters:
* client_data Specifies the display area pointer.
*
* Returns: the widget associated with the display area.
*
* Purpose:
*
*****************************************************************************/
Widget
_DtHelpDisplayAreaWidget (
XtPointer client_data)
{
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
return (pDAS->dispWid);
}
/*****************************************************************************
* Function: XtPointer _DtHelpDisplayAreaData ();
*
* Parameters:
* client_data Specifies the display area pointer.
*
* Returns: the client data associated with the display area.
*
* Purpose:
*
*****************************************************************************/
XtPointer
_DtHelpDisplayAreaData (
XtPointer client_data)
{
DtHelpDispAreaStruct *pDAS = (DtHelpDispAreaStruct *) client_data;
return (pDAS->clientData);
}
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