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MultiList.c
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MultiList.c
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/****************************************************************************
MultiList.c
This file contains the implementation of the Picasso List
widget. Its functionality is intended to be similar to
The Athena List widget, with some extra features added.
This code is loosely based on the Athena List source which
is why the MIT copyright notice appears below.
The code was changed substantially in V3.4 to change the
action/callback interface which was unnecessarily ugly. Code
using some features of the old interface may need to be changed.
Hope the changes don't make people's lives too miserable.
****************************************************************************/
/*
* Author:
* Brian Totty
* Department of Computer Science
* University Of Illinois at Urbana-Champaign
* 1304 West Springfield Avenue
* Urbana, IL 61801
*
*
*/
/*
* Copyright 1989 Massachusetts Institute of Technology
*
* 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 appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. M.I.T. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Original Athena Author: Chris D. Peterson, MIT X Consortium
*/
#include <stdio.h>
#ifndef NOSTDHDRS
#include <stdlib.h>
#endif
#include <ctype.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include "MultiListP.h"
/*===========================================================================*
D E C L A R A T I O N S A N D D E F I N I T I O N S
*===========================================================================*/
Pixmap XmuCreateStippledPixmap();
extern void XawInitializeWidgetSet();
#define SUPERCLASS &(simpleClassRec)
#define FontAscent(f) ((f)->max_bounds.ascent)
#define FontDescent(f) ((f)->max_bounds.descent)
#define FontH(f) (FontAscent(f) + FontDescent(f) + 2)
#define FontW(f, s) (XTextWidth(f, s, strlen(s)) + 1)
#define FontMaxCharW(f) \
((f)->max_bounds.rbearing - (f)->min_bounds.lbearing + 1)
#ifndef abs
#define abs(a) ((a) < 0 ? -(a) : (a))
#endif
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))
#define XtStrlen(s) ((s) ? strlen(s) : 0)
#define TypeAlloc(t, n) (t *)malloc(sizeof(t) * n)
#define StrCopy(s) strcpy(TypeAlloc(char, strlen(s) + 1), s)
#define StrCopyRetLength(s, lp) \
strcpy(TypeAlloc(char, (*lp = (strlen(s) + 1))), s)
#define CoreFieldOffset(f) XtOffset(Widget, core.f)
#define SimpleFieldOffset(f) XtOffset(XfwfMultiListWidget, simple.f)
#define MultiListFieldOffset(f) XtOffset(XfwfMultiListWidget, multiList.f)
/*===========================================================================*
I N T E R N A L P R O C E D U R E D E C L A R A T I O N S
*===========================================================================*/
#if (!NeedFunctionPrototypes)
static void Initialize();
static void Redisplay();
static XtGeometryResult PreferredGeometry();
static void Resize();
static Boolean SetValues();
static void DestroyOldData();
static void InitializeNewData();
static void CreateNewGCs();
static void RecalcCoords();
static void NegotiateSizeChange();
static Boolean Layout();
static void RedrawAll();
static void RedrawItem();
static void RedrawRowColumn();
static void PixelToRowColumn();
static void RowColumnToPixels();
static Boolean RowColumnToItem();
static Boolean ItemToRowColumn();
static void Select();
static void Unselect();
static void Toggle();
static void Extend();
static void Notify();
#else
static void Initialize(Widget request, Widget new);
static void Redisplay(XfwfMultiListWidget mlw, XEvent *event,
Region rectangle_union);
static XtGeometryResult PreferredGeometry(XfwfMultiListWidget mlw,
XtWidgetGeometry *parent_idea,
XtWidgetGeometry *our_idea);
static void Resize(XfwfMultiListWidget mlw);
static Boolean SetValues(XfwfMultiListWidget cpl, XfwfMultiListWidget rpl,
XfwfMultiListWidget npl);
static void DestroyOldData(XfwfMultiListWidget mlw);
static void InitializeNewData(XfwfMultiListWidget mlw);
static void CreateNewGCs(XfwfMultiListWidget mlw);
static void RecalcCoords(XfwfMultiListWidget mlw, Boolean width_changeable,
Boolean height_changeable);
static void NegotiateSizeChange(XfwfMultiListWidget mlw, Dimension width,
Dimension height);
static Boolean Layout(XfwfMultiListWidget mlw, Boolean w_changeable,
Boolean h_changeable, Dimension *w_ptr, Dimension *h_ptr);
static void RedrawAll(XfwfMultiListWidget mlw);
static void RedrawItem(XfwfMultiListWidget mlw, int item_index);
static void RedrawRowColumn(XfwfMultiListWidget mlw, int row, int column);
static void PixelToRowColumn(XfwfMultiListWidget mlw, int x, int y,
int *row_ptr, int *column_ptr);
static void RowColumnToPixels(XfwfMultiListWidget mlw, int row, int col,
int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr);
static Boolean RowColumnToItem(XfwfMultiListWidget mlw, int row, int column,
int *item_ptr);
static Boolean ItemToRowColumn(XfwfMultiListWidget mlw, int item_index,
int *row_ptr, int *column_ptr);
static void Select(XfwfMultiListWidget mlw, XEvent *event, String *params,
Cardinal *num_params);
static void Unselect(XfwfMultiListWidget mlw, XEvent *event, String *params,
Cardinal *num_params);
static void Toggle(XfwfMultiListWidget mlw, XEvent *event, String *params,
Cardinal *num_params);
static void Extend(XfwfMultiListWidget mlw, XEvent *event, String *params,
Cardinal *num_params);
static void Notify(XfwfMultiListWidget mlw, XEvent *event, String *params,
Cardinal *num_params);
#endif
/*===========================================================================*
R E S O U R C E I N I T I A L I Z A T I O N
*===========================================================================*/
static XtResource resources[] = {
{XtNwidth, XtCWidth, XtRDimension, sizeof(Dimension),
CoreFieldOffset(width), XtRString, "0"},
{XtNheight, XtCHeight, XtRDimension, sizeof(Dimension),
CoreFieldOffset(height), XtRString, "0"},
{XtNbackground, XtCBackground, XtRPixel, sizeof(Pixel),
CoreFieldOffset(background_pixel), XtRString, "XtDefaultBackground"},
{XtNcursor, XtCCursor, XtRCursor, sizeof(Cursor), SimpleFieldOffset(cursor),
XtRString, "left_ptr"},
{XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel),
MultiListFieldOffset(foreground), XtRString, "XtDefaultForeground"},
{XtNhighlightForeground, XtCHForeground, XtRPixel, sizeof(Pixel),
MultiListFieldOffset(highlight_fg), XtRString, "XtDefaultBackground"},
{XtNhighlightBackground, XtCHBackground, XtRPixel, sizeof(Pixel),
MultiListFieldOffset(highlight_bg), XtRString, "XtDefaultForeground"},
{XtNcolumnSpacing, XtCSpacing, XtRDimension, sizeof(Dimension),
MultiListFieldOffset(column_space), XtRImmediate, (caddr_t)8},
{XtNrowSpacing, XtCSpacing, XtRDimension, sizeof(Dimension),
MultiListFieldOffset(row_space), XtRImmediate, (caddr_t)0},
{XtNdefaultColumns, XtCColumns, XtRInt, sizeof(int),
MultiListFieldOffset(default_cols), XtRImmediate, (caddr_t)1},
{XtNforceColumns, XtCColumns, XtRBoolean, sizeof(Boolean),
MultiListFieldOffset(force_cols), XtRString, (caddr_t) "False"},
{XtNpasteBuffer, XtCBoolean, XtRBoolean, sizeof(Boolean),
MultiListFieldOffset(paste), XtRString, (caddr_t) "False"},
{XtNverticalList, XtCBoolean, XtRBoolean, sizeof(Boolean),
MultiListFieldOffset(row_major), XtRString, (caddr_t) "False"},
{XtNlongest, XtCLongest, XtRInt, sizeof(int), MultiListFieldOffset(longest),
XtRImmediate, (caddr_t)0},
{XtNnumberStrings, XtCNumberStrings, XtRInt, sizeof(int),
MultiListFieldOffset(nitems), XtRImmediate, (caddr_t)0},
{XtNfont, XtCFont, XtRFontStruct, sizeof(XFontStruct *),
MultiListFieldOffset(font), XtRString, "XtDefaultFont"},
{XtNlist, XtCList, XtRPointer, sizeof(char **), MultiListFieldOffset(list),
XtRString, NULL},
{XtNsensitiveArray, XtCList, XtRPointer, sizeof(Boolean *),
MultiListFieldOffset(sensitive_array), XtRString, NULL},
{XtNcallback, XtCCallback, XtRCallback, sizeof(caddr_t),
MultiListFieldOffset(callback), XtRCallback, NULL},
{XtNmaxSelectable, XtCValue, XtRInt, sizeof(int),
MultiListFieldOffset(max_selectable), XtRImmediate, (caddr_t)1},
{XtNshadeSurplus, XtCBoolean, XtRBoolean, sizeof(Boolean),
MultiListFieldOffset(shade_surplus), XtRString, "True"},
{XtNcolumnWidth, XtCValue, XtRDimension, sizeof(Dimension),
MultiListFieldOffset(col_width), XtRImmediate, (caddr_t)0},
{XtNrowHeight, XtCValue, XtRDimension, sizeof(Dimension),
MultiListFieldOffset(row_height), XtRImmediate, (caddr_t)0},
};
/*===========================================================================*
A C T I O N A N D T R A N S L A T I O N T A B L E S
*===========================================================================*/
static char defaultTranslations[] =
" Shift <Btn1Down>: Toggle()\n\
Ctrl <Btn1Down>: Unselect()\n\
<Btn1Down>: Select()\n\
Button1 <Btn1Motion>: Extend()\n\
<Btn1Up>: Notify()";
static XtActionsRec actions[] = {
{"Select", (XtActionProc)Select}, {"Unselect", (XtActionProc)Unselect},
{"Toggle", (XtActionProc)Toggle}, {"Extend", (XtActionProc)Extend},
{"Notify", (XtActionProc)Notify}, {NULL, (XtActionProc)NULL}};
/*===========================================================================*
C L A S S A L L O C A T I O N
*===========================================================================*/
XfwfMultiListClassRec xfwfMultiListClassRec = {
{/* superclass */ (WidgetClass)SUPERCLASS,
/* class_name */ "XfwfMultiList",
/* widget_size */ sizeof(XfwfMultiListRec),
/* class_initialize */ NULL,
/* class_part_initialize*/ NULL,
/* class_inited */ FALSE,
/* initialize */ (XtInitProc)Initialize,
/* initialize_hook */ NULL,
/* realize */ XtInheritRealize,
/* actions */ actions,
/* num_actions */ XtNumber(actions),
/* resources */ resources,
/* resource_count */ XtNumber(resources),
/* xrm_class */ NULLQUARK,
/* compress_motion */ TRUE,
/* compress_exposure */ FALSE,
/* compress_enterleave */ TRUE,
/* visible_interest */ FALSE,
/* destroy */ NULL,
/* resize */ (XtWidgetProc)Resize,
/* expose */ (XtExposeProc)Redisplay,
/* set_values */ (XtSetValuesFunc)SetValues,
/* set_values_hook */ NULL,
/* set_values_almost */ XtInheritSetValuesAlmost,
/* get_values_hook */ NULL,
/* accept_focus */ NULL,
/* version */ XtVersion,
/* callback_private */ NULL,
/* tm_table */ defaultTranslations,
/* query_geometry */ (XtGeometryHandler)PreferredGeometry,
/* display_accelerator */ XtInheritDisplayAccelerator,
/* extension */ NULL}, /* Core Part */
{/* change_sensitive */ XtInheritChangeSensitive}};
WidgetClass xfwfMultiListWidgetClass = (WidgetClass)&xfwfMultiListClassRec;
/*===========================================================================*
T O O L K I T M E T H O D S
*===========================================================================*/
/*---------------------------------------------------------------------------*
Initialize()
This procedure is called by the X toolkit to initialize
the widget instance. The hook to this routine is in the
initialize part of the core part of the class.
*---------------------------------------------------------------------------*/
/* ARGSUSED */
static void Initialize(request, new) Widget request, new;
{
XfwfMultiListWidget mlw;
mlw = (XfwfMultiListWidget) new;
CreateNewGCs(mlw);
InitializeNewData(mlw);
RecalcCoords(mlw, (MultiListWidth(mlw) == 0), (MultiListHeight(mlw) == 0));
} /* Initialize */
/*---------------------------------------------------------------------------*
Redisplay(mlw,event,rectangle_union)
This routine redraws the MultiList widget <mlw> based on the exposure
region requested in <event>.
*---------------------------------------------------------------------------*/
/* ARGSUSED */
static void Redisplay(mlw, event, rectangle_union) XfwfMultiListWidget mlw;
XEvent *event;
Region rectangle_union;
{
GC shade_gc;
int i, x1, y1, w, h, x2, y2, row, col, ul_row, ul_col, lr_row, lr_col;
if (MultiListShadeSurplus(mlw))
shade_gc = MultiListGrayGC(mlw);
else
shade_gc = MultiListEraseGC(mlw);
if (event == NULL) {
XFillRectangle(XtDisplay(mlw), XtWindow(mlw), shade_gc, 0, 0,
MultiListWidth(mlw), MultiListHeight(mlw));
for (i = 0; i < MultiListNumItems(mlw); i++)
RedrawItem(mlw, i);
} else {
x1 = event->xexpose.x;
y1 = event->xexpose.y;
w = event->xexpose.width;
h = event->xexpose.height;
x2 = x1 + w;
y2 = y1 + h;
XFillRectangle(XtDisplay(mlw), XtWindow(mlw), shade_gc, x1, y1, w, h);
PixelToRowColumn(mlw, x1, y1, &ul_row, &ul_col);
PixelToRowColumn(mlw, x2, y2, &lr_row, &lr_col);
lr_row = min(lr_row, MultiListNumRows(mlw) - 1);
lr_col = min(lr_col, MultiListNumCols(mlw) - 1);
for (col = ul_col; col <= lr_col; col++)
for (row = ul_row; row <= lr_row; row++)
RedrawRowColumn(mlw, row, col);
}
} /* End Redisplay */
/*---------------------------------------------------------------------------*
PreferredGeometry(mlw,parent_idea,our_idea)
This routine is called by the parent to tell us about the
parent's idea of our width and/or height. We then suggest
our preference through <our_idea> and return the information
to the parent.
*---------------------------------------------------------------------------*/
static XtGeometryResult PreferredGeometry(mlw, parent_idea,
our_idea) XfwfMultiListWidget mlw;
XtWidgetGeometry *parent_idea, *our_idea;
{
Dimension nw, nh;
Boolean parent_wants_w, parent_wants_h, we_changed_size;
parent_wants_w = (parent_idea->request_mode) & CWWidth;
parent_wants_h = (parent_idea->request_mode) & CWHeight;
if (parent_wants_w)
nw = parent_idea->width;
else
nw = MultiListWidth(mlw);
if (parent_wants_h)
nh = parent_idea->height;
else
nh = MultiListHeight(mlw);
our_idea->request_mode = 0;
if (!parent_wants_w && !parent_wants_h)
return XtGeometryYes;
we_changed_size = Layout(mlw, !parent_wants_w, !parent_wants_h, &nw, &nh);
our_idea->request_mode |= (CWWidth | CWHeight);
our_idea->width = nw;
our_idea->height = nh;
if (we_changed_size)
return XtGeometryAlmost;
else
return XtGeometryYes;
} /* End PreferredGeometry */
/*---------------------------------------------------------------------------*
Resize(mlw)
This function is called when the widget is being resized. It
recalculates the layout of the widget.
*---------------------------------------------------------------------------*/
static void Resize(mlw) XfwfMultiListWidget mlw;
{
Dimension width, height;
width = MultiListWidth(mlw);
height = MultiListHeight(mlw);
Layout(mlw, False, False, &width, &height);
} /* End Resize */
/*---------------------------------------------------------------------------*
SetValues(cpl,rpl,npl)
This routine is called when the user is changing resources. <cpl>
is the current widget before the user's changes have been instituted.
<rpl> includes the original changes as requested by the user. <npl>
is the new resulting widget with the requested changes and with all
superclass changes already made.
*---------------------------------------------------------------------------*/
/*ARGSUSED*/
static Boolean SetValues(cpl, rpl, npl) XfwfMultiListWidget cpl, rpl, npl;
{
Boolean redraw, recalc;
redraw = False;
recalc = False;
/* Graphic Context Changes */
if ((MultiListFG(cpl) != MultiListFG(npl)) ||
(MultiListBG(cpl) != MultiListBG(npl)) ||
(MultiListHighlightFG(cpl) != MultiListHighlightFG(npl)) ||
(MultiListHighlightBG(cpl) != MultiListHighlightBG(npl)) ||
(MultiListFont(cpl) != MultiListFont(npl))) {
XtDestroyGC(MultiListEraseGC(cpl));
XtDestroyGC(MultiListDrawGC(cpl));
XtDestroyGC(MultiListHighlightForeGC(cpl));
XtDestroyGC(MultiListHighlightBackGC(cpl));
XtDestroyGC(MultiListGrayGC(cpl));
CreateNewGCs(npl);
redraw = True;
}
/* Changes That Require Redraw */
if ((MultiListSensitive(cpl) != MultiListSensitive(npl)) ||
(MultiListAncesSensitive(cpl) != MultiListAncesSensitive(npl)))
redraw = True;
/* Changes That Require Selection Changes */
if ((MultiListMaxSelectable(cpl) != MultiListMaxSelectable(npl)))
XtWarning("Dynamic change to maxSelectable unimplemented");
/* Changes That Require Data Initialization */
if ((MultiListList(cpl) != MultiListList(npl)) ||
(MultiListNumItems(cpl) != MultiListNumItems(npl)) ||
(MultiListSensitiveArray(cpl) != MultiListSensitiveArray(npl))) {
DestroyOldData(cpl);
InitializeNewData(npl);
recalc = True;
redraw = True;
}
/* Changes That Require Recalculating Coordinates */
if ((MultiListWidth(cpl) != MultiListWidth(npl)) ||
(MultiListHeight(cpl) != MultiListHeight(npl)) ||
(MultiListColumnSpace(cpl) != MultiListColumnSpace(npl)) ||
(MultiListRowSpace(cpl) != MultiListRowSpace(npl)) ||
(MultiListDefaultCols(cpl) != MultiListDefaultCols(npl)) ||
((MultiListForceCols(cpl) != MultiListForceCols(npl)) &&
(MultiListNumCols(cpl) != MultiListNumCols(npl))) ||
(MultiListRowMajor(cpl) != MultiListRowMajor(npl)) ||
(MultiListFont(cpl) != MultiListFont(npl)) ||
(MultiListLongest(cpl) != MultiListLongest(npl))) {
recalc = True;
redraw = True;
}
if (MultiListColWidth(cpl) != MultiListColWidth(npl)) {
XtWarning("columnWidth Resource Is Read-Only");
MultiListColWidth(npl) = MultiListColWidth(cpl);
}
if (MultiListRowHeight(cpl) != MultiListRowHeight(npl)) {
XtWarning("rowHeight Resource Is Read-Only");
MultiListRowHeight(npl) = MultiListRowHeight(cpl);
}
if (recalc)
RecalcCoords(npl, !MultiListWidth(npl), !MultiListHeight(npl));
if (!XtIsRealized((Widget)cpl))
return False;
else
return redraw;
} /* End SetValues */
/*===========================================================================*
D A T A I N I T I A L I Z A T I O N
*===========================================================================*/
/*---------------------------------------------------------------------------*
DestroyOldData(mlw)
This routine frees the internal list item array and sets the
item count to 0. This is normally done immediately before
calling InitializeNewData() to rebuild the internal item
array from new user specified arrays.
*---------------------------------------------------------------------------*/
static void DestroyOldData(mlw) XfwfMultiListWidget mlw;
{
int i;
if (MultiListItemArray(mlw) != NULL) { /* Free Old List */
for (i = 0; i < MultiListNumItems(mlw); i++)
free(MultiListItemString(MultiListNthItem(mlw, i)));
free((char *)MultiListItemArray(mlw));
}
if (MultiListSelArray(mlw) != NULL)
free((char *)MultiListSelArray(mlw));
MultiListSelArray(mlw) = NULL;
MultiListNumSelected(mlw) = 0;
MultiListItemArray(mlw) = NULL;
MultiListNumItems(mlw) = 0;
} /* End DestroyOldData */
/*---------------------------------------------------------------------------*
InitializeNewData(mlw)
This routine takes a MultiList widget <mlw> and builds up new
data item tables based on the string list and the sensitivity array.
All previous data should have already been freed. If the number
of items is 0, they will be counted, so the array must be NULL
terminated. If the list of strings is NULL, this is treated as
a list of 0 elements. If the sensitivity array is NULL, all
items are treated as sensitive.
When this routine is done, the string list and sensitivity array
fields will all be set to NULL, and the widget will not reference
them again.
*---------------------------------------------------------------------------*/
static void InitializeNewData(mlw) XfwfMultiListWidget mlw;
{
int i;
XfwfMultiListItem *item;
String *string_array;
string_array = MultiListList(mlw);
if (string_array == NULL)
MultiListNumItems(mlw) = 0;
if (MultiListNumItems(mlw) == 0) { /* Count Elements */
if (string_array == NULL) /* No elements */
MultiListNumItems(mlw) = 0;
else {
for (i = 0; string_array[i] != NULL; i++)
;
MultiListNumItems(mlw) = i;
}
}
if (MultiListNumItems(mlw) == 0) /* No Items */
MultiListItemArray(mlw) = NULL;
else {
MultiListItemArray(mlw) =
TypeAlloc(XfwfMultiListItem, MultiListNumItems(mlw));
for (i = 0; i < MultiListNumItems(mlw); i++) {
item = MultiListNthItem(mlw, i);
if (MultiListSensitiveArray(mlw) == NULL ||
(MultiListSensitiveArray(mlw)[i] == True))
MultiListItemSensitive(item) = True;
else
MultiListItemSensitive(item) = False;
MultiListItemString(item) = StrCopy(string_array[i]);
MultiListItemHighlighted(item) = False;
}
}
if (MultiListMaxSelectable(mlw) == 0) {
MultiListSelArray(mlw) = NULL;
MultiListNumSelected(mlw) = 0;
} else {
MultiListSelArray(mlw) = TypeAlloc(int, MultiListMaxSelectable(mlw));
MultiListNumSelected(mlw) = 0;
}
MultiListList(mlw) = NULL;
MultiListSensitiveArray(mlw) = NULL;
} /* End InitializeNewData */
/*---------------------------------------------------------------------------*
CreateNewGCs(mlw)
This routine takes a MultiList widget <mlw> and creates a new set of
graphic contexts for the widget based on the colors, fonts, etc.
in the widget. Any previous GCs are assumed to have already been
destroyed.
*---------------------------------------------------------------------------*/
static void CreateNewGCs(mlw) XfwfMultiListWidget mlw;
{
XGCValues values;
unsigned int attribs;
attribs = GCForeground | GCBackground | GCFont;
values.foreground = MultiListFG(mlw);
values.background = MultiListBG(mlw);
values.font = MultiListFont(mlw)->fid;
MultiListDrawGC(mlw) = XtGetGC((Widget)mlw, attribs, &values);
values.foreground = MultiListBG(mlw);
MultiListEraseGC(mlw) = XtGetGC((Widget)mlw, attribs, &values);
values.foreground = MultiListHighlightFG(mlw);
values.background = MultiListHighlightBG(mlw);
MultiListHighlightForeGC(mlw) = XtGetGC((Widget)mlw, attribs, &values);
values.foreground = MultiListHighlightBG(mlw);
values.background = MultiListHighlightBG(mlw);
MultiListHighlightBackGC(mlw) = XtGetGC((Widget)mlw, attribs, &values);
attribs |= GCTile | GCFillStyle;
values.foreground = MultiListFG(mlw);
values.background = MultiListBG(mlw);
values.fill_style = FillTiled;
values.tile = XmuCreateStippledPixmap(XtScreen(mlw), MultiListFG(mlw),
MultiListBG(mlw), MultiListDepth(mlw));
MultiListGrayGC(mlw) = XtGetGC((Widget)mlw, attribs, &values);
} /* End CreateNewGCs */
/*===========================================================================*
L A Y O U T A N D G E O M E T R Y M A N A G E M E N T
*===========================================================================*/
/*---------------------------------------------------------------------------*
RecalcCoords(mlw,width_changeable,height_changeable)
This routine takes a MultiList widget <mlw> and recalculates
the coordinates, and item placement based on the current
width, height, and list of items. The <width_changeable> and
<height_changeable> indicate if the width and/or height can
be arbitrarily set.
This routine requires that the internal list data be initialized.
*---------------------------------------------------------------------------*/
#if NeedFunctionPrototypes
static void RecalcCoords(XfwfMultiListWidget mlw, Boolean width_changeable,
Boolean height_changeable)
#else
static void RecalcCoords(mlw, width_changeable,
height_changeable) XfwfMultiListWidget mlw;
Boolean width_changeable, height_changeable;
#endif
{
String str;
Dimension width, height;
register int i, text_width;
width = MultiListWidth(mlw);
height = MultiListHeight(mlw);
if (MultiListNumItems(mlw) != 0 && MultiListLongest(mlw) == 0) {
for (i = 0; i < MultiListNumItems(mlw); i++) {
str = MultiListItemString(MultiListNthItem(mlw, i));
text_width = FontW(MultiListFont(mlw), str);
MultiListLongest(mlw) = max(MultiListLongest(mlw), text_width);
}
}
if (Layout(mlw, width_changeable, height_changeable, &width, &height))
NegotiateSizeChange(mlw, width, height);
} /* End RecalcCoords */
/*---------------------------------------------------------------------------*
NegotiateSizeChange(mlw,width,height)
This routine tries to change the MultiList widget <mlw> to have the
new size <width> by <height>. A negotiation will takes place
to try to change the size. The resulting size is not necessarily
the requested size.
*---------------------------------------------------------------------------*/
#if NeedFunctionPrototypes
static void NegotiateSizeChange(XfwfMultiListWidget mlw, Dimension width,
Dimension height)
#else
static void NegotiateSizeChange(mlw, width, height) XfwfMultiListWidget mlw;
Dimension width, height;
#endif
{
int attempt_number;
Boolean w_fixed, h_fixed;
Dimension *w_ptr, *h_ptr;
XtWidgetGeometry request, reply;
request.request_mode = CWWidth | CWHeight;
request.width = width;
request.height = height;
for (attempt_number = 1; attempt_number <= 3; attempt_number++) {
switch (XtMakeGeometryRequest((Widget)mlw, &request, &reply)) {
case XtGeometryYes:
case XtGeometryNo:
return;
case XtGeometryAlmost:
switch (attempt_number) {
case 1:
w_fixed = (request.width != reply.width);
h_fixed = (request.height != reply.height);
w_ptr = &(reply.width);
h_ptr = &(reply.height);
Layout(mlw, !w_fixed, !h_fixed, w_ptr, h_ptr);
break;
case 2:
w_ptr = &(reply.width);
h_ptr = &(reply.height);
Layout(mlw, False, False, w_ptr, h_ptr);
break;
case 3:
return;
}
break;
default:
XtAppWarning(XtWidgetToApplicationContext((Widget)mlw),
"MultiList Widget: Unknown geometry return.");
break;
}
request = reply;
}
} /* End NegotiateSizeChange */
/*---------------------------------------------------------------------------*
Boolean Layout(mlw,w_changeable,h_changeable,w_ptr,h_ptr)
This routine tries to generate a layout for the MultiList widget
<mlw>. The Layout routine is free to arbitrarily set the width
or height if the corresponding variables <w_changeable> and
<h_changeable> are set True. Otherwise the original width or
height in <w_ptr> and <h_ptr> are used as fixed values. The
resulting new width and height are stored back through the
<w_ptr> and <h_ptr> pointers. False is returned if no size
change was done, True is returned otherwise.
*---------------------------------------------------------------------------*/
#if NeedFunctionPrototypes
static Boolean Layout(XfwfMultiListWidget mlw, Boolean w_changeable,
Boolean h_changeable, Dimension *w_ptr, Dimension *h_ptr)
#else
static Boolean Layout(mlw, w_changeable, h_changeable, w_ptr,
h_ptr) XfwfMultiListWidget mlw;
Boolean w_changeable, h_changeable;
Dimension *w_ptr, *h_ptr;
#endif
{
Boolean size_changed = False;
/*
* If force columns is set, then always use the number
* of columns specified by default_cols.
*/
MultiListColWidth(mlw) = MultiListLongest(mlw) + MultiListColumnSpace(mlw);
MultiListRowHeight(mlw) = FontH(MultiListFont(mlw)) + MultiListRowSpace(mlw);
if (MultiListForceCols(mlw)) {
MultiListNumCols(mlw) = max(MultiListDefaultCols(mlw), 1);
if (MultiListNumItems(mlw) == 0)
MultiListNumRows(mlw) = 1;
else
MultiListNumRows(mlw) =
(MultiListNumItems(mlw) - 1) / MultiListNumCols(mlw) + 1;
if (w_changeable) {
*w_ptr = MultiListNumCols(mlw) * MultiListColWidth(mlw);
size_changed = True;
} else
MultiListColWidth(mlw) = *w_ptr / (Dimension)MultiListNumCols(mlw);
if (h_changeable) {
*h_ptr = MultiListNumRows(mlw) * MultiListRowHeight(mlw);
size_changed = True;
}
return size_changed;
}
/*
* If both width and height are free to change then use
* default_cols to determine the number of columns and set
* the new width and height to just fit the window.
*/
if (w_changeable && h_changeable) {
MultiListNumCols(mlw) = max(MultiListDefaultCols(mlw), 1);
if (MultiListNumItems(mlw) == 0)
MultiListNumRows(mlw) = 1;
else
MultiListNumRows(mlw) =
(MultiListNumItems(mlw) - 1) / MultiListNumCols(mlw) + 1;
*w_ptr = MultiListNumCols(mlw) * MultiListColWidth(mlw);
*h_ptr = MultiListNumRows(mlw) * MultiListRowHeight(mlw);
return True;
}
/*
* If the width is fixed then use it to determine the
* number of columns. If the height is free to move
* (width still fixed) then resize the height of the
* widget to fit the current MultiList exactly.
*/
if (!w_changeable) {
MultiListNumCols(mlw) = *w_ptr / MultiListColWidth(mlw);
MultiListNumCols(mlw) = max(MultiListNumCols(mlw), 1);
MultiListNumRows(mlw) =
(MultiListNumItems(mlw) - 1) / MultiListNumCols(mlw) + 1;
MultiListColWidth(mlw) = *w_ptr / (Dimension)MultiListNumCols(mlw);
if (h_changeable) {
*h_ptr = MultiListNumRows(mlw) * MultiListRowHeight(mlw);
size_changed = True;
}
return size_changed;
}
/*
* The last case is xfree and !yfree we use the height to
* determine the number of rows and then set the width to
* just fit the resulting number of columns.
*/
MultiListNumRows(mlw) = *h_ptr / MultiListRowHeight(mlw);
MultiListNumRows(mlw) = max(MultiListNumRows(mlw), 1);
MultiListNumCols(mlw) =
(MultiListNumItems(mlw) - 1) / MultiListNumRows(mlw) + 1;
*w_ptr = MultiListNumCols(mlw) * MultiListColWidth(mlw);
return True;
} /* End Layout */
/*===========================================================================*
R E D R A W R O U T I N E S
*===========================================================================*/
/*---------------------------------------------------------------------------*
RedrawAll(mlw)
This routine simple calls Redisplay to redraw the entire
MultiList widget <mlw>.
*---------------------------------------------------------------------------*/
static void RedrawAll(mlw) XfwfMultiListWidget mlw;
{ Redisplay(mlw, NULL, NULL); } /* End RedrawAll */
/*---------------------------------------------------------------------------*
RedrawItem(mlw,item_index)
This routine redraws the item with index <item_index> in the
MultiList widget <mlw>. If the item number is bad, nothing is drawn.
*---------------------------------------------------------------------------*/
static void RedrawItem(mlw, item_index) XfwfMultiListWidget mlw;
int item_index;
{
int row, column;
if (ItemToRowColumn(mlw, item_index, &row, &column))
RedrawRowColumn(mlw, row, column);
} /* End RedrawItem */
/*---------------------------------------------------------------------------*
RedrawRowColumn(mlw,row,column)
This routine paints the item in row/column position <row>,<column>
on the MultiList widget <mlw>. If the row/column coordinates are
outside the widget, nothing is drawn. If the position is empty,
blank space is drawn.
*---------------------------------------------------------------------------*/
static void RedrawRowColumn(mlw, row, column) XfwfMultiListWidget mlw;
int row, column;
{
GC bg_gc, fg_gc = 0;
XfwfMultiListItem *item = NULL;
int ul_x, ul_y, str_x, str_y, w, h, item_index, has_item, text_h;
if (!XtIsRealized((Widget)mlw))
return;
has_item = RowColumnToItem(mlw, row, column, &item_index);
RowColumnToPixels(mlw, row, column, &ul_x, &ul_y, &w, &h);
if (has_item == False) { /* No Item */
if (MultiListShadeSurplus(mlw))
bg_gc = MultiListGrayGC(mlw);
else
bg_gc = MultiListEraseGC(mlw);
} else {
item = MultiListNthItem(mlw, item_index);
if ((!MultiListSensitive(mlw)) ||
(!MultiListItemSensitive(item))) { /* Insensitive */
if (MultiListItemHighlighted(item)) { /* Selected */
bg_gc = MultiListGrayGC(mlw);
fg_gc = MultiListEraseGC(mlw);
} else { /* !Selected */
bg_gc = MultiListEraseGC(mlw);
fg_gc = MultiListGrayGC(mlw);
}
} else { /* Sensitive */
if (MultiListItemHighlighted(item)) { /* Selected */
bg_gc = MultiListHighlightBackGC(mlw);
fg_gc = MultiListHighlightForeGC(mlw);
} else { /* !Selected */
bg_gc = MultiListEraseGC(mlw);
fg_gc = MultiListDrawGC(mlw);
}
}
}
XFillRectangle(XtDisplay(mlw), XtWindow(mlw), bg_gc, ul_x, ul_y, w, h);
if (has_item == True) {
text_h = min(FontH(MultiListFont(mlw)) + (int)MultiListRowSpace(mlw),
(int)MultiListRowHeight(mlw));
str_x = ul_x + MultiListColumnSpace(mlw) / 2;
str_y = ul_y + FontAscent(MultiListFont(mlw)) +
((int)MultiListRowHeight(mlw) - text_h) / 2;
XDrawString(XtDisplay(mlw), XtWindow(mlw), fg_gc, str_x, str_y,
MultiListItemString(item), strlen(MultiListItemString(item)));
}
} /* End RedrawRowColumn */
/*===========================================================================*
I T E M L O C A T I O N R O U T I N E S
*===========================================================================*/
/*---------------------------------------------------------------------------*
void PixelToRowColumn(mlw,x,y,row_ptr,column_ptr)
This routine takes pixel coordinates <x>, <y> and converts
the pixel coordinate into a row/column coordinate. This row/column
coordinate can then easily be converted into the specific item
in the list via the function RowColumnToItem().
If the pixel lies in blank space outside of the items, the
row & column numbers will be outside of the range of normal
row & columns numbers, but will correspond to the row & column
of the item, if an item was actually there.
*---------------------------------------------------------------------------*/
static void PixelToRowColumn(mlw, x, y, row_ptr,
column_ptr) XfwfMultiListWidget mlw;