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Diffstat (limited to 'libXaw/src/List.c')
| -rw-r--r-- | libXaw/src/List.c | 1273 |
1 files changed, 1273 insertions, 0 deletions
diff --git a/libXaw/src/List.c b/libXaw/src/List.c new file mode 100644 index 000000000..54ca5168f --- /dev/null +++ b/libXaw/src/List.c @@ -0,0 +1,1273 @@ +/* $Xorg: List.c,v 1.4 2001/02/09 02:03:44 xorgcvs Exp $ */ + +/* +Copyright 1989, 1994, 1998 The Open Group + +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. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. +*/ +/* $XFree86: xc/lib/Xaw/List.c,v 1.16 2001/01/17 19:42:27 dawes Exp $ */ + +/* + * List.c - List widget + * + * This is a List widget. It allows the user to select an item in a list and + * notifies the application through a callback function. + * + * Created: 8/13/88 + * By: Chris D. Peterson + * MIT X Consortium + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdio.h> +#include <ctype.h> +#include <X11/IntrinsicP.h> +#include <X11/StringDefs.h> +#include <X11/Xmu/Drawing.h> +#include <X11/Xaw/ListP.h> +#include <X11/Xaw/XawInit.h> +#include "Private.h" + +#define HeightLock 1 +#define WidthLock 2 +#define LongestLock 4 + +#define HeightFree(w) !(((ListWidget)(w))->list.freedoms & HeightLock) +#define WidthFree(w) !(((ListWidget)(w))->list.freedoms & WidthLock) +#define LongestFree(w) !(((ListWidget)(w))->list.freedoms & LongestLock) + +#define MaxSize 32767 + +/* + * Class Methods + */ +static void XawListDestroy(Widget); +static void XawListInitialize(Widget, Widget, ArgList, Cardinal*); +static XtGeometryResult XawListQueryGeometry(Widget, XtWidgetGeometry*, + XtWidgetGeometry*); +static void XawListRedisplay(Widget, XEvent*, Region); +static void XawListResize(Widget); +static Boolean XawListSetValues(Widget, Widget, Widget, ArgList, Cardinal*); + +/* + * Prototypes + */ +static void CalculatedValues(Widget); +static void ChangeSize(Widget, unsigned int, unsigned int); +static void ClipToShadowInteriorAndLongest(ListWidget, GC*, unsigned int); +static int CvtToItem(Widget, int, int, int*); +static void FindCornerItems(Widget, XEvent*, int*, int*); +static void GetGCs(Widget); +static void HighlightBackground(Widget, int, int, GC); +static Bool ItemInRectangle(Widget, int, int, int); +static Bool Layout(Widget, Bool, Bool, Dimension*, Dimension*); +static void PaintItemName(Widget, int); +static void ResetList(Widget, Bool, Bool); + +/* + * Actions + */ +static void Notify(Widget, XEvent*, String*, Cardinal*); +static void Set(Widget, XEvent*, String*, Cardinal*); +static void Unset(Widget, XEvent*, String*, Cardinal*); + +/* + * Initialization + */ +static char defaultTranslations[] = +"<Btn1Down>:" "Set()\n" +"<Btn1Up>:" "Notify()\n" +; + +#define offset(field) XtOffsetOf(ListRec, field) +static XtResource resources[] = { + { + XtNforeground, + XtCForeground, + XtRPixel, + sizeof(Pixel), + offset(list.foreground), + XtRString, + XtDefaultForeground + }, + { + XtNcursor, + XtCCursor, + XtRCursor, + sizeof(Cursor), + offset(simple.cursor), + XtRString, + "left_ptr" + }, + { + XtNfont, + XtCFont, + XtRFontStruct, + sizeof(XFontStruct*), + offset(list.font), + XtRString, + XtDefaultFont + }, + { + XtNfontSet, + XtCFontSet, + XtRFontSet, + sizeof(XFontSet), + offset(list.fontset), + XtRString, + XtDefaultFontSet + }, + { + XtNlist, + XtCList, + XtRPointer, + sizeof(char**), + offset(list.list), +#ifdef notyet + XtRStringArray, +#else + XtRString, +#endif + NULL + }, + { + XtNdefaultColumns, + XtCColumns, + XtRInt, + sizeof(int), + offset(list.default_cols), + XtRImmediate, + (XtPointer)2 + }, + { + XtNlongest, + XtCLongest, + XtRInt, + sizeof(int), + offset(list.longest), + XtRImmediate, + (XtPointer)0 + }, + { + XtNnumberStrings, + XtCNumberStrings, + XtRInt, + sizeof(int), + offset(list.nitems), + XtRImmediate, + (XtPointer)0 + }, + { + XtNpasteBuffer, + XtCBoolean, + XtRBoolean, + sizeof(Boolean), + offset(list.paste), + XtRImmediate, + (XtPointer)False + }, + { + XtNforceColumns, + XtCColumns, + XtRBoolean, + sizeof(Boolean), + offset(list.force_cols), + XtRImmediate, + (XtPointer)False + }, + { + XtNverticalList, + XtCBoolean, + XtRBoolean, + sizeof(Boolean), + offset(list.vertical_cols), + XtRImmediate, + (XtPointer)False + }, + { + XtNinternalWidth, + XtCWidth, + XtRDimension, + sizeof(Dimension), + offset(list.internal_width), + XtRImmediate, + (XtPointer)2 + }, + { + XtNinternalHeight, + XtCHeight, + XtRDimension, + sizeof(Dimension), + offset(list.internal_height), + XtRImmediate, + (XtPointer)2 + }, + { + XtNcolumnSpacing, + XtCSpacing, + XtRDimension, + sizeof(Dimension), + offset(list.column_space), + XtRImmediate, + (XtPointer)6 + }, + { + XtNrowSpacing, + XtCSpacing, + XtRDimension, + sizeof(Dimension), + offset(list.row_space), + XtRImmediate, + (XtPointer)2 + }, + { + XtNcallback, + XtCCallback, + XtRCallback, + sizeof(XtPointer), + offset(list.callback), + XtRCallback, + NULL + }, +#ifndef OLDXAW + { + XtNshowCurrent, + XtCBoolean, + XtRBoolean, + sizeof(Boolean), + offset(list.show_current), + XtRImmediate, + (XtPointer)False + }, +#endif +}; +#undef offset + +static XtActionsRec actions[] = { + {"Notify", Notify}, + {"Set", Set}, + {"Unset", Unset}, +}; + +#define Superclass (&simpleClassRec) +ListClassRec listClassRec = { + /* core */ + { + (WidgetClass)Superclass, /* superclass */ + "List", /* class_name */ + sizeof(ListRec), /* widget_size */ + XawInitializeWidgetSet, /* class_initialize */ + NULL, /* class_part_initialize */ + False, /* class_inited */ + XawListInitialize, /* initialize */ + NULL, /* initialize_hook */ + XtInheritRealize, /* realize */ + actions, /* actions */ + XtNumber(actions), /* num_actions */ + resources, /* resources */ + XtNumber(resources), /* num_resources */ + NULLQUARK, /* xrm_class */ + True, /* compress_motion */ + False, /* compress_exposure */ + True, /* compress_enterleave */ + False, /* visible_interest */ + XawListDestroy, /* destroy */ + XawListResize, /* resize */ + XawListRedisplay, /* expose */ + XawListSetValues, /* set_values */ + NULL, /* set_values_hook */ + XtInheritSetValuesAlmost, /* set_values_almost */ + NULL, /* get_values_hook */ + NULL, /* accept_focus */ + XtVersion, /* version */ + NULL, /* callback_private */ + defaultTranslations, /* tm_table */ + XawListQueryGeometry, /* query_geometry */ + }, + /* simple */ + { + XtInheritChangeSensitive, /* change_sensitive */ + }, + /* list */ + { + NULL, /* extension */ + }, +}; + +WidgetClass listWidgetClass = (WidgetClass)&listClassRec; + +/* + * Implementation + */ +static void +GetGCs(Widget w) +{ + XGCValues values; + ListWidget lw = (ListWidget)w; + + values.foreground = lw->list.foreground; + values.font = lw->list.font->fid; + + if (lw->simple.international == True) + lw->list.normgc = XtAllocateGC(w, 0, GCForeground, &values, GCFont, 0); + else + lw->list.normgc = XtGetGC(w, GCForeground | GCFont, &values); + + values.foreground = lw->core.background_pixel; + + if (lw->simple.international == True) + lw->list.revgc = XtAllocateGC(w, 0, GCForeground, &values, GCFont, 0); + else + lw->list.revgc = XtGetGC(w, GCForeground | GCFont, &values); + + values.tile = XmuCreateStippledPixmap(XtScreen(w), + lw->list.foreground, + lw->core.background_pixel, + lw->core.depth); + values.fill_style = FillTiled; + + if (lw->simple.international == True) + lw->list.graygc = XtAllocateGC(w, 0, GCTile | GCFillStyle, + &values, GCFont, 0); + else + lw->list.graygc = XtGetGC(w, GCFont | GCTile | GCFillStyle, &values); +} + +static void +CalculatedValues(Widget w) +{ + int i, len; + ListWidget lw = (ListWidget)w; + + /* If list is NULL then the list will just be the name of the widget */ + if (lw->list.list == NULL) { + lw->list.list = &lw->core.name; + lw->list.nitems = 1; + } + + /* Get number of items */ + if (lw->list.nitems == 0) + for (; lw->list.list[lw->list.nitems] != NULL ; lw->list.nitems++) + ; + + /* Get column width */ + if (LongestFree(lw)) { + lw->list.longest = 0; /* so it will accumulate real longest below */ + + for (i = 0 ; i < lw->list.nitems; i++) { + if (lw->simple.international == True) + len = XmbTextEscapement(lw->list.fontset, lw->list.list[i], + strlen(lw->list.list[i])); + else + len = XTextWidth(lw->list.font, lw->list.list[i], + strlen(lw->list.list[i])); + if (len > lw->list.longest) + lw->list.longest = len; + } + } + + lw->list.col_width = lw->list.longest + lw->list.column_space; +} + +/* + * Function: + * ResetList + * + * Parameters: + * w - list widget + * changex - allow the height or width to change? + * changey - "" + * + * Description: + * Resets the new list when important things change. + * + * Returns: + * True if width or height have been changed + */ +static void +ResetList(Widget w, Bool changex, Bool changey) +{ + Dimension width = XtWidth(w); + Dimension height = XtHeight(w); + + CalculatedValues(w); + + if (Layout(w, changex, changey, &width, &height)) { + if (XtIsComposite(XtParent(w))) + ChangeSize(w, width, height); + else { + XtWidth(w) = width; + XtHeight(w) = height; + } + } +} + +/* + * Function: + * ChangeSize + * + * Parameters: + * w - widget to try change the size of + * + * Description: + * Laysout the widget. + */ +static void +ChangeSize(Widget w, unsigned int width, unsigned int height) +{ + XtWidgetGeometry request, reply; + + request.request_mode = CWWidth | CWHeight; + request.width = width; + request.height = height; + + switch (XtMakeGeometryRequest(w, &request, &reply)) { + case XtGeometryYes: + case XtGeometryNo: + break; + case XtGeometryAlmost: + Layout(w, request.height != reply.height, + request.width != reply.width, &reply.width, &reply.height); + request = reply; + switch (XtMakeGeometryRequest(w, &request, &reply)) { + case XtGeometryYes: + case XtGeometryNo: + break; + case XtGeometryAlmost: + request = reply; + Layout(w, False, False, &request.width, &request.height); + request.request_mode = CWWidth | CWHeight; + XtMakeGeometryRequest(w, &request, &reply); + /*FALLTROUGH*/ + default: + break; + } + /*FALLTROUGH*/ + default: + break; + } +} + +/*ARGSUSED*/ +static void +XawListInitialize(Widget temp1, Widget cnew, ArgList args, Cardinal *num_args) +{ + ListWidget lw = (ListWidget)cnew; + + if (!lw->list.font) XtError("Aborting: no font found\n"); + if (lw->simple.international && !lw->list.fontset) + XtError("Aborting: no fontset found\n"); + + /* + * Initialize all private resources + */ + /* record for posterity if we are free */ + lw->list.freedoms = ((XtWidth(lw) != 0) * WidthLock + + (XtHeight(lw) != 0) * HeightLock + + (lw->list.longest != 0) * LongestLock); + + GetGCs(cnew); + + /* Set row height, based on font or fontset */ + if (lw->simple.international == True) + lw->list.row_height = + XExtentsOfFontSet(lw->list.fontset)->max_ink_extent.height + + lw->list.row_space; + else + lw->list.row_height = lw->list.font->max_bounds.ascent + + lw->list.font->max_bounds.descent + + lw->list.row_space; + + ResetList(cnew, WidthFree(lw), HeightFree(lw)); + + lw->list.highlight = lw->list.is_highlighted = NO_HIGHLIGHT; +} + +/* + * Function: + * CvtToItem + * + * Parameters: + * w - list widget + * xloc - x location + * yloc - y location + * + * Description: + * Converts Xcoord to item number of item containing that point. + * + * Returns: + * Item number + */ +static int +CvtToItem(Widget w, int xloc, int yloc, int *item) +{ + int one, another; + ListWidget lw = (ListWidget)w; + int ret_val = OKAY; + + if (lw->list.vertical_cols) { + one = lw->list.nrows * ((xloc - (int)lw->list.internal_width) + / lw->list.col_width); + another = (yloc - (int)lw->list.internal_height) / lw->list.row_height; + /* If out of range, return minimum possible value */ + if (another >= lw->list.nrows) { + another = lw->list.nrows - 1; + ret_val = OUT_OF_RANGE; + } + } + else { + one = (lw->list.ncols * ((yloc - (int)lw->list.internal_height) + / lw->list.row_height)); + /* If in right margin handle things right */ + another = (xloc - (int)lw->list.internal_width) / lw->list.col_width; + if (another >= lw->list.ncols) { + another = lw->list.ncols - 1; + ret_val = OUT_OF_RANGE; + } + } + if (xloc < 0 || yloc < 0) + ret_val = OUT_OF_RANGE; + if (one < 0) + one = 0; + if (another < 0) + another = 0; + *item = one + another; + if (*item >= lw->list.nitems) + return (OUT_OF_RANGE); + + return (ret_val); +} + +/* + * Function: + * FindCornerItems + * + * Arguments: + * w - list widget + * event - event structure that has the rectangle it it + * ul_ret - the corners (return) + * lr_ret - "" + * + * Description: + * Find the corners of the rectangle in item space. + */ +static void +FindCornerItems(Widget w, XEvent *event, int *ul_ret, int *lr_ret) +{ + int xloc, yloc; + + xloc = event->xexpose.x; + yloc = event->xexpose.y; + CvtToItem(w, xloc, yloc, ul_ret); + xloc += event->xexpose.width; + yloc += event->xexpose.height; + CvtToItem(w, xloc, yloc, lr_ret); +} + +/* + * Function: + * ItemInRectangle + * + * Parameters: + * w - list widget + * ul - corners of the rectangle in item space + * lr - "" + * item - item to check + * + * Returns: + * True if the item passed is in the given rectangle + */ +static Bool +ItemInRectangle(Widget w, int ul, int lr, int item) +{ + ListWidget lw = (ListWidget)w; + int mod_item; + int things; + + if (item < ul || item > lr) + return (False); + if (lw->list.vertical_cols) + things = lw->list.nrows; + else + things = lw->list.ncols; + + mod_item = item % things; + if ((mod_item >= ul % things) && (mod_item <= lr % things)) + return (True); + + return (False); +} + +/* HighlightBackground() + * + * Paints the color of the background for the given item. It performs + * clipping to the interior of internal_width/height by hand, as its a + * simple calculation and probably much faster than using Xlib and a clip mask. + * + * x, y - ul corner of the area item occupies. + * gc - the gc to use to paint this rectangle + */ +static void +HighlightBackground(Widget w, int x, int y, GC gc) +{ + ListWidget lw = (ListWidget)w; + Dimension width = lw->list.col_width; + Dimension height = lw->list.row_height; + Dimension frame_limited_width = XtWidth(w) - lw->list.internal_width - x; + Dimension frame_limited_height= XtHeight(w) - lw->list.internal_height - y; + + /* Clip the rectangle width and height to the edge of the drawable area */ + if (width > frame_limited_width) + width = frame_limited_width; + if (height > frame_limited_height) + height = frame_limited_height; + + /* Clip the rectangle x and y to the edge of the drawable area */ + if (x < lw->list.internal_width) { + width = width - (lw->list.internal_width - x); + x = lw->list.internal_width; + } + if (y < lw->list.internal_height) { + height = height - (lw->list.internal_height - y); + y = lw->list.internal_height; + } + + if (gc == lw->list.revgc && lw->core.background_pixmap != XtUnspecifiedPixmap) + XClearArea(XtDisplay(w), XtWindow(w), x, y, width, height, False); + else + XFillRectangle(XtDisplay(w), XtWindow(w), gc, x, y, width, height); +} + + +/* ClipToShadowInteriorAndLongest() + * + * Converts the passed gc so that any drawing done with that GC will not + * write in the empty margin (specified by internal_width/height) (which also + * prevents erasing the shadow. It also clips against the value longest. + * If the user doesn't set longest, this has no effect (as longest is the + * maximum of all item lengths). If the user does specify, say, 80 pixel + * columns, though, this prevents items from overwriting other items. + */ +static void +ClipToShadowInteriorAndLongest(ListWidget lw, GC *gc_p, unsigned int x) +{ + XRectangle rect; + + rect.x = x; + rect.y = lw->list.internal_height; + rect.height = XtHeight(lw) - (lw->list.internal_height << 1); + rect.width = XtWidth(lw) - lw->list.internal_width - x; + if (rect.width > lw->list.longest) + rect.width = lw->list.longest; + + XSetClipRectangles(XtDisplay((Widget)lw), *gc_p, 0, 0, &rect, 1, YXBanded); +} + +static void +PaintItemName(Widget w, int item) +{ + char *str; + GC gc; + int x, y, str_y; + ListWidget lw = (ListWidget)w; + XFontSetExtents *ext = XExtentsOfFontSet(lw->list.fontset); + + if (!XtIsRealized(w) || item > lw->list.nitems) + return; + + if (lw->list.vertical_cols) { + x = lw->list.col_width * (item / lw->list.nrows) + + lw->list.internal_width; + y = lw->list.row_height * (item % lw->list.nrows) + + lw->list.internal_height; + } + else { + x = lw->list.col_width * (item % lw->list.ncols) + + lw->list.internal_width; + y = lw->list.row_height * (item / lw->list.ncols) + + lw->list.internal_height; + } + + if ( lw->simple.international == True ) + str_y = y + XawAbs(ext->max_ink_extent.y); + else + str_y = y + lw->list.font->max_bounds.ascent; + + if (item == lw->list.is_highlighted) { + if (item == lw->list.highlight) { + gc = lw->list.revgc; + HighlightBackground(w, x, y, lw->list.normgc); + } + else { + if (XtIsSensitive(w)) + gc = lw->list.normgc; + else + gc = lw->list.graygc; + HighlightBackground(w, x, y, lw->list.revgc); + lw->list.is_highlighted = NO_HIGHLIGHT; + } + } + else { + if (item == lw->list.highlight) { + gc = lw->list.revgc; + HighlightBackground(w, x, y, lw->list.normgc); + lw->list.is_highlighted = item; + } + else { + if (XtIsSensitive(w)) + gc = lw->list.normgc; + else + gc = lw->list.graygc; + } + } + + /* List's overall width contains the same number of inter-column + column_space's as columns. There should thus be a half + column_width margin on each side of each column. + The row case is symmetric */ + + x += lw->list.column_space >> 1; + str_y += lw->list.row_space >> 1; + + str = lw->list.list[item]; /* draw it */ + + ClipToShadowInteriorAndLongest(lw, &gc, x); + + if (lw->simple.international == True) + XmbDrawString(XtDisplay(w), XtWindow(w), lw->list.fontset, + gc, x, str_y, str, strlen(str)); + else + XDrawString(XtDisplay(w), XtWindow(w), gc, x, str_y, str, strlen(str)); + + XSetClipMask(XtDisplay(w), gc, None); +} + +static void +XawListRedisplay(Widget w, XEvent *event, Region region) +{ + int item; /* an item to work with */ + int ul_item, lr_item; /* corners of items we need to paint */ + ListWidget lw = (ListWidget)w; + + if (event == NULL) { + ul_item = 0; + lr_item = lw->list.nrows * lw->list.ncols - 1; + XClearWindow(XtDisplay(w), XtWindow(w)); + } + else + FindCornerItems(w, event, &ul_item, &lr_item); + + if (Superclass->core_class.expose) + (Superclass->core_class.expose)(w, event, region); + + for (item = ul_item; item <= lr_item && item < lw->list.nitems; item++) + if (ItemInRectangle(w, ul_item, lr_item, item)) + PaintItemName(w, item); +} + +/* XawListQueryGeometry() + * + * This tells the parent what size we would like to be + * given certain constraints. + * w - the widget. + * intended - what the parent intends to do with us. + * requested - what we want to happen */ +static XtGeometryResult +XawListQueryGeometry(Widget w, XtWidgetGeometry *intended, + XtWidgetGeometry *requested) +{ + Dimension new_width, new_height; + Bool change, width_req, height_req; + + width_req = intended->request_mode & CWWidth; + height_req = intended->request_mode & CWHeight; + + if (width_req) + new_width = intended->width; + else + new_width = XtWidth(w); + + if (height_req) + new_height = intended->height; + else + new_height = XtHeight(w); + + requested->request_mode = 0; + + /* + * We only care about our height and width + */ + if (!width_req && !height_req) + return (XtGeometryYes); + + change = Layout(w, !width_req, !height_req, &new_width, &new_height); + + requested->request_mode |= CWWidth; + requested->width = new_width; + requested->request_mode |= CWHeight; + requested->height = new_height; + + if (change) + return (XtGeometryAlmost); + + return (XtGeometryYes); +} + +static void +XawListResize(Widget w) +{ + Dimension width, height; + + width = XtWidth(w); + height = XtHeight(w); + + if (Layout(w, False, False, &width, &height)) + XtAppWarning(XtWidgetToApplicationContext(w), + "List Widget: Size changed when it shouldn't " + "have when resising."); +} + +/* Layout() + * + * lays out the item in the list. + * w - the widget. + * xfree, yfree - True if we are free to resize the widget in + * this direction. + * width, height- the is the current width and height that we are going + * we are going to layout the list widget to, + * depending on xfree and yfree of course. + * + * Return: + * True if width or height have been changed */ +static Bool +Layout(Widget w, Bool xfree, Bool yfree, Dimension *width, Dimension *height) +{ + ListWidget lw = (ListWidget)w; + Bool change = False; + unsigned long width2 = 0, height2 = 0; + + /* + * If force columns is set then always use number of columns specified + * by default_cols + */ + if (lw->list.force_cols) { + lw->list.ncols = lw->list.default_cols; + if (lw->list.ncols <= 0) + lw->list.ncols = 1; + lw->list.nrows = ((lw->list.nitems - 1) / lw->list.ncols) + 1; + if (xfree) { + /* this counts the same number + of inter-column column_space 's as columns. There should thus + be a half column_space margin on each side of each column...*/ + width2 = lw->list.ncols * lw->list.col_width + + (lw->list.internal_width << 1); + change = True; + } + if (yfree) { + height2 = lw->list.nrows * lw->list.row_height + + (lw->list.internal_height << 1); + change = True; + } + } + + /* + * If both width and height are free to change the use default_cols + * to determine the number columns and set new width and height to + * just fit the window + */ + else if (xfree && yfree) { + lw->list.ncols = lw->list.default_cols; + if (lw->list.ncols <= 0) { + int wid = (int)XtWidth(lw) - (int)(lw->list.internal_width << 1) + + (int)lw->list.column_space; + + if (wid <= 0 || lw->list.col_width <= 0 + || (lw->list.ncols = wid / lw->list.col_width) <= 0) + lw->list.ncols = 1; + } + width2 = lw->list.ncols * lw->list.col_width + + (lw->list.internal_width << 1); + height2 = (lw->list.nrows * lw->list.row_height) + + (lw->list.internal_height << 1); + change = 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 list exactly + */ + else if (!xfree) { + lw->list.ncols = ((int)(*width - (lw->list.internal_width << 1)) + / (int)lw->list.col_width); + if (lw->list.ncols <= 0) + lw->list.ncols = 1; + lw->list.nrows = ((lw->list.nitems - 1) / lw->list.ncols) + 1; + if (yfree) { + height2 = lw->list.nrows * lw->list.row_height + + (lw->list.internal_height << 1); + change = True; + } + } + + /* + * 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 + */ + else if (!yfree) { + lw->list.nrows = ((int)(*height - (lw->list.internal_height << 1)) + / (int)lw->list.row_height); + if (lw->list.nrows <= 0) + lw->list.nrows = 1; + lw->list.ncols = ((lw->list.nitems - 1) / lw->list.nrows) + 1; + width2 = lw->list.ncols * lw->list.col_width + + (lw->list.internal_width << 1); + change = True; + } + + if (!lw->list.force_cols && lw->list.nrows) { + /*CONSTCOND*/ + while (1) { + lw->list.nrows = ((lw->list.nitems - 1) / lw->list.ncols) + 1; + width2 = lw->list.ncols * lw->list.col_width + + (lw->list.internal_width << 1); + height2 = lw->list.nrows * lw->list.row_height + + (lw->list.internal_height << 1); + if (width2 >= MaxSize && height2 >= MaxSize) + break; + if (height2 > MaxSize) + ++lw->list.ncols; + else if (width2 > MaxSize && lw->list.ncols > 1) + --lw->list.ncols; + else + break; + } + } + if (width2) + *width = width2; + if (height2) + *height = height2; + + return (change); +} + +/* Notify() - Action + * + * Notifies the user that a button has been pressed, and + * calls the callback; if the XtNpasteBuffer resource is true + * then the name of the item is also put in CUT_BUFFER0 */ +/*ARGSUSED*/ +static void +Notify(Widget w, XEvent *event, String *params, Cardinal *num_params) +{ + ListWidget lw = (ListWidget)w; + int item, item_len; + XawListReturnStruct ret_value; + + /* + * Find item and if out of range then unhighlight and return + * + * If the current item is unhighlighted then the user has aborted the + * notify, so unhighlight and return + */ + if ((CvtToItem(w, event->xbutton.x, event->xbutton.y, &item) == OUT_OF_RANGE) + || lw->list.highlight != item) { +#ifndef OLDXAW + if (!lw->list.show_current || lw->list.selected == NO_HIGHLIGHT) + XawListUnhighlight(w); + else + XawListHighlight(w, lw->list.selected); +#else + XawListUnhighlight(w); +#endif + return; + } + + item_len = strlen(lw->list.list[item]); + + if (lw->list.paste) /* if XtNpasteBuffer set then paste it */ + XStoreBytes(XtDisplay(w), lw->list.list[item], item_len); + +#ifndef OLDXAW + lw->list.selected = item; +#endif + /* + * Call Callback function + */ + ret_value.string = lw->list.list[item]; + ret_value.list_index = item; + + XtCallCallbacks(w, XtNcallback, (XtPointer)&ret_value); +} + +/* Unset() - Action + * + * unhighlights the current element */ +/*ARGSUSED*/ +static void +Unset(Widget w, XEvent *event, String *params, Cardinal *num_params) +{ + XawListUnhighlight(w); +} + +/* Set() - Action + * + * Highlights the current element */ +/*ARGSUSED*/ +static void +Set(Widget w, XEvent *event, String *params, Cardinal *num_params) +{ + int item; + ListWidget lw = (ListWidget)w; + +#ifndef OLDXAW + lw->list.selected = lw->list.highlight; +#endif + if (CvtToItem(w, event->xbutton.x, event->xbutton.y, &item) == OUT_OF_RANGE) + XawListUnhighlight(w); /* Unhighlight current item */ + else if (lw->list.is_highlighted != item) /* If this item is not */ + XawListHighlight(w, item); /* highlighted then do it */ +} + +/* + * Set specified arguments into widget + */ +/*ARGSUSED*/ +static Boolean +XawListSetValues(Widget current, Widget request, Widget cnew, + ArgList args, Cardinal *num_args) +{ + ListWidget cl = (ListWidget)current; + ListWidget rl = (ListWidget)request; + ListWidget nl = (ListWidget)cnew; + Bool redraw = False; + XFontSetExtents *ext = XExtentsOfFontSet(nl->list.fontset); + + /* If the request height/width is different, lock it. Unless its 0. If + neither new nor 0, leave it as it was. Not in R5 */ + if (XtWidth(nl) != XtWidth(cl)) + nl->list.freedoms |= WidthLock; + if (XtWidth(nl) == 0) + nl->list.freedoms &= ~WidthLock; + + if (XtHeight(nl) != XtHeight(cl)) + nl->list.freedoms |= HeightLock; + if (XtHeight(nl) == 0) + nl->list.freedoms &= ~HeightLock; + + if (nl->list.longest != cl->list.longest) + nl->list.freedoms |= LongestLock; + if (nl->list.longest == 0) + nl->list.freedoms &= ~LongestLock; + + if (cl->list.foreground != nl->list.foreground || + cl->core.background_pixel != nl->core.background_pixel || + cl->list.font != nl->list.font) { + XGCValues values; + + XGetGCValues(XtDisplay(current), cl->list.graygc, GCTile, &values); + XmuReleaseStippledPixmap(XtScreen(current), values.tile); + XtReleaseGC(current, cl->list.graygc); + XtReleaseGC(current, cl->list.revgc); + XtReleaseGC(current, cl->list.normgc); + GetGCs(cnew); + redraw = True; + } + + if (cl->list.font != nl->list.font && cl->simple.international == False) + nl->list.row_height = nl->list.font->max_bounds.ascent + + nl->list.font->max_bounds.descent + + nl->list.row_space; + else if (cl->list.fontset != nl->list.fontset + && cl->simple.international == True) + nl->list.row_height = ext->max_ink_extent.height + nl->list.row_space; + + /* ...If the above two font(set) change checkers above both failed, check + if row_space was altered. If one of the above passed, row_height will + already have been re-calculated */ + else if (cl->list.row_space != nl->list.row_space) { + if (cl->simple.international == True) + nl->list.row_height = ext->max_ink_extent.height + nl->list.row_space; + else + nl->list.row_height = nl->list.font->max_bounds.ascent + + nl->list.font->max_bounds.descent + + nl->list.row_space; + } + + if (XtWidth(cl) != XtWidth(nl) || XtHeight(cl) != XtHeight(nl) + || cl->list.internal_width != nl->list.internal_width + || cl->list.internal_height != nl->list.internal_height + || cl->list.column_space != nl->list.column_space + || cl->list.row_space != nl->list.row_space + || cl->list.default_cols != nl->list.default_cols + || (cl->list.force_cols != nl->list.force_cols + && rl->list.force_cols != nl->list.ncols) + || cl->list.vertical_cols != nl->list.vertical_cols + || cl->list.longest != nl->list.longest + || cl->list.nitems != nl->list.nitems + || cl->list.font != nl->list.font + /* Equiv. fontsets might have different values, but the same fonts, + so the next comparison is sloppy but not dangerous */ + || cl->list.fontset != nl->list.fontset + || cl->list.list != nl->list.list) { + CalculatedValues(cnew); + Layout(cnew, WidthFree(nl), HeightFree(nl), + &nl->core.width, &nl->core.height); + redraw = True; + } + + if (cl->list.list != nl->list.list || cl->list.nitems != nl->list.nitems) + nl->list.is_highlighted = nl->list.highlight = NO_HIGHLIGHT; + + if (cl->core.sensitive != nl->core.sensitive + || cl->core.ancestor_sensitive != nl->core.ancestor_sensitive) { + nl->list.highlight = NO_HIGHLIGHT; + redraw = True; + } + + return (redraw); +} + +static void +XawListDestroy(Widget w) +{ + ListWidget lw = (ListWidget)w; + XGCValues values; + + XGetGCValues(XtDisplay(w), lw->list.graygc, GCTile, &values); + XmuReleaseStippledPixmap(XtScreen(w), values.tile); + XtReleaseGC(w, lw->list.graygc); + XtReleaseGC(w, lw->list.revgc); + XtReleaseGC(w, lw->list.normgc); +} + +/* + * Function: + * XawListChange + * + * Parameters: + * w - list widget + * list - new list + * nitems - number of items in the list + * longest - length (in Pixels) of the longest element in the list + * resize - if True the the list widget will try to resize itself + * + * Description: + * Changes the list being used and shown. + * + * Note: + * If nitems of longest are <= 0 then they will be calculated + * If nitems is <= 0 then the list needs to be NULL terminated + */ +void +XawListChange(Widget w, char **list, int nitems, int longest, +#if NeedWidePrototypes + int resize_it +#else + Boolean resize_it +#endif +) +{ + ListWidget lw = (ListWidget)w; + Dimension new_width = XtWidth(w); + Dimension new_height = XtHeight(w); + + lw->list.list = list; + + if (nitems <= 0) + nitems = 0; + lw->list.nitems = nitems; + if (longest <= 0) + longest = 0; + + /* If the user passes 0 meaning "calculate it", it must be free */ + if (longest != 0) + lw->list.freedoms |= LongestLock; + else + lw->list.freedoms &= ~LongestLock; + + if (resize_it) + lw->list.freedoms &= ~WidthLock & ~HeightLock; + + lw->list.longest = longest; + + CalculatedValues(w); + + if (Layout(w, WidthFree(w), HeightFree(w), &new_width, &new_height)) + ChangeSize(w, new_width, new_height); + + lw->list.is_highlighted = lw->list.highlight = NO_HIGHLIGHT; + if (XtIsRealized(w)) + XawListRedisplay(w, NULL, NULL); +} + +void +XawListUnhighlight(Widget w) +{ + ListWidget lw = (ListWidget)w; + + lw->list.highlight = NO_HIGHLIGHT; + if (lw->list.is_highlighted != NO_HIGHLIGHT) + PaintItemName(w, lw->list.is_highlighted); +} + +void +XawListHighlight(Widget w, int item) +{ + ListWidget lw = (ListWidget)w; + + if (XtIsSensitive(w)) { + lw->list.highlight = item; + if (lw->list.is_highlighted != NO_HIGHLIGHT) + PaintItemName(w, lw->list.is_highlighted); + PaintItemName(w, item); + } +} + +/* + * Function: + * XawListShowCurrent + * + * Parameters: + * w - list widget + * + * Returns: + * Info about the currently highlighted object + */ +XawListReturnStruct * +XawListShowCurrent(Widget w) +{ + ListWidget lw = (ListWidget)w; + XawListReturnStruct *ret_val; + + ret_val = (XawListReturnStruct *)XtMalloc(sizeof(XawListReturnStruct)); + + ret_val->list_index = lw->list.highlight; + if (ret_val->list_index == XAW_LIST_NONE) + ret_val->string = ""; + else + ret_val->string = lw->list.list[ret_val->list_index]; + + return (ret_val); +} |