#ifndef lint static char Xrcsid[] = "$XConsortium: Label.c,v 1.79 90/02/05 16:16:23 jim Exp $"; #endif /* lint */ /*********************************************************** Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts, and the Massachusetts Institute of Technology, Cambridge, Massachusetts. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, 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 names of Digital or MIT not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DIGITAL 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. ******************************************************************/ /* * Label.c - Label widget * */ #define XtStrlen(s) ((s) ? strlen(s) : 0) #include #include #include #include #include #include #include #define streq(a,b) (strcmp( (a), (b) ) == 0) #define MULTI_LINE_LABEL 32767 /**************************************************************** * * Full class record constant * ****************************************************************/ /* Private Data */ #define offset(field) XtOffset(LabelWidget, field) static XtResource resources[] = { {XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel), offset(label.foreground), XtRString, "XtDefaultForeground"}, {XtNfont, XtCFont, XtRFontStruct, sizeof(XFontStruct *), offset(label.font),XtRString, "XtDefaultFont"}, {XtNlabel, XtCLabel, XtRString, sizeof(String), offset(label.label), XtRString, NULL}, {XtNjustify, XtCJustify, XtRJustify, sizeof(XtJustify), offset(label.justify), XtRImmediate, (caddr_t)XtJustifyCenter}, {XtNinternalWidth, XtCWidth, XtRDimension, sizeof(Dimension), offset(label.internal_width), XtRImmediate, (caddr_t)4}, {XtNinternalHeight, XtCHeight, XtRDimension, sizeof(Dimension), offset(label.internal_height), XtRImmediate, (caddr_t)2}, {XtNleftBitmap, XtCLeftBitmap, XtRBitmap, sizeof(Pixmap), offset(label.left_bitmap), XtRImmediate, (caddr_t) None}, {XtNbitmap, XtCPixmap, XtRBitmap, sizeof(Pixmap), offset(label.pixmap), XtRImmediate, (caddr_t)None}, {XtNresize, XtCResize, XtRBoolean, sizeof(Boolean), offset(label.resize), XtRImmediate, (caddr_t)True}, }; static void Initialize(Widget request, Widget wid); static void Resize(Widget w); static void Redisplay(Widget w, XEvent *event, Region region); static Boolean SetValues(Widget current, Widget request, Widget wid, ArgList args, Cardinal *num_args); static void ClassInitialize(); static void Destroy(Widget w); static XtGeometryResult QueryGeometry(Widget w, XtWidgetGeometry *intended, XtWidgetGeometry *preferred); LabelClassRec labelClassRec = { { /* core_class fields */ #define superclass (&simpleClassRec) /* superclass */ (WidgetClass) superclass, /* class_name */ "Label", /* widget_size */ sizeof(LabelRec), /* class_initialize */ ClassInitialize, /* class_part_initialize */ NULL, /* class_inited */ FALSE, /* initialize */ Initialize, /* initialize_hook */ NULL, /* realize */ XtInheritRealize, /* actions */ NULL, /* num_actions */ 0, /* resources */ resources, /* num_resources */ XtNumber(resources), /* xrm_class */ NULLQUARK, /* compress_motion */ TRUE, /* compress_exposure */ TRUE, /* compress_enterleave */ TRUE, /* visible_interest */ FALSE, /* destroy */ Destroy, /* resize */ Resize, /* expose */ Redisplay, /* set_values */ SetValues, /* set_values_hook */ NULL, /* set_values_almost */ XtInheritSetValuesAlmost, /* get_values_hook */ NULL, /* accept_focus */ NULL, /* version */ XtVersion, /* callback_private */ NULL, /* tm_table */ NULL, /* query_geometry */ QueryGeometry, /* display_accelerator */ XtInheritDisplayAccelerator, /* extension */ NULL }, /* Simple class fields initialization */ { /* change_sensitive */ XtInheritChangeSensitive } }; WidgetClass labelWidgetClass = (WidgetClass)&labelClassRec; /**************************************************************** * * Private Procedures * ****************************************************************/ static void ClassInitialize() { extern void XmuCvtStringToJustify(); extern void XmuCvtStringToBitmap(); static XtConvertArgRec screenConvertArg[] = { {XtWidgetBaseOffset, (caddr_t) XtOffset(Widget, core.screen), sizeof(Screen *)} }; XawInitializeWidgetSet(); XtAddConverter( XtRString, XtRJustify, XmuCvtStringToJustify, NULL, 0 ); XtAddConverter("String", "Bitmap", XmuCvtStringToBitmap, screenConvertArg, XtNumber(screenConvertArg)); } /* ClassInitialize */ /* * Calculate width and height of displayed text in pixels */ static void SetTextWidthAndHeight(LabelWidget lw) { register XFontStruct *fs = lw->label.font; char *nl; if (lw->label.pixmap != None) { Window root; int x, y; unsigned int width, height, bw, depth; if (XGetGeometry(XtDisplay(lw), lw->label.pixmap, &root, &x, &y, &width, &height, &bw, &depth)) { lw->label.label_height = height; lw->label.label_width = width; lw->label.label_len = depth; return; } } lw->label.label_height = fs->max_bounds.ascent + fs->max_bounds.descent; if (lw->label.label == NULL) { lw->label.label_len = 0; lw->label.label_width = 0; } else if ((nl = index(lw->label.label, '\n')) != NULL) { char *label; lw->label.label_len = MULTI_LINE_LABEL; lw->label.label_width = 0; for (label = lw->label.label; nl != NULL; nl = index(label, '\n')) { int width = XTextWidth(fs, label, (int)(nl - label)); if (width > lw->label.label_width) lw->label.label_width = width; label = nl + 1; if (*label) lw->label.label_height += fs->max_bounds.ascent + fs->max_bounds.descent; } if (*label) { int width = XTextWidth(fs, label, strlen(label)); if (width > lw->label.label_width) lw->label.label_width = width; } } else { lw->label.label_len = strlen(lw->label.label); lw->label.label_width = XTextWidth(fs, lw->label.label, (int) lw->label.label_len); } } static void GetnormalGC(LabelWidget lw) { XGCValues values; values.foreground = lw->label.foreground; values.background = lw->core.background_pixel; values.font = lw->label.font->fid; values.graphics_exposures = False; lw->label.normal_GC = XtGetGC( (Widget)lw, (unsigned) GCForeground | GCBackground | GCFont | GCGraphicsExposures, &values); } static void GetgrayGC(LabelWidget lw) { XGCValues values; values.foreground = lw->label.foreground; values.background = lw->core.background_pixel; values.font = lw->label.font->fid; values.fill_style = FillTiled; values.tile = XmuCreateStippledPixmap(XtScreen((Widget)lw), lw->label.foreground, lw->core.background_pixel, lw->core.depth); values.graphics_exposures = False; lw->label.stipple = values.tile; lw->label.gray_GC = XtGetGC((Widget)lw, (unsigned) GCForeground | GCBackground | GCFont | GCTile | GCFillStyle | GCGraphicsExposures, &values); } static void compute_bitmap_offsets (LabelWidget lw) { /* * label will be displayed at (internal_width, internal_height + lbm_y) */ if (lw->label.lbm_height != 0) { lw->label.lbm_y = (((int) lw->core.height) - ((int) lw->label.internal_height * 2) - ((int) lw->label.lbm_height)) / 2; } else { lw->label.lbm_y = 0; } } static void set_bitmap_info (LabelWidget lw) { Window root; int x, y; unsigned int bw, depth; if (!(lw->label.left_bitmap && XGetGeometry (XtDisplay(lw), lw->label.left_bitmap, &root, &x, &y, &lw->label.lbm_width, &lw->label.lbm_height, &bw, &depth))) { lw->label.lbm_width = lw->label.lbm_height = 0; } compute_bitmap_offsets (lw); } /* ARGSUSED */ static void Initialize(Widget request, Widget wid) { LabelWidget lw = (LabelWidget) wid; if (lw->label.label == NULL) lw->label.label = XtNewString(lw->core.name); else { lw->label.label = XtNewString(lw->label.label); } GetnormalGC(lw); GetgrayGC(lw); SetTextWidthAndHeight(lw); if (lw->core.height == 0) lw->core.height = lw->label.label_height + 2*lw->label.internal_height; set_bitmap_info (lw); /* need core.height */ if (lw->core.width == 0) /* need label.lbm_width */ lw->core.width = (lw->label.label_width + 2 * lw->label.internal_width + LEFT_OFFSET(lw)); lw->label.label_x = lw->label.label_y = 0; (*XtClass(wid)->core_class.resize) ((Widget)lw); } /* Initialize */ /* * Repaint the widget window */ /* ARGSUSED */ static void Redisplay(Widget w, XEvent *event, Region region) { LabelWidget lw = (LabelWidget) w; GC gc; if (region != NULL && XRectInRegion(region, lw->label.label_x, lw->label.label_y, lw->label.label_width, lw->label.label_height) == RectangleOut) return; gc = XtIsSensitive(w) ? lw->label.normal_GC : lw->label.gray_GC; #ifdef notdef if (region != NULL) XSetRegion(XtDisplay(w), gc, region); #endif /*notdef*/ if (lw->label.pixmap == None) { int len = lw->label.label_len; char *label = lw->label.label; Position y = lw->label.label_y + lw->label.font->max_bounds.ascent; /* display left bitmap */ if (lw->label.left_bitmap && lw->label.lbm_width != 0) { XCopyPlane (XtDisplay(w), lw->label.left_bitmap, XtWindow(w), gc, 0, 0, lw->label.lbm_width, lw->label.lbm_height, (int) lw->label.internal_width, (int) lw->label.internal_height + lw->label.lbm_y, (unsigned long) 1L); } if (len == MULTI_LINE_LABEL) { char *nl; while ((nl = index(label, '\n')) != NULL) { XDrawString( XtDisplay(w), XtWindow(w), gc, lw->label.label_x, y, label, (int)(nl - label)); y += lw->label.font->max_bounds.ascent + lw->label.font->max_bounds.descent; label = nl + 1; } len = strlen(label); } if (len) XDrawString( XtDisplay(w), XtWindow(w), gc, lw->label.label_x, y, label, len); } else if (lw->label.label_len == 1) { /* depth */ XCopyPlane( XtDisplay(w), lw->label.pixmap, XtWindow(w), gc, 0, 0, lw->label.label_width, lw->label.label_height, lw->label.label_x, lw->label.label_y, 1L); } else { XCopyArea( XtDisplay(w), lw->label.pixmap, XtWindow(w), gc, 0, 0, lw->label.label_width, lw->label.label_height, lw->label.label_x, lw->label.label_y); } #ifdef notdef if (region != NULL) XSetClipMask(XtDisplay(w), gc, (Pixmap)None); #endif /* notdef */ } static void _Reposition(register LabelWidget lw, Dimension width, Dimension height, Position *dx, Position *dy) { Position newPos; Position leftedge = lw->label.internal_width + LEFT_OFFSET(lw); switch (lw->label.justify) { case XtJustifyLeft : newPos = leftedge; break; case XtJustifyRight : newPos = width - (lw->label.label_width + lw->label.internal_width); break; case XtJustifyCenter : newPos = (width - lw->label.label_width) / 2; break; } if (newPos < (Position)leftedge) newPos = leftedge; *dx = newPos - lw->label.label_x; lw->label.label_x = newPos; *dy = (newPos = (height - lw->label.label_height) / 2) - lw->label.label_y; lw->label.label_y = newPos; return; } static void Resize(Widget w) { LabelWidget lw = (LabelWidget)w; Position dx, dy; _Reposition(lw, w->core.width, w->core.height, &dx, &dy); compute_bitmap_offsets (lw); } /* * Set specified arguments into widget */ #define PIXMAP 0 #define WIDTH 1 #define HEIGHT 2 #define NUM_CHECKS 3 static Boolean SetValues(Widget current, Widget request, Widget wid, ArgList args, Cardinal *num_args) { LabelWidget curlw = (LabelWidget) current; LabelWidget reqlw = (LabelWidget) request; LabelWidget newlw = (LabelWidget) wid; int i; Boolean was_resized = False, redisplay = False, checks[NUM_CHECKS]; for (i = 0; i < NUM_CHECKS; i++) checks[i] = FALSE; for (i = 0; i < *num_args; i++) { if (streq(XtNbitmap, args[i].name)) checks[PIXMAP] = TRUE; if (streq(XtNwidth, args[i].name)) checks[WIDTH] = TRUE; if (streq(XtNheight, args[i].name)) checks[HEIGHT] = TRUE; } if (newlw->label.label == NULL) { newlw->label.label = newlw->core.name; } /* * resize on bitmap change */ if (curlw->label.left_bitmap != newlw->label.left_bitmap) { was_resized = True; } if (curlw->label.label != newlw->label.label) { if (curlw->label.label != curlw->core.name) XtFree( (char *)curlw->label.label ); if (newlw->label.label != newlw->core.name) { newlw->label.label = XtNewString( newlw->label.label ); } was_resized = True; } if (was_resized || (curlw->label.font != newlw->label.font) || (curlw->label.justify != newlw->label.justify) || checks[PIXMAP]) { SetTextWidthAndHeight(newlw); was_resized = True; } /* recalculate the window size if something has changed. */ if (newlw->label.resize && was_resized) { if ((curlw->core.height == reqlw->core.height) && !checks[HEIGHT]) newlw->core.height = (newlw->label.label_height + 2 * newlw->label.internal_height); set_bitmap_info (newlw); if ((curlw->core.width == reqlw->core.width) && !checks[WIDTH]) newlw->core.width = (newlw->label.label_width + LEFT_OFFSET(newlw) + 2 * newlw->label.internal_width); } if (curlw->label.foreground != newlw->label.foreground || curlw->label.font->fid != newlw->label.font->fid) { XtReleaseGC(wid, curlw->label.normal_GC); XtReleaseGC(wid, curlw->label.gray_GC); XmuReleaseStippledPixmap( XtScreen(current), curlw->label.stipple ); GetnormalGC(newlw); GetgrayGC(newlw); redisplay = True; } if ((curlw->label.internal_width != newlw->label.internal_width) || (curlw->label.internal_height != newlw->label.internal_height) || was_resized) { /* Resize() will be called if geometry changes succeed */ Position dx, dy; _Reposition(newlw, curlw->core.width, curlw->core.height, &dx, &dy); } return was_resized || redisplay || XtIsSensitive(current) != XtIsSensitive(wid); } static void Destroy(Widget w) { LabelWidget lw = (LabelWidget)w; XtFree( lw->label.label ); XtReleaseGC( w, lw->label.normal_GC ); XtReleaseGC( w, lw->label.gray_GC); XmuReleaseStippledPixmap( XtScreen(w), lw->label.stipple ); } static XtGeometryResult QueryGeometry(Widget w, XtWidgetGeometry *intended, XtWidgetGeometry *preferred) { register LabelWidget lw = (LabelWidget)w; preferred->request_mode = CWWidth | CWHeight; preferred->width = (lw->label.label_width + 2 * lw->label.internal_width + LEFT_OFFSET(lw)); preferred->height = lw->label.label_height + 2*lw->label.internal_height; if ( ((intended->request_mode & (CWWidth | CWHeight)) == (CWWidth | CWHeight)) && intended->width == preferred->width && intended->height == preferred->height) return XtGeometryYes; else if (preferred->width == w->core.width && preferred->height == w->core.height) return XtGeometryNo; else return XtGeometryAlmost; }