/* $Header: /afs/athena.mit.edu/astaff/project/atdev/src/text/RCS/Label.c,v 3.1 91/01/03 17:54:32 crcraig Exp Locker: dot $ */ /******************************************************************* Copyright (C) 1990 by the Massachusetts Institute of Technology Export of this software from the United States of America is assumed to require a specific license from the United States Government. It is the responsibility of any person or organization contemplating export to obtain such a license before exporting. WITHIN THAT CONSTRAINT, 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 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. ***************************************************************** */ #include #include #include #include #ifdef _AtDevelopment_ #include "LabelP.h" #include "AtConverters.h" #else #include #include #endif static void Initialize(); static void Redisplay(); static void Resize(); static void Destroy(); static Boolean SetValues(); static void ClassInitialize(); #define offset(field) XtOffset(AtLabelWidget, label.field) static XtResource resources[] = { {XtNlabelString, XtCLabelString, XtRString, sizeof(String), offset(label_string), XtRString, NULL}, {XtNfontFamily, XtCFontFamily, XtRString, sizeof(String), offset(font_family), XtRString, "new century schoolbook"}, {XtNfontSize, XtCFontSize, XtRFontSize, sizeof(int), offset(font_size), XtRImmediate, (caddr_t)AtFontNORMAL}, {XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel), offset(foreground), XtRString, (caddr_t)XtDefaultForeground}, {XtNhorizontalJustify, XtCHorizontalJustify, XtRAtJustify, sizeof(int), offset(horizontal_justify), XtRImmediate, (caddr_t)AtTextJUSTIFY_CENTER}, {XtNverticalJustify, XtCVerticalJustify, XtRAtJustify, sizeof(int), offset(vertical_justify), XtRImmediate, (caddr_t)AtTextJUSTIFY_CENTER}, {XtNrotate, XtCRotate, XtRBoolean, sizeof(Boolean), offset(rotate), XtRImmediate, (caddr_t)False}, {XtNmarginWidth, XtCMarginWidth, XtRDimension, sizeof(Dimension), offset(margin_width), XtRImmediate, (caddr_t) 4}, {XtNmarginHeight, XtCMarginHeight, XtRDimension, sizeof(Dimension), offset(margin_height), XtRImmediate, (caddr_t) 4}, }; /**************************************************************** * * Full class record constant * ****************************************************************/ AtLabelClassRec atLabelClassRec = { { /* core_class fields */ /* superclass */ (WidgetClass) &widgetClassRec, /* class_name */ "AtLabel", /* widget_size */ sizeof(AtLabelRec), /* 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 */ TRUE, /* 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 */ XtInheritQueryGeometry, /* display_accelerator */ XtInheritDisplayAccelerator, /* extension */ NULL, } }; WidgetClass atLabelWidgetClass = (WidgetClass) &atLabelClassRec; /* ******************* * Initialize () ******************* */ static void Initialize (request, new) AtLabelWidget request, new; { Dimension min_width, min_height; XGCValues values; XtGCMask valueMask; if (new->label.label_string == NULL) new->label.label_string = XtNewString(new->core.name); else new->label.label_string = XtNewString(new->label.label_string); new->label.font_family = XtNewString(new->label.font_family); valueMask = GCForeground | GCBackground; values.foreground = new->label.foreground; values.background = new->core.background_pixel; new->label.label_gc = XtGetGC ((Widget)new, valueMask, &values); new->label.family = AtFontFamilyGet (XtDisplay(new), new->label.font_family); new->label.formated_text = AtTextCreate (new->label.label_string, new->label.family, new->label.font_size); if (new->label.rotate) AtTextRotate (new->label.formated_text); /* calculate ascent and descent of text */ new->label.text_a = AtTextAscent (new->label.formated_text); new->label.text_d = AtTextDescent (new->label.formated_text); new->label.text_h = new->label.text_a + new->label.text_d; /* minimum acceptable width and height for widget */ min_width = (new->label.text_w = AtTextWidth (new->label.formated_text)) + (2 * new->label.margin_width); min_height = new->label.text_h + (2 * new->label.margin_height); if (request->core.width == 0) new->core.width = min_width; if (request->core.height == 0) new->core.height = min_height; Resize(new); } /* ************************ * ClassInitialize () ************************ */ static void ClassInitialize() { /* Register converters */ AtRegisterFontSizeConverter(); AtRegisterJustifyConverter(); } /* ******************* * Resize () ******************* */ static void Resize (w) AtLabelWidget w; { Position x1, y1; /* coordintes of upper left of the bounding box */ Position x2, y2; /* coordintes of lower right of the bounding box */ x1 = w->label.margin_width; y1 = w->label.margin_height; x2 = w->core.width - w->label.margin_width; y2 = w->core.height - w->label.margin_height; switch (w->label.horizontal_justify) { case AtTextJUSTIFY_LEFT: w->label.x = x1; break; case AtTextJUSTIFY_RIGHT: w->label.x = x2 - w->label.text_w; break; case AtTextJUSTIFY_CENTER: w->label.x = (w->core.width - w->label.text_w) / 2; break; } switch (w->label.vertical_justify) { case AtTextJUSTIFY_TOP: w->label.y = y1 + w->label.text_a; break; case AtTextJUSTIFY_BOTTOM: w->label.y = y2 - w->label.text_d; break; case AtTextJUSTIFY_CENTER: w->label.y = (w->core.height - w->label.text_h) / 2 + w->label.text_a; break; } } /* ********************** * SetValues () ********************** */ static Boolean SetValues (current, request, new) AtLabelWidget current, request, new; { XGCValues values; XtGCMask valueMask; Boolean string_changed = FALSE, family_changed = FALSE; Boolean size_changed = FALSE; Boolean Recal = FALSE; /* if true recalculte text_h, text_w, etc... */ if (strcmp (new->label.label_string, current->label.label_string)) { XtFree(current->label.label_string); AtTextDestroy (new->label.formated_text); new->label.label_string = XtNewString(new->label.label_string); string_changed = TRUE; } if (strcasecmp (new->label.font_family, current->label.font_family)) { XtFree(current->label.font_family); AtFontFamilyRelease(new->label.family); new->label.font_family = XtNewString(new->label.font_family); new->label.family = AtFontFamilyGet (XtDisplay(new), new->label.font_family); family_changed = TRUE; } if (new->label.font_size != current->label.font_size) size_changed = TRUE; if (string_changed) { new->label.formated_text = AtTextCreate (new->label.label_string, new->label.family, new->label.font_size); if (new->label.rotate) AtTextRotate (new->label.formated_text); Recal = TRUE; } else if (family_changed || size_changed) { AtTextReformat (new->label.formated_text, new->label.family, new->label.font_size); Recal = TRUE; } /* if text previously horizontal, now rotate 90 degrees */ if ((new->label.rotate != current->label.rotate) && (new->label.rotate)) { if (!string_changed) { /* if changed, everything already set */ AtTextRotate (new->label.formated_text); Recal = TRUE; } } /* if text previously rotated, now set it back to normal */ if ((new->label.rotate != current->label.rotate) && (!new->label.rotate)) if (!string_changed) { /* if changed, everything is already set */ AtTextDestroy (new->label.formated_text); new->label.formated_text = AtTextCreate (new->label.label_string, new->label.family, new->label.font_size); Recal = TRUE; } if (Recal) { /* recalculate ascent, descent, width, and height of text */ new->label.text_a = AtTextAscent (new->label.formated_text); new->label.text_d = AtTextDescent (new->label.formated_text); new->label.text_h = new->label.text_a + new->label.text_d; new->label.text_w = AtTextWidth (new->label.formated_text); } if ((new->label.foreground != current->label.foreground) || (new->core.background_pixel != current->core.background_pixel)) { valueMask = GCForeground | GCBackground; values.foreground = new->label.foreground; values.background = new->core.background_pixel; XtReleaseGC ((Widget)new, new->label.label_gc); new->label.label_gc = XtGetGC ((Widget)new, valueMask, &values); } if ((new->label.horizontal_justify != current->label.horizontal_justify) || (new->label.vertical_justify != current->label.vertical_justify) || (new->label.margin_width != current->label.margin_width) || (new->label.margin_height != current->label.margin_height) || (Recal)) Resize (new); return (True); /* generate an expose event */ } /* ******************** * Redisplay () ******************** */ static void Redisplay (w, event, region) AtLabelWidget w; XEvent *event; Region region; { if (w->core.visible) { /* XSetRegion (XtDisplay(w), w->label.label_gc, region); */ AtTextDraw (XtDisplay (w), XtWindow (w), w->label.label_gc, w->label.formated_text, w->label.x, w->label.y); } } /* ****************** * Destroy () ****************** */ static void Destroy (w) AtLabelWidget w; { XtFree(w->label.label_string); XtFree(w->label.font_family); AtFontFamilyRelease(w->label.family); AtTextDestroy (w->label.formated_text); XtReleaseGC ((Widget)w, w->label.label_gc); }