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578 |
markom |
/*
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* tkMessage.c --
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3 |
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*
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* This module implements a message widgets for the Tk
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* toolkit. A message widget displays a multi-line string
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* in a window according to a particular aspect ratio.
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*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1995 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkMessage.c,v 1.1.1.1 2002-01-16 10:25:52 markom Exp $
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*/
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#include "tkPort.h"
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#include "default.h"
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#include "tkInt.h"
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/*
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* A data structure of the following type is kept for each message
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* widget managed by this file:
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*/
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typedef struct {
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27 |
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Tk_Window tkwin; /* Window that embodies the message. NULL
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* means that the window has been destroyed
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* but the data structures haven't yet been
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* cleaned up.*/
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Display *display; /* Display containing widget. Used, among
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* other things, so that resources can be
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* freed even after tkwin has gone away. */
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Tcl_Interp *interp; /* Interpreter associated with message. */
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Tcl_Command widgetCmd; /* Token for message's widget command. */
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/*
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* Information used when displaying widget:
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*/
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char *string; /* String displayed in message. */
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int numChars; /* Number of characters in string, not
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* including terminating NULL character. */
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char *textVarName; /* Name of variable (malloc'ed) or NULL.
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* If non-NULL, message displays the contents
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* of this variable. */
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Tk_3DBorder border; /* Structure used to draw 3-D border and
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* background. NULL means a border hasn't
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49 |
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* been created yet. */
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int borderWidth; /* Width of border. */
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int relief; /* 3-D effect: TK_RELIEF_RAISED, etc. */
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int highlightWidth; /* Width in pixels of highlight to draw
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* around widget when it has the focus.
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* <= 0 means don't draw a highlight. */
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XColor *highlightBgColorPtr;
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/* Color for drawing traversal highlight
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* area when highlight is off. */
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XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
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Tk_Font tkfont; /* Information about text font, or NULL. */
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XColor *fgColorPtr; /* Foreground color in normal mode. */
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61 |
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int padX, padY; /* User-requested extra space around text. */
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int width; /* User-requested width, in pixels. 0 means
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* compute width using aspect ratio below. */
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int aspect; /* Desired aspect ratio for window
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* (100*width/height). */
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int msgWidth; /* Width in pixels needed to display
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* message. */
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int msgHeight; /* Height in pixels needed to display
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* message. */
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Tk_Anchor anchor; /* Where to position text within window region
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* if window is larger or smaller than
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* needed. */
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Tk_Justify justify; /* Justification for text. */
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GC textGC; /* GC for drawing text in normal mode. */
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Tk_TextLayout textLayout; /* Saved layout information. */
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/*
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* Miscellaneous information:
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80 |
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*/
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Tk_Cursor cursor; /* Current cursor for window, or None. */
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char *takeFocus; /* Value of -takefocus option; not used in
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* the C code, but used by keyboard traversal
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* scripts. Malloc'ed, but may be NULL. */
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86 |
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int flags; /* Various flags; see below for
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87 |
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* definitions. */
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88 |
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} Message;
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/*
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* Flag bits for messages:
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*
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* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
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94 |
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* has already been queued to redraw
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* this window.
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96 |
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* GOT_FOCUS: Non-zero means this button currently
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* has the input focus.
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*/
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100 |
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#define REDRAW_PENDING 1
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#define GOT_FOCUS 4
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102 |
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103 |
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/*
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104 |
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* Information used for argv parsing.
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105 |
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*/
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106 |
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107 |
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static Tk_ConfigSpec configSpecs[] = {
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108 |
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{TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
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109 |
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DEF_MESSAGE_ANCHOR, Tk_Offset(Message, anchor), 0},
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110 |
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{TK_CONFIG_INT, "-aspect", "aspect", "Aspect",
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111 |
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DEF_MESSAGE_ASPECT, Tk_Offset(Message, aspect), 0},
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{TK_CONFIG_BORDER, "-background", "background", "Background",
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DEF_MESSAGE_BG_COLOR, Tk_Offset(Message, border),
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114 |
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TK_CONFIG_COLOR_ONLY},
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{TK_CONFIG_BORDER, "-background", "background", "Background",
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DEF_MESSAGE_BG_MONO, Tk_Offset(Message, border),
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TK_CONFIG_MONO_ONLY},
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{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
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119 |
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(char *) NULL, 0, 0},
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{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
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(char *) NULL, 0, 0},
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122 |
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{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
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DEF_MESSAGE_BORDER_WIDTH, Tk_Offset(Message, borderWidth), 0},
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{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
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DEF_MESSAGE_CURSOR, Tk_Offset(Message, cursor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
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127 |
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(char *) NULL, 0, 0},
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{TK_CONFIG_FONT, "-font", "font", "Font",
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DEF_MESSAGE_FONT, Tk_Offset(Message, tkfont), 0},
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{TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
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DEF_MESSAGE_FG, Tk_Offset(Message, fgColorPtr), 0},
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{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
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"HighlightBackground", DEF_MESSAGE_HIGHLIGHT_BG,
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Tk_Offset(Message, highlightBgColorPtr), 0},
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{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
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DEF_MESSAGE_HIGHLIGHT, Tk_Offset(Message, highlightColorPtr), 0},
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{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
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"HighlightThickness",
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DEF_MESSAGE_HIGHLIGHT_WIDTH, Tk_Offset(Message, highlightWidth), 0},
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{TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
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DEF_MESSAGE_JUSTIFY, Tk_Offset(Message, justify), 0},
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{TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
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DEF_MESSAGE_PADX, Tk_Offset(Message, padX), 0},
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{TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
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DEF_MESSAGE_PADY, Tk_Offset(Message, padY), 0},
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{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
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DEF_MESSAGE_RELIEF, Tk_Offset(Message, relief), 0},
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{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
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DEF_MESSAGE_TAKE_FOCUS, Tk_Offset(Message, takeFocus),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_STRING, "-text", "text", "Text",
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DEF_MESSAGE_TEXT, Tk_Offset(Message, string), 0},
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{TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
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DEF_MESSAGE_TEXT_VARIABLE, Tk_Offset(Message, textVarName),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_PIXELS, "-width", "width", "Width",
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DEF_MESSAGE_WIDTH, Tk_Offset(Message, width), 0},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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159 |
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(char *) NULL, 0, 0}
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160 |
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};
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/*
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* Forward declarations for procedures defined later in this file:
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164 |
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*/
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165 |
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166 |
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static void MessageCmdDeletedProc _ANSI_ARGS_((
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167 |
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ClientData clientData));
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168 |
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static void MessageEventProc _ANSI_ARGS_((ClientData clientData,
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169 |
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XEvent *eventPtr));
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170 |
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static char * MessageTextVarProc _ANSI_ARGS_((ClientData clientData,
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171 |
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Tcl_Interp *interp, char *name1, char *name2,
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172 |
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int flags));
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173 |
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static int MessageWidgetCmd _ANSI_ARGS_((ClientData clientData,
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174 |
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Tcl_Interp *interp, int argc, char **argv));
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175 |
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static void MessageWorldChanged _ANSI_ARGS_((
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176 |
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ClientData instanceData));
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177 |
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static void ComputeMessageGeometry _ANSI_ARGS_((Message *msgPtr));
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178 |
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static int ConfigureMessage _ANSI_ARGS_((Tcl_Interp *interp,
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179 |
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Message *msgPtr, int argc, char **argv,
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180 |
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int flags));
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181 |
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static void DestroyMessage _ANSI_ARGS_((char *memPtr));
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182 |
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static void DisplayMessage _ANSI_ARGS_((ClientData clientData));
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183 |
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184 |
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/*
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185 |
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* The structure below defines message class behavior by means of procedures
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186 |
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* that can be invoked from generic window code.
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187 |
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*/
|
188 |
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|
189 |
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static TkClassProcs messageClass = {
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190 |
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NULL, /* createProc. */
|
191 |
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MessageWorldChanged, /* geometryProc. */
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192 |
|
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NULL /* modalProc. */
|
193 |
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};
|
194 |
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|
195 |
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|
196 |
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/*
|
197 |
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*--------------------------------------------------------------
|
198 |
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*
|
199 |
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* Tk_MessageCmd --
|
200 |
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*
|
201 |
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* This procedure is invoked to process the "message" Tcl
|
202 |
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* command. See the user documentation for details on what
|
203 |
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* it does.
|
204 |
|
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*
|
205 |
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* Results:
|
206 |
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* A standard Tcl result.
|
207 |
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*
|
208 |
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* Side effects:
|
209 |
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* See the user documentation.
|
210 |
|
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*
|
211 |
|
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*--------------------------------------------------------------
|
212 |
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*/
|
213 |
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|
214 |
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int
|
215 |
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Tk_MessageCmd(clientData, interp, argc, argv)
|
216 |
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ClientData clientData; /* Main window associated with
|
217 |
|
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* interpreter. */
|
218 |
|
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Tcl_Interp *interp; /* Current interpreter. */
|
219 |
|
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int argc; /* Number of arguments. */
|
220 |
|
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char **argv; /* Argument strings. */
|
221 |
|
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{
|
222 |
|
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register Message *msgPtr;
|
223 |
|
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Tk_Window new;
|
224 |
|
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Tk_Window tkwin = (Tk_Window) clientData;
|
225 |
|
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|
226 |
|
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if (argc < 2) {
|
227 |
|
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Tcl_AppendResult(interp, "wrong # args: should be \"",
|
228 |
|
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argv[0], " pathName ?options?\"", (char *) NULL);
|
229 |
|
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return TCL_ERROR;
|
230 |
|
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}
|
231 |
|
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|
232 |
|
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new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
|
233 |
|
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if (new == NULL) {
|
234 |
|
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return TCL_ERROR;
|
235 |
|
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}
|
236 |
|
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|
237 |
|
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msgPtr = (Message *) ckalloc(sizeof(Message));
|
238 |
|
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msgPtr->tkwin = new;
|
239 |
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msgPtr->display = Tk_Display(new);
|
240 |
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msgPtr->interp = interp;
|
241 |
|
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msgPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(msgPtr->tkwin),
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242 |
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MessageWidgetCmd, (ClientData) msgPtr, MessageCmdDeletedProc);
|
243 |
|
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msgPtr->textLayout = NULL;
|
244 |
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msgPtr->string = NULL;
|
245 |
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msgPtr->numChars = 0;
|
246 |
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msgPtr->textVarName = NULL;
|
247 |
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msgPtr->border = NULL;
|
248 |
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msgPtr->borderWidth = 0;
|
249 |
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msgPtr->relief = TK_RELIEF_FLAT;
|
250 |
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msgPtr->highlightWidth = 0;
|
251 |
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msgPtr->highlightBgColorPtr = NULL;
|
252 |
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msgPtr->highlightColorPtr = NULL;
|
253 |
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msgPtr->tkfont = NULL;
|
254 |
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msgPtr->fgColorPtr = NULL;
|
255 |
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msgPtr->textGC = None;
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256 |
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msgPtr->padX = 0;
|
257 |
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msgPtr->padY = 0;
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258 |
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msgPtr->anchor = TK_ANCHOR_CENTER;
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259 |
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msgPtr->width = 0;
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260 |
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msgPtr->aspect = 150;
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261 |
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msgPtr->msgWidth = 0;
|
262 |
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msgPtr->msgHeight = 0;
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263 |
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msgPtr->justify = TK_JUSTIFY_LEFT;
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264 |
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msgPtr->cursor = None;
|
265 |
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msgPtr->takeFocus = NULL;
|
266 |
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msgPtr->flags = 0;
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267 |
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268 |
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Tk_SetClass(msgPtr->tkwin, "Message");
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269 |
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TkSetClassProcs(msgPtr->tkwin, &messageClass, (ClientData) msgPtr);
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270 |
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Tk_CreateEventHandler(msgPtr->tkwin,
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271 |
|
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ExposureMask|StructureNotifyMask|FocusChangeMask,
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272 |
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MessageEventProc, (ClientData) msgPtr);
|
273 |
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if (ConfigureMessage(interp, msgPtr, argc-2, argv+2, 0) != TCL_OK) {
|
274 |
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goto error;
|
275 |
|
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}
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276 |
|
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|
277 |
|
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interp->result = Tk_PathName(msgPtr->tkwin);
|
278 |
|
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return TCL_OK;
|
279 |
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|
280 |
|
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error:
|
281 |
|
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Tk_DestroyWindow(msgPtr->tkwin);
|
282 |
|
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return TCL_ERROR;
|
283 |
|
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}
|
284 |
|
|
|
285 |
|
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/*
|
286 |
|
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*--------------------------------------------------------------
|
287 |
|
|
*
|
288 |
|
|
* MessageWidgetCmd --
|
289 |
|
|
*
|
290 |
|
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* This procedure is invoked to process the Tcl command
|
291 |
|
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* that corresponds to a widget managed by this module.
|
292 |
|
|
* See the user documentation for details on what it does.
|
293 |
|
|
*
|
294 |
|
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* Results:
|
295 |
|
|
* A standard Tcl result.
|
296 |
|
|
*
|
297 |
|
|
* Side effects:
|
298 |
|
|
* See the user documentation.
|
299 |
|
|
*
|
300 |
|
|
*--------------------------------------------------------------
|
301 |
|
|
*/
|
302 |
|
|
|
303 |
|
|
static int
|
304 |
|
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MessageWidgetCmd(clientData, interp, argc, argv)
|
305 |
|
|
ClientData clientData; /* Information about message widget. */
|
306 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
307 |
|
|
int argc; /* Number of arguments. */
|
308 |
|
|
char **argv; /* Argument strings. */
|
309 |
|
|
{
|
310 |
|
|
register Message *msgPtr = (Message *) clientData;
|
311 |
|
|
size_t length;
|
312 |
|
|
int c;
|
313 |
|
|
|
314 |
|
|
if (argc < 2) {
|
315 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
316 |
|
|
" option ?arg arg ...?\"", (char *) NULL);
|
317 |
|
|
return TCL_ERROR;
|
318 |
|
|
}
|
319 |
|
|
c = argv[1][0];
|
320 |
|
|
length = strlen(argv[1]);
|
321 |
|
|
if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
|
322 |
|
|
&& (length >= 2)) {
|
323 |
|
|
if (argc != 3) {
|
324 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
325 |
|
|
argv[0], " cget option\"",
|
326 |
|
|
(char *) NULL);
|
327 |
|
|
return TCL_ERROR;
|
328 |
|
|
}
|
329 |
|
|
return Tk_ConfigureValue(interp, msgPtr->tkwin, configSpecs,
|
330 |
|
|
(char *) msgPtr, argv[2], 0);
|
331 |
|
|
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
|
332 |
|
|
&& (length >= 2)) {
|
333 |
|
|
if (argc == 2) {
|
334 |
|
|
return Tk_ConfigureInfo(interp, msgPtr->tkwin, configSpecs,
|
335 |
|
|
(char *) msgPtr, (char *) NULL, 0);
|
336 |
|
|
} else if (argc == 3) {
|
337 |
|
|
return Tk_ConfigureInfo(interp, msgPtr->tkwin, configSpecs,
|
338 |
|
|
(char *) msgPtr, argv[2], 0);
|
339 |
|
|
} else {
|
340 |
|
|
return ConfigureMessage(interp, msgPtr, argc-2, argv+2,
|
341 |
|
|
TK_CONFIG_ARGV_ONLY);
|
342 |
|
|
}
|
343 |
|
|
} else {
|
344 |
|
|
Tcl_AppendResult(interp, "bad option \"", argv[1],
|
345 |
|
|
"\": must be cget or configure", (char *) NULL);
|
346 |
|
|
return TCL_ERROR;
|
347 |
|
|
}
|
348 |
|
|
}
|
349 |
|
|
|
350 |
|
|
/*
|
351 |
|
|
*----------------------------------------------------------------------
|
352 |
|
|
*
|
353 |
|
|
* DestroyMessage --
|
354 |
|
|
*
|
355 |
|
|
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
|
356 |
|
|
* to clean up the internal structure of a message at a safe time
|
357 |
|
|
* (when no-one is using it anymore).
|
358 |
|
|
*
|
359 |
|
|
* Results:
|
360 |
|
|
* None.
|
361 |
|
|
*
|
362 |
|
|
* Side effects:
|
363 |
|
|
* Everything associated with the message is freed up.
|
364 |
|
|
*
|
365 |
|
|
*----------------------------------------------------------------------
|
366 |
|
|
*/
|
367 |
|
|
|
368 |
|
|
static void
|
369 |
|
|
DestroyMessage(memPtr)
|
370 |
|
|
char *memPtr; /* Info about message widget. */
|
371 |
|
|
{
|
372 |
|
|
register Message *msgPtr = (Message *) memPtr;
|
373 |
|
|
|
374 |
|
|
/*
|
375 |
|
|
* Free up all the stuff that requires special handling, then
|
376 |
|
|
* let Tk_FreeOptions handle all the standard option-related
|
377 |
|
|
* stuff.
|
378 |
|
|
*/
|
379 |
|
|
|
380 |
|
|
Tk_FreeTextLayout(msgPtr->textLayout);
|
381 |
|
|
if (msgPtr->textVarName != NULL) {
|
382 |
|
|
Tcl_UntraceVar(msgPtr->interp, msgPtr->textVarName,
|
383 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
384 |
|
|
MessageTextVarProc, (ClientData) msgPtr);
|
385 |
|
|
}
|
386 |
|
|
if (msgPtr->textGC != None) {
|
387 |
|
|
Tk_FreeGC(msgPtr->display, msgPtr->textGC);
|
388 |
|
|
}
|
389 |
|
|
Tk_FreeOptions(configSpecs, (char *) msgPtr, msgPtr->display, 0);
|
390 |
|
|
ckfree((char *) msgPtr);
|
391 |
|
|
}
|
392 |
|
|
|
393 |
|
|
/*
|
394 |
|
|
*----------------------------------------------------------------------
|
395 |
|
|
*
|
396 |
|
|
* ConfigureMessage --
|
397 |
|
|
*
|
398 |
|
|
* This procedure is called to process an argv/argc list, plus
|
399 |
|
|
* the Tk option database, in order to configure (or
|
400 |
|
|
* reconfigure) a message widget.
|
401 |
|
|
*
|
402 |
|
|
* Results:
|
403 |
|
|
* The return value is a standard Tcl result. If TCL_ERROR is
|
404 |
|
|
* returned, then interp->result contains an error message.
|
405 |
|
|
*
|
406 |
|
|
* Side effects:
|
407 |
|
|
* Configuration information, such as text string, colors, font,
|
408 |
|
|
* etc. get set for msgPtr; old resources get freed, if there
|
409 |
|
|
* were any.
|
410 |
|
|
*
|
411 |
|
|
*----------------------------------------------------------------------
|
412 |
|
|
*/
|
413 |
|
|
|
414 |
|
|
static int
|
415 |
|
|
ConfigureMessage(interp, msgPtr, argc, argv, flags)
|
416 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
417 |
|
|
register Message *msgPtr; /* Information about widget; may or may
|
418 |
|
|
* not already have values for some fields. */
|
419 |
|
|
int argc; /* Number of valid entries in argv. */
|
420 |
|
|
char **argv; /* Arguments. */
|
421 |
|
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */
|
422 |
|
|
{
|
423 |
|
|
/*
|
424 |
|
|
* Eliminate any existing trace on a variable monitored by the message.
|
425 |
|
|
*/
|
426 |
|
|
|
427 |
|
|
if (msgPtr->textVarName != NULL) {
|
428 |
|
|
Tcl_UntraceVar(interp, msgPtr->textVarName,
|
429 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
430 |
|
|
MessageTextVarProc, (ClientData) msgPtr);
|
431 |
|
|
}
|
432 |
|
|
|
433 |
|
|
if (Tk_ConfigureWidget(interp, msgPtr->tkwin, configSpecs,
|
434 |
|
|
argc, argv, (char *) msgPtr, flags) != TCL_OK) {
|
435 |
|
|
return TCL_ERROR;
|
436 |
|
|
}
|
437 |
|
|
|
438 |
|
|
/*
|
439 |
|
|
* If the message is to display the value of a variable, then set up
|
440 |
|
|
* a trace on the variable's value, create the variable if it doesn't
|
441 |
|
|
* exist, and fetch its current value.
|
442 |
|
|
*/
|
443 |
|
|
|
444 |
|
|
if (msgPtr->textVarName != NULL) {
|
445 |
|
|
char *value;
|
446 |
|
|
|
447 |
|
|
value = Tcl_GetVar(interp, msgPtr->textVarName, TCL_GLOBAL_ONLY);
|
448 |
|
|
if (value == NULL) {
|
449 |
|
|
Tcl_SetVar(interp, msgPtr->textVarName, msgPtr->string,
|
450 |
|
|
TCL_GLOBAL_ONLY);
|
451 |
|
|
} else {
|
452 |
|
|
if (msgPtr->string != NULL) {
|
453 |
|
|
ckfree(msgPtr->string);
|
454 |
|
|
}
|
455 |
|
|
msgPtr->string = strcpy(ckalloc(strlen(value) + 1), value);
|
456 |
|
|
}
|
457 |
|
|
Tcl_TraceVar(interp, msgPtr->textVarName,
|
458 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
459 |
|
|
MessageTextVarProc, (ClientData) msgPtr);
|
460 |
|
|
}
|
461 |
|
|
|
462 |
|
|
/*
|
463 |
|
|
* A few other options need special processing, such as setting
|
464 |
|
|
* the background from a 3-D border or handling special defaults
|
465 |
|
|
* that couldn't be specified to Tk_ConfigureWidget.
|
466 |
|
|
*/
|
467 |
|
|
|
468 |
|
|
msgPtr->numChars = strlen(msgPtr->string);
|
469 |
|
|
|
470 |
|
|
Tk_SetBackgroundFromBorder(msgPtr->tkwin, msgPtr->border);
|
471 |
|
|
|
472 |
|
|
if (msgPtr->highlightWidth < 0) {
|
473 |
|
|
msgPtr->highlightWidth = 0;
|
474 |
|
|
}
|
475 |
|
|
|
476 |
|
|
MessageWorldChanged((ClientData) msgPtr);
|
477 |
|
|
return TCL_OK;
|
478 |
|
|
}
|
479 |
|
|
|
480 |
|
|
/*
|
481 |
|
|
*---------------------------------------------------------------------------
|
482 |
|
|
*
|
483 |
|
|
* MessageWorldChanged --
|
484 |
|
|
*
|
485 |
|
|
* This procedure is called when the world has changed in some
|
486 |
|
|
* way and the widget needs to recompute all its graphics contexts
|
487 |
|
|
* and determine its new geometry.
|
488 |
|
|
*
|
489 |
|
|
* Results:
|
490 |
|
|
* None.
|
491 |
|
|
*
|
492 |
|
|
* Side effects:
|
493 |
|
|
* Message will be relayed out and redisplayed.
|
494 |
|
|
*
|
495 |
|
|
*---------------------------------------------------------------------------
|
496 |
|
|
*/
|
497 |
|
|
|
498 |
|
|
static void
|
499 |
|
|
MessageWorldChanged(instanceData)
|
500 |
|
|
ClientData instanceData; /* Information about widget. */
|
501 |
|
|
{
|
502 |
|
|
XGCValues gcValues;
|
503 |
|
|
GC gc;
|
504 |
|
|
Tk_FontMetrics fm;
|
505 |
|
|
Message *msgPtr;
|
506 |
|
|
|
507 |
|
|
msgPtr = (Message *) instanceData;
|
508 |
|
|
|
509 |
|
|
gcValues.font = Tk_FontId(msgPtr->tkfont);
|
510 |
|
|
gcValues.foreground = msgPtr->fgColorPtr->pixel;
|
511 |
|
|
gc = Tk_GetGCColor(msgPtr->tkwin, GCForeground | GCFont, &gcValues,
|
512 |
|
|
msgPtr->fgColorPtr, NULL);
|
513 |
|
|
if (msgPtr->textGC != None) {
|
514 |
|
|
Tk_FreeGC(msgPtr->display, msgPtr->textGC);
|
515 |
|
|
}
|
516 |
|
|
msgPtr->textGC = gc;
|
517 |
|
|
|
518 |
|
|
Tk_GetFontMetrics(msgPtr->tkfont, &fm);
|
519 |
|
|
if (msgPtr->padX < 0) {
|
520 |
|
|
msgPtr->padX = fm.ascent / 2;
|
521 |
|
|
}
|
522 |
|
|
if (msgPtr->padY == -1) {
|
523 |
|
|
msgPtr->padY = fm.ascent / 4;
|
524 |
|
|
}
|
525 |
|
|
|
526 |
|
|
/*
|
527 |
|
|
* Recompute the desired geometry for the window, and arrange for
|
528 |
|
|
* the window to be redisplayed.
|
529 |
|
|
*/
|
530 |
|
|
|
531 |
|
|
ComputeMessageGeometry(msgPtr);
|
532 |
|
|
if ((msgPtr->tkwin != NULL) && Tk_IsMapped(msgPtr->tkwin)
|
533 |
|
|
&& !(msgPtr->flags & REDRAW_PENDING)) {
|
534 |
|
|
Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
|
535 |
|
|
msgPtr->flags |= REDRAW_PENDING;
|
536 |
|
|
}
|
537 |
|
|
}
|
538 |
|
|
|
539 |
|
|
/*
|
540 |
|
|
*--------------------------------------------------------------
|
541 |
|
|
*
|
542 |
|
|
* ComputeMessageGeometry --
|
543 |
|
|
*
|
544 |
|
|
* Compute the desired geometry for a message window,
|
545 |
|
|
* taking into account the desired aspect ratio for the
|
546 |
|
|
* window.
|
547 |
|
|
*
|
548 |
|
|
* Results:
|
549 |
|
|
* None.
|
550 |
|
|
*
|
551 |
|
|
* Side effects:
|
552 |
|
|
* Tk_GeometryRequest is called to inform the geometry
|
553 |
|
|
* manager of the desired geometry for this window.
|
554 |
|
|
*
|
555 |
|
|
*--------------------------------------------------------------
|
556 |
|
|
*/
|
557 |
|
|
|
558 |
|
|
static void
|
559 |
|
|
ComputeMessageGeometry(msgPtr)
|
560 |
|
|
register Message *msgPtr; /* Information about window. */
|
561 |
|
|
{
|
562 |
|
|
int width, inc, height;
|
563 |
|
|
int thisWidth, thisHeight, maxWidth;
|
564 |
|
|
int aspect, lowerBound, upperBound, inset;
|
565 |
|
|
|
566 |
|
|
Tk_FreeTextLayout(msgPtr->textLayout);
|
567 |
|
|
|
568 |
|
|
inset = msgPtr->borderWidth + msgPtr->highlightWidth;
|
569 |
|
|
|
570 |
|
|
/*
|
571 |
|
|
* Compute acceptable bounds for the final aspect ratio.
|
572 |
|
|
*/
|
573 |
|
|
|
574 |
|
|
aspect = msgPtr->aspect/10;
|
575 |
|
|
if (aspect < 5) {
|
576 |
|
|
aspect = 5;
|
577 |
|
|
}
|
578 |
|
|
lowerBound = msgPtr->aspect - aspect;
|
579 |
|
|
upperBound = msgPtr->aspect + aspect;
|
580 |
|
|
|
581 |
|
|
/*
|
582 |
|
|
* Do the computation in multiple passes: start off with
|
583 |
|
|
* a very wide window, and compute its height. Then change
|
584 |
|
|
* the width and try again. Reduce the size of the change
|
585 |
|
|
* and iterate until dimensions are found that approximate
|
586 |
|
|
* the desired aspect ratio. Or, if the user gave an explicit
|
587 |
|
|
* width then just use that.
|
588 |
|
|
*/
|
589 |
|
|
|
590 |
|
|
if (msgPtr->width > 0) {
|
591 |
|
|
width = msgPtr->width;
|
592 |
|
|
inc = 0;
|
593 |
|
|
} else {
|
594 |
|
|
width = WidthOfScreen(Tk_Screen(msgPtr->tkwin))/2;
|
595 |
|
|
inc = width/2;
|
596 |
|
|
}
|
597 |
|
|
|
598 |
|
|
for ( ; ; inc /= 2) {
|
599 |
|
|
msgPtr->textLayout = Tk_ComputeTextLayout(msgPtr->tkfont,
|
600 |
|
|
msgPtr->string, msgPtr->numChars, width, msgPtr->justify,
|
601 |
|
|
0, &thisWidth, &thisHeight);
|
602 |
|
|
maxWidth = thisWidth + 2 * (inset + msgPtr->padX);
|
603 |
|
|
height = thisHeight + 2 * (inset + msgPtr->padY);
|
604 |
|
|
|
605 |
|
|
if (inc <= 2) {
|
606 |
|
|
break;
|
607 |
|
|
}
|
608 |
|
|
aspect = (100 * maxWidth) / height;
|
609 |
|
|
|
610 |
|
|
if (aspect < lowerBound) {
|
611 |
|
|
width += inc;
|
612 |
|
|
} else if (aspect > upperBound) {
|
613 |
|
|
width -= inc;
|
614 |
|
|
} else {
|
615 |
|
|
break;
|
616 |
|
|
}
|
617 |
|
|
Tk_FreeTextLayout(msgPtr->textLayout);
|
618 |
|
|
}
|
619 |
|
|
msgPtr->msgWidth = thisWidth;
|
620 |
|
|
msgPtr->msgHeight = thisHeight;
|
621 |
|
|
Tk_GeometryRequest(msgPtr->tkwin, maxWidth, height);
|
622 |
|
|
Tk_SetInternalBorder(msgPtr->tkwin, inset);
|
623 |
|
|
}
|
624 |
|
|
|
625 |
|
|
/*
|
626 |
|
|
*--------------------------------------------------------------
|
627 |
|
|
*
|
628 |
|
|
* DisplayMessage --
|
629 |
|
|
*
|
630 |
|
|
* This procedure redraws the contents of a message window.
|
631 |
|
|
*
|
632 |
|
|
* Results:
|
633 |
|
|
* None.
|
634 |
|
|
*
|
635 |
|
|
* Side effects:
|
636 |
|
|
* Information appears on the screen.
|
637 |
|
|
*
|
638 |
|
|
*--------------------------------------------------------------
|
639 |
|
|
*/
|
640 |
|
|
|
641 |
|
|
static void
|
642 |
|
|
DisplayMessage(clientData)
|
643 |
|
|
ClientData clientData; /* Information about window. */
|
644 |
|
|
{
|
645 |
|
|
register Message *msgPtr = (Message *) clientData;
|
646 |
|
|
register Tk_Window tkwin = msgPtr->tkwin;
|
647 |
|
|
int x, y;
|
648 |
|
|
|
649 |
|
|
msgPtr->flags &= ~REDRAW_PENDING;
|
650 |
|
|
if ((msgPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
|
651 |
|
|
return;
|
652 |
|
|
}
|
653 |
|
|
Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin), msgPtr->border, 0, 0,
|
654 |
|
|
Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
|
655 |
|
|
|
656 |
|
|
/*
|
657 |
|
|
* Compute starting y-location for message based on message size
|
658 |
|
|
* and anchor option.
|
659 |
|
|
*/
|
660 |
|
|
|
661 |
|
|
TkComputeAnchor(msgPtr->anchor, tkwin, msgPtr->padX, msgPtr->padY,
|
662 |
|
|
msgPtr->msgWidth, msgPtr->msgHeight, &x, &y);
|
663 |
|
|
Tk_DrawTextLayout(Tk_Display(tkwin), Tk_WindowId(tkwin), msgPtr->textGC,
|
664 |
|
|
msgPtr->textLayout, x, y, 0, -1);
|
665 |
|
|
|
666 |
|
|
if (msgPtr->relief != TK_RELIEF_FLAT) {
|
667 |
|
|
Tk_Draw3DRectangle(tkwin, Tk_WindowId(tkwin), msgPtr->border,
|
668 |
|
|
msgPtr->highlightWidth, msgPtr->highlightWidth,
|
669 |
|
|
Tk_Width(tkwin) - 2*msgPtr->highlightWidth,
|
670 |
|
|
Tk_Height(tkwin) - 2*msgPtr->highlightWidth,
|
671 |
|
|
msgPtr->borderWidth, msgPtr->relief);
|
672 |
|
|
}
|
673 |
|
|
if (msgPtr->highlightWidth != 0) {
|
674 |
|
|
GC gc;
|
675 |
|
|
|
676 |
|
|
if (msgPtr->flags & GOT_FOCUS) {
|
677 |
|
|
gc = Tk_GCForColor(msgPtr->highlightColorPtr, Tk_WindowId(tkwin));
|
678 |
|
|
} else {
|
679 |
|
|
gc = Tk_GCForColor(msgPtr->highlightBgColorPtr, Tk_WindowId(tkwin));
|
680 |
|
|
}
|
681 |
|
|
Tk_DrawFocusHighlight(tkwin, gc, msgPtr->highlightWidth,
|
682 |
|
|
Tk_WindowId(tkwin));
|
683 |
|
|
}
|
684 |
|
|
}
|
685 |
|
|
|
686 |
|
|
/*
|
687 |
|
|
*--------------------------------------------------------------
|
688 |
|
|
*
|
689 |
|
|
* MessageEventProc --
|
690 |
|
|
*
|
691 |
|
|
* This procedure is invoked by the Tk dispatcher for various
|
692 |
|
|
* events on messages.
|
693 |
|
|
*
|
694 |
|
|
* Results:
|
695 |
|
|
* None.
|
696 |
|
|
*
|
697 |
|
|
* Side effects:
|
698 |
|
|
* When the window gets deleted, internal structures get
|
699 |
|
|
* cleaned up. When it gets exposed, it is redisplayed.
|
700 |
|
|
*
|
701 |
|
|
*--------------------------------------------------------------
|
702 |
|
|
*/
|
703 |
|
|
|
704 |
|
|
static void
|
705 |
|
|
MessageEventProc(clientData, eventPtr)
|
706 |
|
|
ClientData clientData; /* Information about window. */
|
707 |
|
|
XEvent *eventPtr; /* Information about event. */
|
708 |
|
|
{
|
709 |
|
|
Message *msgPtr = (Message *) clientData;
|
710 |
|
|
|
711 |
|
|
if (((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0))
|
712 |
|
|
|| (eventPtr->type == ConfigureNotify)) {
|
713 |
|
|
goto redraw;
|
714 |
|
|
} else if (eventPtr->type == DestroyNotify) {
|
715 |
|
|
if (msgPtr->tkwin != NULL) {
|
716 |
|
|
msgPtr->tkwin = NULL;
|
717 |
|
|
Tcl_DeleteCommandFromToken(msgPtr->interp, msgPtr->widgetCmd);
|
718 |
|
|
}
|
719 |
|
|
if (msgPtr->flags & REDRAW_PENDING) {
|
720 |
|
|
Tcl_CancelIdleCall(DisplayMessage, (ClientData) msgPtr);
|
721 |
|
|
}
|
722 |
|
|
Tcl_EventuallyFree((ClientData) msgPtr, DestroyMessage);
|
723 |
|
|
} else if (eventPtr->type == FocusIn) {
|
724 |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) {
|
725 |
|
|
msgPtr->flags |= GOT_FOCUS;
|
726 |
|
|
if (msgPtr->highlightWidth > 0) {
|
727 |
|
|
goto redraw;
|
728 |
|
|
}
|
729 |
|
|
}
|
730 |
|
|
} else if (eventPtr->type == FocusOut) {
|
731 |
|
|
if (eventPtr->xfocus.detail != NotifyInferior) {
|
732 |
|
|
msgPtr->flags &= ~GOT_FOCUS;
|
733 |
|
|
if (msgPtr->highlightWidth > 0) {
|
734 |
|
|
goto redraw;
|
735 |
|
|
}
|
736 |
|
|
}
|
737 |
|
|
}
|
738 |
|
|
return;
|
739 |
|
|
|
740 |
|
|
redraw:
|
741 |
|
|
if ((msgPtr->tkwin != NULL) && !(msgPtr->flags & REDRAW_PENDING)) {
|
742 |
|
|
Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
|
743 |
|
|
msgPtr->flags |= REDRAW_PENDING;
|
744 |
|
|
}
|
745 |
|
|
}
|
746 |
|
|
|
747 |
|
|
/*
|
748 |
|
|
*----------------------------------------------------------------------
|
749 |
|
|
*
|
750 |
|
|
* MessageCmdDeletedProc --
|
751 |
|
|
*
|
752 |
|
|
* This procedure is invoked when a widget command is deleted. If
|
753 |
|
|
* the widget isn't already in the process of being destroyed,
|
754 |
|
|
* this command destroys it.
|
755 |
|
|
*
|
756 |
|
|
* Results:
|
757 |
|
|
* None.
|
758 |
|
|
*
|
759 |
|
|
* Side effects:
|
760 |
|
|
* The widget is destroyed.
|
761 |
|
|
*
|
762 |
|
|
*----------------------------------------------------------------------
|
763 |
|
|
*/
|
764 |
|
|
|
765 |
|
|
static void
|
766 |
|
|
MessageCmdDeletedProc(clientData)
|
767 |
|
|
ClientData clientData; /* Pointer to widget record for widget. */
|
768 |
|
|
{
|
769 |
|
|
Message *msgPtr = (Message *) clientData;
|
770 |
|
|
Tk_Window tkwin = msgPtr->tkwin;
|
771 |
|
|
|
772 |
|
|
/*
|
773 |
|
|
* This procedure could be invoked either because the window was
|
774 |
|
|
* destroyed and the command was then deleted (in which case tkwin
|
775 |
|
|
* is NULL) or because the command was deleted, and then this procedure
|
776 |
|
|
* destroys the widget.
|
777 |
|
|
*/
|
778 |
|
|
|
779 |
|
|
if (tkwin != NULL) {
|
780 |
|
|
msgPtr->tkwin = NULL;
|
781 |
|
|
Tk_DestroyWindow(tkwin);
|
782 |
|
|
}
|
783 |
|
|
}
|
784 |
|
|
|
785 |
|
|
/*
|
786 |
|
|
*--------------------------------------------------------------
|
787 |
|
|
*
|
788 |
|
|
* MessageTextVarProc --
|
789 |
|
|
*
|
790 |
|
|
* This procedure is invoked when someone changes the variable
|
791 |
|
|
* whose contents are to be displayed in a message.
|
792 |
|
|
*
|
793 |
|
|
* Results:
|
794 |
|
|
* NULL is always returned.
|
795 |
|
|
*
|
796 |
|
|
* Side effects:
|
797 |
|
|
* The text displayed in the message will change to match the
|
798 |
|
|
* variable.
|
799 |
|
|
*
|
800 |
|
|
*--------------------------------------------------------------
|
801 |
|
|
*/
|
802 |
|
|
|
803 |
|
|
/* ARGSUSED */
|
804 |
|
|
static char *
|
805 |
|
|
MessageTextVarProc(clientData, interp, name1, name2, flags)
|
806 |
|
|
ClientData clientData; /* Information about message. */
|
807 |
|
|
Tcl_Interp *interp; /* Interpreter containing variable. */
|
808 |
|
|
char *name1; /* Name of variable. */
|
809 |
|
|
char *name2; /* Second part of variable name. */
|
810 |
|
|
int flags; /* Information about what happened. */
|
811 |
|
|
{
|
812 |
|
|
register Message *msgPtr = (Message *) clientData;
|
813 |
|
|
char *value;
|
814 |
|
|
|
815 |
|
|
/*
|
816 |
|
|
* If the variable is unset, then immediately recreate it unless
|
817 |
|
|
* the whole interpreter is going away.
|
818 |
|
|
*/
|
819 |
|
|
|
820 |
|
|
if (flags & TCL_TRACE_UNSETS) {
|
821 |
|
|
if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
|
822 |
|
|
Tcl_SetVar(interp, msgPtr->textVarName, msgPtr->string,
|
823 |
|
|
TCL_GLOBAL_ONLY);
|
824 |
|
|
Tcl_TraceVar(interp, msgPtr->textVarName,
|
825 |
|
|
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
826 |
|
|
MessageTextVarProc, clientData);
|
827 |
|
|
}
|
828 |
|
|
return (char *) NULL;
|
829 |
|
|
}
|
830 |
|
|
|
831 |
|
|
value = Tcl_GetVar(interp, msgPtr->textVarName, TCL_GLOBAL_ONLY);
|
832 |
|
|
if (value == NULL) {
|
833 |
|
|
value = "";
|
834 |
|
|
}
|
835 |
|
|
if (msgPtr->string != NULL) {
|
836 |
|
|
ckfree(msgPtr->string);
|
837 |
|
|
}
|
838 |
|
|
msgPtr->numChars = strlen(value);
|
839 |
|
|
msgPtr->string = (char *) ckalloc((unsigned) (msgPtr->numChars + 1));
|
840 |
|
|
strcpy(msgPtr->string, value);
|
841 |
|
|
ComputeMessageGeometry(msgPtr);
|
842 |
|
|
|
843 |
|
|
if ((msgPtr->tkwin != NULL) && Tk_IsMapped(msgPtr->tkwin)
|
844 |
|
|
&& !(msgPtr->flags & REDRAW_PENDING)) {
|
845 |
|
|
Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
|
846 |
|
|
msgPtr->flags |= REDRAW_PENDING;
|
847 |
|
|
}
|
848 |
|
|
return (char *) NULL;
|
849 |
|
|
}
|