1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
Copyright (C) 1996-2001 Ulric Eriksson <ulric@siag.nu>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the Licence, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/xpm.h>
#include "MwCanvasP.h"
#define DEFAULT_HEIGHT 50
#define DEFAULT_WIDTH 50
#define offset(field) XtOffsetOf(MwCanvasRec, canvas.field)
static XtResource resources[] = {
{
XtNcallback,
XtCCallback,
XtRCallback,
sizeof(XtPointer),
offset(callbacks),
XtRCallback,
(XtPointer)NULL
}
};
#undef offset
/* methods */
static void Redisplay(Widget, XEvent *, Region);
static Boolean SetValues(Widget, Widget, Widget, ArgList, Cardinal *);
static void Initialize(Widget, Widget, ArgList, Cardinal *);
/* actions */
static void MwCanvasAction(Widget, XEvent *, String *, Cardinal *);
static XtActionsRec actions[] =
{
{"canvas", MwCanvasAction},
};
/* translations */
static char translations[] =
"<Key>: canvas()\n";
#define SuperClass ((CoreWidgetClass)&coreClassRec)
MwCanvasClassRec mwCanvasClassRec = {
{ /* core fields */
/* superclass */ (WidgetClass) SuperClass,
/* class_name */ "MwCanvas",
/* widget_size */ sizeof(MwCanvasRec),
/* class_initialize */ NULL,
/* class_part_initialize */ NULL,
/* class_inited */ FALSE,
/* initialize */ Initialize,
/* initialize_hook */ NULL,
/* realize */ XtInheritRealize,
/* actions */ actions,
/* num_actions */ XtNumber(actions),
/* resources */ resources,
/* num_resources */ XtNumber(resources),
/* xrm_class */ NULLQUARK,
/* compress_motion */ TRUE,
/* compress_exposure */ TRUE,
/* compress_enterleave */ TRUE,
/* visible_interest */ FALSE,
/* destroy */ NULL,
/* resize */ NULL,
/* 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 */ translations,
/* query_geometry */ XtInheritQueryGeometry,
/* display_accelerator */ XtInheritDisplayAccelerator,
/* extension */ NULL
},
{ /* canvas fields */
/* empty */ 0
}
};
WidgetClass mwCanvasWidgetClass = (WidgetClass)&mwCanvasClassRec;
/* supporting code copied directly from canvas.c */
static void MwCanvasAction(Widget w, XEvent *event, String *params, Cardinal *n)
{
;
}
static void Initialize(Widget req, Widget new, ArgList args, Cardinal *nargs)
{
MwCanvasWidget cw = (MwCanvasWidget)new;
if (cw->core.height == 0) cw->core.height = DEFAULT_HEIGHT;
if (cw->core.width == 0) cw->core.width = DEFAULT_WIDTH;
/*
widgetClassRec.core_class.resize((Widget)cw);
(*XtClass(new)->core_class.resize)((Widget)cw);
*/
}
static void Redisplay(Widget w, XEvent *event, Region r)
{
MwCanvasWidget aw = (MwCanvasWidget) w;
XtCallCallbackList(w, aw->canvas.callbacks, NULL);
}
static Boolean SetValues(Widget current, Widget request, Widget new,
ArgList args, Cardinal *nargs)
{
Boolean do_redisplay = True;
return do_redisplay;
}
|
