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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* tkUnixDraw.c --
*
* This file contains X specific drawing routines.
*
* Copyright (c) 1995 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tkPort.h"
#include "tkInt.h"
#if !defined(__WIN32__) && !defined(MAC_TCL)
#include "tkUnixInt.h"
#endif
/*
* The following structure is used to pass information to
* ScrollRestrictProc from TkScrollWindow.
*/
typedef struct ScrollInfo {
int done; /* Flag is 0 until filtering is done. */
Display *display; /* Display to filter. */
Window window; /* Window to filter. */
TkRegion region; /* Region into which damage is accumulated. */
int dx, dy; /* Amount by which window was shifted. */
} ScrollInfo;
/*
* Forward declarations for procedures declared later in this file:
*/
static Tk_RestrictAction ScrollRestrictProc _ANSI_ARGS_((
ClientData arg, XEvent *eventPtr));
/*
*----------------------------------------------------------------------
*
* TkScrollWindow --
*
* Scroll a rectangle of the specified window and accumulate
* damage information in the specified Region.
*
* Results:
* Returns 0 if no damage additional damage was generated. Sets
* damageRgn to contain the damaged areas and returns 1 if
* GraphicsExpose events were detected.
*
* Side effects:
* Scrolls the bits in the window and enters the event loop
* looking for damage events.
*
*----------------------------------------------------------------------
*/
int
TkScrollWindow(tkwin, gc, x, y, width, height, dx, dy, damageRgn)
Tk_Window tkwin; /* The window to be scrolled. */
GC gc; /* GC for window to be scrolled. */
int x, y, width, height; /* Position rectangle to be scrolled. */
int dx, dy; /* Distance rectangle should be moved. */
TkRegion damageRgn; /* Region to accumulate damage in. */
{
Tk_RestrictProc *oldProc;
ClientData oldArg, dummy;
ScrollInfo info;
XCopyArea(Tk_Display(tkwin), Tk_WindowId(tkwin), Tk_WindowId(tkwin), gc,
x, y, (unsigned int) width, (unsigned int) height, x + dx, y + dy);
info.done = 0;
info.window = Tk_WindowId(tkwin);
info.display = Tk_Display(tkwin);
info.region = damageRgn;
info.dx = dx;
info.dy = dy;
/*
* Sync the event stream so all of the expose events will be on the
* Tk event queue before we start filtering. This avoids busy waiting
* while we filter events.
*/
TkpSync(info.display);
oldProc = Tk_RestrictEvents(ScrollRestrictProc, (ClientData) &info,
&oldArg);
while (!info.done) {
Tcl_ServiceEvent(TCL_WINDOW_EVENTS);
}
Tk_RestrictEvents(oldProc, oldArg, &dummy);
if (XEmptyRegion((Region) damageRgn)) {
return 0;
} else {
return 1;
}
}
/*
*----------------------------------------------------------------------
*
* ScrollRestrictProc --
*
* A Tk_RestrictProc used by TkScrollWindow to gather up Expose
* information into a single damage region. It accumulates damage
* events on the specified window until a NoExpose or the last
* GraphicsExpose event is detected.
*
* Results:
* None.
*
* Side effects:
* Discards Expose events after accumulating damage information
* for a particular window.
*
*----------------------------------------------------------------------
*/
static Tk_RestrictAction
ScrollRestrictProc(arg, eventPtr)
ClientData arg;
XEvent *eventPtr;
{
ScrollInfo *info = (ScrollInfo *) arg;
XRectangle rect;
/*
* Defer events which aren't for the specified window.
*/
if (info->done || (eventPtr->xany.display != info->display)
|| (eventPtr->xany.window != info->window)) {
return TK_DEFER_EVENT;
}
if (eventPtr->type == NoExpose) {
info->done = 1;
} else if (eventPtr->type == GraphicsExpose) {
rect.x = eventPtr->xgraphicsexpose.x;
rect.y = eventPtr->xgraphicsexpose.y;
rect.width = eventPtr->xgraphicsexpose.width;
rect.height = eventPtr->xgraphicsexpose.height;
XUnionRectWithRegion(&rect, (Region) info->region,
(Region) info->region);
if (eventPtr->xgraphicsexpose.count == 0) {
info->done = 1;
}
} else if (eventPtr->type == Expose) {
/*
* This case is tricky. This event was already queued before
* the XCopyArea was issued. If this area overlaps the area
* being copied, then some of the copied area may be invalid.
* The easiest way to handle this case is to mark both the
* original area and the shifted area as damaged.
*/
rect.x = eventPtr->xexpose.x;
rect.y = eventPtr->xexpose.y;
rect.width = eventPtr->xexpose.width;
rect.height = eventPtr->xexpose.height;
XUnionRectWithRegion(&rect, (Region) info->region,
(Region) info->region);
rect.x += info->dx;
rect.y += info->dy;
XUnionRectWithRegion(&rect, (Region) info->region,
(Region) info->region);
} else {
return TK_DEFER_EVENT;
}
return TK_DISCARD_EVENT;
}
/*
*----------------------------------------------------------------------
*
* TkpDrawHighlightBorder --
*
* This procedure draws a rectangular ring around the outside of
* a widget to indicate that it has received the input focus.
*
* On Unix, we just draw the simple inset ring. On other sytems,
* e.g. the Mac, the focus ring is a little more complicated, so we
* need this abstraction.
*
* Results:
* None.
*
* Side effects:
* A rectangle "width" pixels wide is drawn in "drawable",
* corresponding to the outer area of "tkwin".
*
*----------------------------------------------------------------------
*/
void
TkpDrawHighlightBorder(tkwin, fgGC, bgGC, highlightWidth, drawable)
Tk_Window tkwin;
GC fgGC;
GC bgGC;
int highlightWidth;
Drawable drawable;
{
TkDrawInsetFocusHighlight(tkwin, fgGC, highlightWidth, drawable, 0);
}
/*
*----------------------------------------------------------------------
*
* TkpDrawFrame --
*
* This procedure draws the rectangular frame area.
*
* Results:
* None.
*
* Side effects:
* Draws inside the tkwin area.
*
*----------------------------------------------------------------------
*/
void
TkpDrawFrame (Tk_Window tkwin, Tk_3DBorder border,
int highlightWidth, int borderWidth, int relief)
{
Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin),
border, highlightWidth, highlightWidth,
Tk_Width(tkwin) - 2 * highlightWidth,
Tk_Height(tkwin) - 2 * highlightWidth,
borderWidth, relief);
}
|
