| 1 |
dashley |
25 |
/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkwinscrlbr.c,v 1.1.1.1 2001/06/13 05:14:22 dtashley Exp $ */
|
| 2 |
|
|
|
| 3 |
|
|
/*
|
| 4 |
|
|
* tkWinScrollbar.c --
|
| 5 |
|
|
*
|
| 6 |
|
|
* This file implements the Windows specific portion of the scrollbar
|
| 7 |
|
|
* widget.
|
| 8 |
|
|
*
|
| 9 |
|
|
* Copyright (c) 1996 by Sun Microsystems, Inc.
|
| 10 |
|
|
*
|
| 11 |
|
|
* See the file "license.terms" for information on usage and redistribution
|
| 12 |
|
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
| 13 |
|
|
*
|
| 14 |
|
|
* RCS: @(#) $Id: tkwinscrlbr.c,v 1.1.1.1 2001/06/13 05:14:22 dtashley Exp $
|
| 15 |
|
|
*/
|
| 16 |
|
|
|
| 17 |
|
|
#include "tkWinInt.h"
|
| 18 |
|
|
#include "tkScrollbar.h"
|
| 19 |
|
|
|
| 20 |
|
|
|
| 21 |
|
|
/*
|
| 22 |
|
|
* The following constant is used to specify the maximum scroll position.
|
| 23 |
|
|
* This value is limited by the Win32 API to either 16-bits or 32-bits,
|
| 24 |
|
|
* depending on the context. For now we'll just use a value small
|
| 25 |
|
|
* enough to fit in 16-bits, but which gives us 4-digits of precision.
|
| 26 |
|
|
*/
|
| 27 |
|
|
|
| 28 |
|
|
#define MAX_SCROLL 10000
|
| 29 |
|
|
|
| 30 |
|
|
/*
|
| 31 |
|
|
* Declaration of Windows specific scrollbar structure.
|
| 32 |
|
|
*/
|
| 33 |
|
|
|
| 34 |
|
|
typedef struct WinScrollbar {
|
| 35 |
|
|
TkScrollbar info; /* Generic scrollbar info. */
|
| 36 |
|
|
WNDPROC oldProc; /* Old window procedure. */
|
| 37 |
|
|
int lastVertical; /* 1 if was vertical at last refresh. */
|
| 38 |
|
|
HWND hwnd; /* Current window handle. */
|
| 39 |
|
|
int winFlags; /* Various flags; see below. */
|
| 40 |
|
|
} WinScrollbar;
|
| 41 |
|
|
|
| 42 |
|
|
/*
|
| 43 |
|
|
* Flag bits for native scrollbars:
|
| 44 |
|
|
*
|
| 45 |
|
|
* IN_MODAL_LOOP: Non-zero means this scrollbar is in the middle
|
| 46 |
|
|
* of a modal loop.
|
| 47 |
|
|
* ALREADY_DEAD: Non-zero means this scrollbar has been
|
| 48 |
|
|
* destroyed, but has not been cleaned up.
|
| 49 |
|
|
*/
|
| 50 |
|
|
|
| 51 |
|
|
#define IN_MODAL_LOOP 1
|
| 52 |
|
|
#define ALREADY_DEAD 2
|
| 53 |
|
|
|
| 54 |
|
|
/*
|
| 55 |
|
|
* Cached system metrics used to determine scrollbar geometry.
|
| 56 |
|
|
*/
|
| 57 |
|
|
|
| 58 |
|
|
static int initialized = 0;
|
| 59 |
|
|
static int hArrowWidth, hThumb; /* Horizontal control metrics. */
|
| 60 |
|
|
static int vArrowWidth, vArrowHeight, vThumb; /* Vertical control metrics. */
|
| 61 |
|
|
|
| 62 |
|
|
TCL_DECLARE_MUTEX(winScrlbrMutex)
|
| 63 |
|
|
|
| 64 |
|
|
/*
|
| 65 |
|
|
* This variable holds the default width for a scrollbar in string
|
| 66 |
|
|
* form for use in a Tk_ConfigSpec.
|
| 67 |
|
|
*/
|
| 68 |
|
|
|
| 69 |
|
|
static char defWidth[TCL_INTEGER_SPACE];
|
| 70 |
|
|
|
| 71 |
|
|
/*
|
| 72 |
|
|
* Declarations for functions defined in this file.
|
| 73 |
|
|
*/
|
| 74 |
|
|
|
| 75 |
|
|
static Window CreateProc _ANSI_ARGS_((Tk_Window tkwin,
|
| 76 |
|
|
Window parent, ClientData instanceData));
|
| 77 |
|
|
static void ModalLoopProc _ANSI_ARGS_((Tk_Window tkwin,
|
| 78 |
|
|
XEvent *eventPtr));
|
| 79 |
|
|
static int ScrollbarBindProc _ANSI_ARGS_((ClientData clientData,
|
| 80 |
|
|
Tcl_Interp *interp, XEvent *eventPtr,
|
| 81 |
|
|
Tk_Window tkwin, KeySym keySym));
|
| 82 |
|
|
static LRESULT CALLBACK ScrollbarProc _ANSI_ARGS_((HWND hwnd, UINT message,
|
| 83 |
|
|
WPARAM wParam, LPARAM lParam));
|
| 84 |
|
|
static void UpdateScrollbar _ANSI_ARGS_((
|
| 85 |
|
|
WinScrollbar *scrollPtr));
|
| 86 |
|
|
static void UpdateScrollbarMetrics _ANSI_ARGS_((void));
|
| 87 |
|
|
|
| 88 |
|
|
/*
|
| 89 |
|
|
* The class procedure table for the scrollbar widget.
|
| 90 |
|
|
*/
|
| 91 |
|
|
|
| 92 |
|
|
TkClassProcs tkpScrollbarProcs = {
|
| 93 |
|
|
CreateProc, /* createProc */
|
| 94 |
|
|
NULL, /* geometryProc */
|
| 95 |
|
|
ModalLoopProc, /* modalProc */
|
| 96 |
|
|
};
|
| 97 |
|
|
|
| 98 |
|
|
|
| 99 |
|
|
/*
|
| 100 |
|
|
*----------------------------------------------------------------------
|
| 101 |
|
|
*
|
| 102 |
|
|
* TkpCreateScrollbar --
|
| 103 |
|
|
*
|
| 104 |
|
|
* Allocate a new TkScrollbar structure.
|
| 105 |
|
|
*
|
| 106 |
|
|
* Results:
|
| 107 |
|
|
* Returns a newly allocated TkScrollbar structure.
|
| 108 |
|
|
*
|
| 109 |
|
|
* Side effects:
|
| 110 |
|
|
* Registers an event handler for the widget.
|
| 111 |
|
|
*
|
| 112 |
|
|
*----------------------------------------------------------------------
|
| 113 |
|
|
*/
|
| 114 |
|
|
|
| 115 |
|
|
TkScrollbar *
|
| 116 |
|
|
TkpCreateScrollbar(tkwin)
|
| 117 |
|
|
Tk_Window tkwin;
|
| 118 |
|
|
{
|
| 119 |
|
|
WinScrollbar *scrollPtr;
|
| 120 |
|
|
TkWindow *winPtr = (TkWindow *)tkwin;
|
| 121 |
|
|
|
| 122 |
|
|
if (!initialized) {
|
| 123 |
|
|
Tcl_MutexLock(&winScrlbrMutex);
|
| 124 |
|
|
UpdateScrollbarMetrics();
|
| 125 |
|
|
initialized = 1;
|
| 126 |
|
|
Tcl_MutexUnlock(&winScrlbrMutex);
|
| 127 |
|
|
}
|
| 128 |
|
|
|
| 129 |
|
|
scrollPtr = (WinScrollbar *) ckalloc(sizeof(WinScrollbar));
|
| 130 |
|
|
scrollPtr->winFlags = 0;
|
| 131 |
|
|
scrollPtr->hwnd = NULL;
|
| 132 |
|
|
|
| 133 |
|
|
Tk_CreateEventHandler(tkwin,
|
| 134 |
|
|
ExposureMask|StructureNotifyMask|FocusChangeMask,
|
| 135 |
|
|
TkScrollbarEventProc, (ClientData) scrollPtr);
|
| 136 |
|
|
|
| 137 |
|
|
if (!Tcl_GetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL)) {
|
| 138 |
|
|
Tcl_SetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL,
|
| 139 |
|
|
(ClientData)1);
|
| 140 |
|
|
TkCreateBindingProcedure(winPtr->mainPtr->interp,
|
| 141 |
|
|
winPtr->mainPtr->bindingTable,
|
| 142 |
|
|
(ClientData)Tk_GetUid("Scrollbar"), "<ButtonPress>",
|
| 143 |
|
|
ScrollbarBindProc, NULL, NULL);
|
| 144 |
|
|
}
|
| 145 |
|
|
|
| 146 |
|
|
return (TkScrollbar*) scrollPtr;
|
| 147 |
|
|
}
|
| 148 |
|
|
|
| 149 |
|
|
/*
|
| 150 |
|
|
*----------------------------------------------------------------------
|
| 151 |
|
|
*
|
| 152 |
|
|
* UpdateScrollbar --
|
| 153 |
|
|
*
|
| 154 |
|
|
* This function updates the position and size of the scrollbar
|
| 155 |
|
|
* thumb based on the current settings.
|
| 156 |
|
|
*
|
| 157 |
|
|
* Results:
|
| 158 |
|
|
* None.
|
| 159 |
|
|
*
|
| 160 |
|
|
* Side effects:
|
| 161 |
|
|
* Moves the thumb.
|
| 162 |
|
|
*
|
| 163 |
|
|
*----------------------------------------------------------------------
|
| 164 |
|
|
*/
|
| 165 |
|
|
|
| 166 |
|
|
static void
|
| 167 |
|
|
UpdateScrollbar(scrollPtr)
|
| 168 |
|
|
WinScrollbar *scrollPtr;
|
| 169 |
|
|
{
|
| 170 |
|
|
SCROLLINFO scrollInfo;
|
| 171 |
|
|
double thumbSize;
|
| 172 |
|
|
|
| 173 |
|
|
/*
|
| 174 |
|
|
* Update the current scrollbar position and shape.
|
| 175 |
|
|
*/
|
| 176 |
|
|
|
| 177 |
|
|
scrollInfo.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
|
| 178 |
|
|
scrollInfo.cbSize = sizeof(scrollInfo);
|
| 179 |
|
|
scrollInfo.nMin = 0;
|
| 180 |
|
|
scrollInfo.nMax = MAX_SCROLL;
|
| 181 |
|
|
thumbSize = (scrollPtr->info.lastFraction - scrollPtr->info.firstFraction);
|
| 182 |
|
|
scrollInfo.nPage = ((UINT) (thumbSize * (double) MAX_SCROLL)) + 1;
|
| 183 |
|
|
if (thumbSize < 1.0) {
|
| 184 |
|
|
scrollInfo.nPos = (int)
|
| 185 |
|
|
((scrollPtr->info.firstFraction / (1.0-thumbSize))
|
| 186 |
|
|
* (MAX_SCROLL - (scrollInfo.nPage - 1)));
|
| 187 |
|
|
} else {
|
| 188 |
|
|
scrollInfo.nPos = 0;
|
| 189 |
|
|
}
|
| 190 |
|
|
SetScrollInfo(scrollPtr->hwnd, SB_CTL, &scrollInfo, TRUE);
|
| 191 |
|
|
}
|
| 192 |
|
|
|
| 193 |
|
|
/*
|
| 194 |
|
|
*----------------------------------------------------------------------
|
| 195 |
|
|
*
|
| 196 |
|
|
* CreateProc --
|
| 197 |
|
|
*
|
| 198 |
|
|
* This function creates a new Scrollbar control, subclasses
|
| 199 |
|
|
* the instance, and generates a new Window object.
|
| 200 |
|
|
*
|
| 201 |
|
|
* Results:
|
| 202 |
|
|
* Returns the newly allocated Window object, or None on failure.
|
| 203 |
|
|
*
|
| 204 |
|
|
* Side effects:
|
| 205 |
|
|
* Causes a new Scrollbar control to come into existence.
|
| 206 |
|
|
*
|
| 207 |
|
|
*----------------------------------------------------------------------
|
| 208 |
|
|
*/
|
| 209 |
|
|
|
| 210 |
|
|
static Window
|
| 211 |
|
|
CreateProc(tkwin, parentWin, instanceData)
|
| 212 |
|
|
Tk_Window tkwin; /* Token for window. */
|
| 213 |
|
|
Window parentWin; /* Parent of new window. */
|
| 214 |
|
|
ClientData instanceData; /* Scrollbar instance data. */
|
| 215 |
|
|
{
|
| 216 |
|
|
DWORD style;
|
| 217 |
|
|
Window window;
|
| 218 |
|
|
HWND parent;
|
| 219 |
|
|
TkWindow *winPtr;
|
| 220 |
|
|
WinScrollbar *scrollPtr = (WinScrollbar *)instanceData;
|
| 221 |
|
|
|
| 222 |
|
|
parent = Tk_GetHWND(parentWin);
|
| 223 |
|
|
|
| 224 |
|
|
if (scrollPtr->info.vertical) {
|
| 225 |
|
|
style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS
|
| 226 |
|
|
| SBS_VERT | SBS_RIGHTALIGN;
|
| 227 |
|
|
} else {
|
| 228 |
|
|
style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS
|
| 229 |
|
|
| SBS_HORZ | SBS_BOTTOMALIGN;
|
| 230 |
|
|
}
|
| 231 |
|
|
|
| 232 |
|
|
scrollPtr->hwnd = CreateWindow("SCROLLBAR", NULL, style,
|
| 233 |
|
|
Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin),
|
| 234 |
|
|
parent, NULL, Tk_GetHINSTANCE(), NULL);
|
| 235 |
|
|
|
| 236 |
|
|
/*
|
| 237 |
|
|
* Ensure new window is inserted into the stacking order at the correct
|
| 238 |
|
|
* place.
|
| 239 |
|
|
*/
|
| 240 |
|
|
|
| 241 |
|
|
SetWindowPos(scrollPtr->hwnd, HWND_TOP, 0, 0, 0, 0,
|
| 242 |
|
|
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
|
| 243 |
|
|
|
| 244 |
|
|
for (winPtr = ((TkWindow*)tkwin)->nextPtr; winPtr != NULL;
|
| 245 |
|
|
winPtr = winPtr->nextPtr) {
|
| 246 |
|
|
if ((winPtr->window != None) && !(winPtr->flags & TK_TOP_LEVEL)) {
|
| 247 |
|
|
TkWinSetWindowPos(scrollPtr->hwnd, Tk_GetHWND(winPtr->window),
|
| 248 |
|
|
Below);
|
| 249 |
|
|
break;
|
| 250 |
|
|
}
|
| 251 |
|
|
}
|
| 252 |
|
|
|
| 253 |
|
|
scrollPtr->lastVertical = scrollPtr->info.vertical;
|
| 254 |
|
|
scrollPtr->oldProc = (WNDPROC)SetWindowLong(scrollPtr->hwnd, GWL_WNDPROC,
|
| 255 |
|
|
(DWORD) ScrollbarProc);
|
| 256 |
|
|
window = Tk_AttachHWND(tkwin, scrollPtr->hwnd);
|
| 257 |
|
|
|
| 258 |
|
|
UpdateScrollbar(scrollPtr);
|
| 259 |
|
|
return window;
|
| 260 |
|
|
}
|
| 261 |
|
|
|
| 262 |
|
|
/*
|
| 263 |
|
|
*--------------------------------------------------------------
|
| 264 |
|
|
*
|
| 265 |
|
|
* TkpDisplayScrollbar --
|
| 266 |
|
|
*
|
| 267 |
|
|
* This procedure redraws the contents of a scrollbar window.
|
| 268 |
|
|
* It is invoked as a do-when-idle handler, so it only runs
|
| 269 |
|
|
* when there's nothing else for the application to do.
|
| 270 |
|
|
*
|
| 271 |
|
|
* Results:
|
| 272 |
|
|
* None.
|
| 273 |
|
|
*
|
| 274 |
|
|
* Side effects:
|
| 275 |
|
|
* Information appears on the screen.
|
| 276 |
|
|
*
|
| 277 |
|
|
*--------------------------------------------------------------
|
| 278 |
|
|
*/
|
| 279 |
|
|
|
| 280 |
|
|
void
|
| 281 |
|
|
TkpDisplayScrollbar(clientData)
|
| 282 |
|
|
ClientData clientData; /* Information about window. */
|
| 283 |
|
|
{
|
| 284 |
|
|
WinScrollbar *scrollPtr = (WinScrollbar *) clientData;
|
| 285 |
|
|
Tk_Window tkwin = scrollPtr->info.tkwin;
|
| 286 |
|
|
|
| 287 |
|
|
scrollPtr->info.flags &= ~REDRAW_PENDING;
|
| 288 |
|
|
if ((tkwin == NULL) || !Tk_IsMapped(tkwin)) {
|
| 289 |
|
|
return;
|
| 290 |
|
|
}
|
| 291 |
|
|
|
| 292 |
|
|
/*
|
| 293 |
|
|
* Destroy and recreate the scrollbar control if the orientation
|
| 294 |
|
|
* has changed.
|
| 295 |
|
|
*/
|
| 296 |
|
|
|
| 297 |
|
|
if (scrollPtr->lastVertical != scrollPtr->info.vertical) {
|
| 298 |
|
|
HWND hwnd = Tk_GetHWND(Tk_WindowId(tkwin));
|
| 299 |
|
|
|
| 300 |
|
|
SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) scrollPtr->oldProc);
|
| 301 |
|
|
DestroyWindow(hwnd);
|
| 302 |
|
|
|
| 303 |
|
|
CreateProc(tkwin, Tk_WindowId(Tk_Parent(tkwin)),
|
| 304 |
|
|
(ClientData) scrollPtr);
|
| 305 |
|
|
} else {
|
| 306 |
|
|
UpdateScrollbar(scrollPtr);
|
| 307 |
|
|
}
|
| 308 |
|
|
}
|
| 309 |
|
|
|
| 310 |
|
|
/*
|
| 311 |
|
|
*----------------------------------------------------------------------
|
| 312 |
|
|
*
|
| 313 |
|
|
* TkpDestroyScrollbar --
|
| 314 |
|
|
*
|
| 315 |
|
|
* Free data structures associated with the scrollbar control.
|
| 316 |
|
|
*
|
| 317 |
|
|
* Results:
|
| 318 |
|
|
* None.
|
| 319 |
|
|
*
|
| 320 |
|
|
* Side effects:
|
| 321 |
|
|
* Restores the default control state.
|
| 322 |
|
|
*
|
| 323 |
|
|
*----------------------------------------------------------------------
|
| 324 |
|
|
*/
|
| 325 |
|
|
|
| 326 |
|
|
void
|
| 327 |
|
|
TkpDestroyScrollbar(scrollPtr)
|
| 328 |
|
|
TkScrollbar *scrollPtr;
|
| 329 |
|
|
{
|
| 330 |
|
|
WinScrollbar *winScrollPtr = (WinScrollbar *)scrollPtr;
|
| 331 |
|
|
HWND hwnd = winScrollPtr->hwnd;
|
| 332 |
|
|
if (hwnd) {
|
| 333 |
|
|
SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) winScrollPtr->oldProc);
|
| 334 |
|
|
if (winScrollPtr->winFlags & IN_MODAL_LOOP) {
|
| 335 |
|
|
((TkWindow *)scrollPtr->tkwin)->flags |= TK_DONT_DESTROY_WINDOW;
|
| 336 |
|
|
SetParent(hwnd, NULL);
|
| 337 |
|
|
}
|
| 338 |
|
|
}
|
| 339 |
|
|
winScrollPtr->winFlags |= ALREADY_DEAD;
|
| 340 |
|
|
}
|
| 341 |
|
|
|
| 342 |
|
|
/*
|
| 343 |
|
|
*----------------------------------------------------------------------
|
| 344 |
|
|
*
|
| 345 |
|
|
* UpdateScrollbarMetrics --
|
| 346 |
|
|
*
|
| 347 |
|
|
* This function retrieves the current system metrics for a
|
| 348 |
|
|
* scrollbar.
|
| 349 |
|
|
*
|
| 350 |
|
|
* Results:
|
| 351 |
|
|
* None.
|
| 352 |
|
|
*
|
| 353 |
|
|
* Side effects:
|
| 354 |
|
|
* Updates the geometry cache info for all scrollbars.
|
| 355 |
|
|
*
|
| 356 |
|
|
*----------------------------------------------------------------------
|
| 357 |
|
|
*/
|
| 358 |
|
|
|
| 359 |
|
|
void
|
| 360 |
|
|
UpdateScrollbarMetrics()
|
| 361 |
|
|
{
|
| 362 |
|
|
Tk_ConfigSpec *specPtr;
|
| 363 |
|
|
|
| 364 |
|
|
hArrowWidth = GetSystemMetrics(SM_CXHSCROLL);
|
| 365 |
|
|
hThumb = GetSystemMetrics(SM_CXHTHUMB);
|
| 366 |
|
|
vArrowWidth = GetSystemMetrics(SM_CXVSCROLL);
|
| 367 |
|
|
vArrowHeight = GetSystemMetrics(SM_CYVSCROLL);
|
| 368 |
|
|
vThumb = GetSystemMetrics(SM_CYVTHUMB);
|
| 369 |
|
|
|
| 370 |
|
|
sprintf(defWidth, "%d", vArrowWidth);
|
| 371 |
|
|
for (specPtr = tkpScrollbarConfigSpecs; specPtr->type != TK_CONFIG_END;
|
| 372 |
|
|
specPtr++) {
|
| 373 |
|
|
if (specPtr->offset == Tk_Offset(TkScrollbar, width)) {
|
| 374 |
|
|
specPtr->defValue = defWidth;
|
| 375 |
|
|
}
|
| 376 |
|
|
}
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
/*
|
| 380 |
|
|
*----------------------------------------------------------------------
|
| 381 |
|
|
*
|
| 382 |
|
|
* TkpComputeScrollbarGeometry --
|
| 383 |
|
|
*
|
| 384 |
|
|
* After changes in a scrollbar's size or configuration, this
|
| 385 |
|
|
* procedure recomputes various geometry information used in
|
| 386 |
|
|
* displaying the scrollbar.
|
| 387 |
|
|
*
|
| 388 |
|
|
* Results:
|
| 389 |
|
|
* None.
|
| 390 |
|
|
*
|
| 391 |
|
|
* Side effects:
|
| 392 |
|
|
* The scrollbar will be displayed differently.
|
| 393 |
|
|
*
|
| 394 |
|
|
*----------------------------------------------------------------------
|
| 395 |
|
|
*/
|
| 396 |
|
|
|
| 397 |
|
|
void
|
| 398 |
|
|
TkpComputeScrollbarGeometry(scrollPtr)
|
| 399 |
|
|
register TkScrollbar *scrollPtr; /* Scrollbar whose geometry may
|
| 400 |
|
|
* have changed. */
|
| 401 |
|
|
{
|
| 402 |
|
|
int fieldLength, minThumbSize;
|
| 403 |
|
|
|
| 404 |
|
|
/*
|
| 405 |
|
|
* Windows doesn't use focus rings on scrollbars, but we still
|
| 406 |
|
|
* perform basic sanity checks to appease backwards compatibility.
|
| 407 |
|
|
*/
|
| 408 |
|
|
|
| 409 |
|
|
if (scrollPtr->highlightWidth < 0) {
|
| 410 |
|
|
scrollPtr->highlightWidth = 0;
|
| 411 |
|
|
}
|
| 412 |
|
|
|
| 413 |
|
|
if (scrollPtr->vertical) {
|
| 414 |
|
|
scrollPtr->arrowLength = vArrowHeight;
|
| 415 |
|
|
fieldLength = Tk_Height(scrollPtr->tkwin);
|
| 416 |
|
|
minThumbSize = vThumb;
|
| 417 |
|
|
} else {
|
| 418 |
|
|
scrollPtr->arrowLength = hArrowWidth;
|
| 419 |
|
|
fieldLength = Tk_Width(scrollPtr->tkwin);
|
| 420 |
|
|
minThumbSize = hThumb;
|
| 421 |
|
|
}
|
| 422 |
|
|
fieldLength -= 2*scrollPtr->arrowLength;
|
| 423 |
|
|
if (fieldLength < 0) {
|
| 424 |
|
|
fieldLength = 0;
|
| 425 |
|
|
}
|
| 426 |
|
|
scrollPtr->sliderFirst = (int) ((double)fieldLength
|
| 427 |
|
|
* scrollPtr->firstFraction);
|
| 428 |
|
|
scrollPtr->sliderLast = (int) ((double)fieldLength
|
| 429 |
|
|
* scrollPtr->lastFraction);
|
| 430 |
|
|
|
| 431 |
|
|
/*
|
| 432 |
|
|
* Adjust the slider so that some piece of it is always
|
| 433 |
|
|
* displayed in the scrollbar and so that it has at least
|
| 434 |
|
|
* a minimal width (so it can be grabbed with the mouse).
|
| 435 |
|
|
*/
|
| 436 |
|
|
|
| 437 |
|
|
if (scrollPtr->sliderFirst > fieldLength) {
|
| 438 |
|
|
scrollPtr->sliderFirst = fieldLength;
|
| 439 |
|
|
}
|
| 440 |
|
|
if (scrollPtr->sliderFirst < 0) {
|
| 441 |
|
|
scrollPtr->sliderFirst = 0;
|
| 442 |
|
|
}
|
| 443 |
|
|
if (scrollPtr->sliderLast < (scrollPtr->sliderFirst
|
| 444 |
|
|
+ minThumbSize)) {
|
| 445 |
|
|
scrollPtr->sliderLast = scrollPtr->sliderFirst + minThumbSize;
|
| 446 |
|
|
}
|
| 447 |
|
|
if (scrollPtr->sliderLast > fieldLength) {
|
| 448 |
|
|
scrollPtr->sliderLast = fieldLength;
|
| 449 |
|
|
}
|
| 450 |
|
|
scrollPtr->sliderFirst += scrollPtr->arrowLength;
|
| 451 |
|
|
scrollPtr->sliderLast += scrollPtr->arrowLength;
|
| 452 |
|
|
|
| 453 |
|
|
/*
|
| 454 |
|
|
* Register the desired geometry for the window (leave enough space
|
| 455 |
|
|
* for the two arrows plus a minimum-size slider, plus border around
|
| 456 |
|
|
* the whole window, if any). Then arrange for the window to be
|
| 457 |
|
|
* redisplayed.
|
| 458 |
|
|
*/
|
| 459 |
|
|
|
| 460 |
|
|
if (scrollPtr->vertical) {
|
| 461 |
|
|
Tk_GeometryRequest(scrollPtr->tkwin,
|
| 462 |
|
|
scrollPtr->width, 2*scrollPtr->arrowLength + minThumbSize);
|
| 463 |
|
|
} else {
|
| 464 |
|
|
Tk_GeometryRequest(scrollPtr->tkwin,
|
| 465 |
|
|
2*scrollPtr->arrowLength + minThumbSize, scrollPtr->width);
|
| 466 |
|
|
}
|
| 467 |
|
|
Tk_SetInternalBorder(scrollPtr->tkwin, 0);
|
| 468 |
|
|
}
|
| 469 |
|
|
|
| 470 |
|
|
/*
|
| 471 |
|
|
*----------------------------------------------------------------------
|
| 472 |
|
|
*
|
| 473 |
|
|
* ScrollbarProc --
|
| 474 |
|
|
*
|
| 475 |
|
|
* This function is call by Windows whenever an event occurs on
|
| 476 |
|
|
* a scrollbar control created by Tk.
|
| 477 |
|
|
*
|
| 478 |
|
|
* Results:
|
| 479 |
|
|
* Standard Windows return value.
|
| 480 |
|
|
*
|
| 481 |
|
|
* Side effects:
|
| 482 |
|
|
* May generate events.
|
| 483 |
|
|
*
|
| 484 |
|
|
*----------------------------------------------------------------------
|
| 485 |
|
|
*/
|
| 486 |
|
|
|
| 487 |
|
|
static LRESULT CALLBACK
|
| 488 |
|
|
ScrollbarProc(hwnd, message, wParam, lParam)
|
| 489 |
|
|
HWND hwnd;
|
| 490 |
|
|
UINT message;
|
| 491 |
|
|
WPARAM wParam;
|
| 492 |
|
|
LPARAM lParam;
|
| 493 |
|
|
{
|
| 494 |
|
|
LRESULT result;
|
| 495 |
|
|
POINT point;
|
| 496 |
|
|
WinScrollbar *scrollPtr;
|
| 497 |
|
|
Tk_Window tkwin = Tk_HWNDToWindow(hwnd);
|
| 498 |
|
|
|
| 499 |
|
|
if (tkwin == NULL) {
|
| 500 |
|
|
panic("ScrollbarProc called on an invalid HWND");
|
| 501 |
|
|
}
|
| 502 |
|
|
scrollPtr = (WinScrollbar *)((TkWindow*)tkwin)->instanceData;
|
| 503 |
|
|
|
| 504 |
|
|
switch(message) {
|
| 505 |
|
|
case WM_HSCROLL:
|
| 506 |
|
|
case WM_VSCROLL: {
|
| 507 |
|
|
Tcl_Interp *interp;
|
| 508 |
|
|
Tcl_DString cmdString;
|
| 509 |
|
|
int command = LOWORD(wParam);
|
| 510 |
|
|
int code;
|
| 511 |
|
|
|
| 512 |
|
|
GetCursorPos(&point);
|
| 513 |
|
|
Tk_TranslateWinEvent(NULL, WM_MOUSEMOVE, 0,
|
| 514 |
|
|
MAKELPARAM(point.x, point.y), &result);
|
| 515 |
|
|
|
| 516 |
|
|
if (command == SB_ENDSCROLL) {
|
| 517 |
|
|
return 0;
|
| 518 |
|
|
}
|
| 519 |
|
|
|
| 520 |
|
|
/*
|
| 521 |
|
|
* Bail out immediately if there isn't a command to invoke.
|
| 522 |
|
|
*/
|
| 523 |
|
|
|
| 524 |
|
|
if (scrollPtr->info.commandSize == 0) {
|
| 525 |
|
|
Tcl_ServiceAll();
|
| 526 |
|
|
return 0;
|
| 527 |
|
|
}
|
| 528 |
|
|
|
| 529 |
|
|
Tcl_DStringInit(&cmdString);
|
| 530 |
|
|
Tcl_DStringAppend(&cmdString, scrollPtr->info.command,
|
| 531 |
|
|
scrollPtr->info.commandSize);
|
| 532 |
|
|
|
| 533 |
|
|
if (command == SB_LINELEFT || command == SB_LINERIGHT) {
|
| 534 |
|
|
Tcl_DStringAppendElement(&cmdString, "scroll");
|
| 535 |
|
|
Tcl_DStringAppendElement(&cmdString,
|
| 536 |
|
|
(command == SB_LINELEFT ) ? "-1" : "1");
|
| 537 |
|
|
Tcl_DStringAppendElement(&cmdString, "units");
|
| 538 |
|
|
} else if (command == SB_PAGELEFT || command == SB_PAGERIGHT) {
|
| 539 |
|
|
Tcl_DStringAppendElement(&cmdString, "scroll");
|
| 540 |
|
|
Tcl_DStringAppendElement(&cmdString,
|
| 541 |
|
|
(command == SB_PAGELEFT ) ? "-1" : "1");
|
| 542 |
|
|
Tcl_DStringAppendElement(&cmdString, "pages");
|
| 543 |
|
|
} else {
|
| 544 |
|
|
char valueString[TCL_DOUBLE_SPACE];
|
| 545 |
|
|
double pos = 0.0;
|
| 546 |
|
|
switch (command) {
|
| 547 |
|
|
case SB_THUMBPOSITION:
|
| 548 |
|
|
pos = ((double)HIWORD(wParam)) / MAX_SCROLL;
|
| 549 |
|
|
break;
|
| 550 |
|
|
|
| 551 |
|
|
case SB_THUMBTRACK:
|
| 552 |
|
|
pos = ((double)HIWORD(wParam)) / MAX_SCROLL;
|
| 553 |
|
|
break;
|
| 554 |
|
|
|
| 555 |
|
|
case SB_TOP:
|
| 556 |
|
|
pos = 0.0;
|
| 557 |
|
|
break;
|
| 558 |
|
|
|
| 559 |
|
|
case SB_BOTTOM:
|
| 560 |
|
|
pos = 1.0;
|
| 561 |
|
|
break;
|
| 562 |
|
|
}
|
| 563 |
|
|
sprintf(valueString, "%g", pos);
|
| 564 |
|
|
Tcl_DStringAppendElement(&cmdString, "moveto");
|
| 565 |
|
|
Tcl_DStringAppendElement(&cmdString, valueString);
|
| 566 |
|
|
}
|
| 567 |
|
|
|
| 568 |
|
|
interp = scrollPtr->info.interp;
|
| 569 |
|
|
code = Tcl_GlobalEval(interp, cmdString.string);
|
| 570 |
|
|
if (code != TCL_OK && code != TCL_CONTINUE && code != TCL_BREAK) {
|
| 571 |
|
|
Tcl_AddErrorInfo(interp, "\n (scrollbar command)");
|
| 572 |
|
|
Tcl_BackgroundError(interp);
|
| 573 |
|
|
}
|
| 574 |
|
|
Tcl_DStringFree(&cmdString);
|
| 575 |
|
|
|
| 576 |
|
|
Tcl_ServiceAll();
|
| 577 |
|
|
return 0;
|
| 578 |
|
|
}
|
| 579 |
|
|
|
| 580 |
|
|
default:
|
| 581 |
|
|
if (Tk_TranslateWinEvent(hwnd, message, wParam, lParam, &result)) {
|
| 582 |
|
|
return result;
|
| 583 |
|
|
}
|
| 584 |
|
|
}
|
| 585 |
|
|
return CallWindowProc(scrollPtr->oldProc, hwnd, message, wParam, lParam);
|
| 586 |
|
|
}
|
| 587 |
|
|
|
| 588 |
|
|
/*
|
| 589 |
|
|
*----------------------------------------------------------------------
|
| 590 |
|
|
*
|
| 591 |
|
|
* TkpConfigureScrollbar --
|
| 592 |
|
|
*
|
| 593 |
|
|
* This procedure is called after the generic code has finished
|
| 594 |
|
|
* processing configuration options, in order to configure
|
| 595 |
|
|
* platform specific options.
|
| 596 |
|
|
*
|
| 597 |
|
|
* Results:
|
| 598 |
|
|
* None.
|
| 599 |
|
|
*
|
| 600 |
|
|
* Side effects:
|
| 601 |
|
|
* None.
|
| 602 |
|
|
*
|
| 603 |
|
|
*----------------------------------------------------------------------
|
| 604 |
|
|
*/
|
| 605 |
|
|
|
| 606 |
|
|
void
|
| 607 |
|
|
TkpConfigureScrollbar(scrollPtr)
|
| 608 |
|
|
register TkScrollbar *scrollPtr; /* Information about widget; may or
|
| 609 |
|
|
* may not already have values for
|
| 610 |
|
|
* some fields. */
|
| 611 |
|
|
{
|
| 612 |
|
|
}
|
| 613 |
|
|
|
| 614 |
|
|
/*
|
| 615 |
|
|
*--------------------------------------------------------------
|
| 616 |
|
|
*
|
| 617 |
|
|
* ScrollbarBindProc --
|
| 618 |
|
|
*
|
| 619 |
|
|
* This procedure is invoked when the default <ButtonPress>
|
| 620 |
|
|
* binding on the Scrollbar bind tag fires.
|
| 621 |
|
|
*
|
| 622 |
|
|
* Results:
|
| 623 |
|
|
* None.
|
| 624 |
|
|
*
|
| 625 |
|
|
* Side effects:
|
| 626 |
|
|
* The event enters a modal loop.
|
| 627 |
|
|
*
|
| 628 |
|
|
*--------------------------------------------------------------
|
| 629 |
|
|
*/
|
| 630 |
|
|
|
| 631 |
|
|
static int
|
| 632 |
|
|
ScrollbarBindProc(clientData, interp, eventPtr, tkwin, keySym)
|
| 633 |
|
|
ClientData clientData;
|
| 634 |
|
|
Tcl_Interp *interp;
|
| 635 |
|
|
XEvent *eventPtr;
|
| 636 |
|
|
Tk_Window tkwin;
|
| 637 |
|
|
KeySym keySym;
|
| 638 |
|
|
{
|
| 639 |
|
|
TkWindow *winPtr = (TkWindow*)tkwin;
|
| 640 |
|
|
if (eventPtr->type == ButtonPress) {
|
| 641 |
|
|
winPtr->flags |= TK_DEFER_MODAL;
|
| 642 |
|
|
}
|
| 643 |
|
|
return TCL_OK;
|
| 644 |
|
|
}
|
| 645 |
|
|
|
| 646 |
|
|
/*
|
| 647 |
|
|
*----------------------------------------------------------------------
|
| 648 |
|
|
*
|
| 649 |
|
|
* ModalLoopProc --
|
| 650 |
|
|
*
|
| 651 |
|
|
* This function is invoked at the end of the event processing
|
| 652 |
|
|
* whenever the ScrollbarBindProc has been invoked for a ButtonPress
|
| 653 |
|
|
* event.
|
| 654 |
|
|
*
|
| 655 |
|
|
* Results:
|
| 656 |
|
|
* None.
|
| 657 |
|
|
*
|
| 658 |
|
|
* Side effects:
|
| 659 |
|
|
* Enters a modal loop.
|
| 660 |
|
|
*
|
| 661 |
|
|
*----------------------------------------------------------------------
|
| 662 |
|
|
*/
|
| 663 |
|
|
|
| 664 |
|
|
static void
|
| 665 |
|
|
ModalLoopProc(tkwin, eventPtr)
|
| 666 |
|
|
Tk_Window tkwin;
|
| 667 |
|
|
XEvent *eventPtr;
|
| 668 |
|
|
{
|
| 669 |
|
|
TkWindow *winPtr = (TkWindow*)tkwin;
|
| 670 |
|
|
WinScrollbar *scrollPtr = (WinScrollbar *) winPtr->instanceData;
|
| 671 |
|
|
int oldMode;
|
| 672 |
|
|
|
| 673 |
|
|
if (scrollPtr->hwnd) {
|
| 674 |
|
|
Tcl_Preserve((ClientData)scrollPtr);
|
| 675 |
|
|
scrollPtr->winFlags |= IN_MODAL_LOOP;
|
| 676 |
|
|
oldMode = Tcl_SetServiceMode(TCL_SERVICE_ALL);
|
| 677 |
|
|
TkWinResendEvent(scrollPtr->oldProc, scrollPtr->hwnd, eventPtr);
|
| 678 |
|
|
(void) Tcl_SetServiceMode(oldMode);
|
| 679 |
|
|
scrollPtr->winFlags &= ~IN_MODAL_LOOP;
|
| 680 |
|
|
if (scrollPtr->hwnd && scrollPtr->winFlags & ALREADY_DEAD) {
|
| 681 |
|
|
DestroyWindow(scrollPtr->hwnd);
|
| 682 |
|
|
}
|
| 683 |
|
|
Tcl_Release((ClientData)scrollPtr);
|
| 684 |
|
|
}
|
| 685 |
|
|
}
|
| 686 |
|
|
|
| 687 |
|
|
/*
|
| 688 |
|
|
*--------------------------------------------------------------
|
| 689 |
|
|
*
|
| 690 |
|
|
* TkpScrollbarPosition --
|
| 691 |
|
|
*
|
| 692 |
|
|
* Determine the scrollbar element corresponding to a
|
| 693 |
|
|
* given position.
|
| 694 |
|
|
*
|
| 695 |
|
|
* Results:
|
| 696 |
|
|
* One of TOP_ARROW, TOP_GAP, etc., indicating which element
|
| 697 |
|
|
* of the scrollbar covers the position given by (x, y). If
|
| 698 |
|
|
* (x,y) is outside the scrollbar entirely, then OUTSIDE is
|
| 699 |
|
|
* returned.
|
| 700 |
|
|
*
|
| 701 |
|
|
* Side effects:
|
| 702 |
|
|
* None.
|
| 703 |
|
|
*
|
| 704 |
|
|
*--------------------------------------------------------------
|
| 705 |
|
|
*/
|
| 706 |
|
|
|
| 707 |
|
|
int
|
| 708 |
|
|
TkpScrollbarPosition(scrollPtr, x, y)
|
| 709 |
|
|
register TkScrollbar *scrollPtr; /* Scrollbar widget record. */
|
| 710 |
|
|
int x, y; /* Coordinates within scrollPtr's
|
| 711 |
|
|
* window. */
|
| 712 |
|
|
{
|
| 713 |
|
|
int length, width, tmp;
|
| 714 |
|
|
|
| 715 |
|
|
if (scrollPtr->vertical) {
|
| 716 |
|
|
length = Tk_Height(scrollPtr->tkwin);
|
| 717 |
|
|
width = Tk_Width(scrollPtr->tkwin);
|
| 718 |
|
|
} else {
|
| 719 |
|
|
tmp = x;
|
| 720 |
|
|
x = y;
|
| 721 |
|
|
y = tmp;
|
| 722 |
|
|
length = Tk_Width(scrollPtr->tkwin);
|
| 723 |
|
|
width = Tk_Height(scrollPtr->tkwin);
|
| 724 |
|
|
}
|
| 725 |
|
|
|
| 726 |
|
|
if ((x < scrollPtr->inset) || (x >= (width - scrollPtr->inset))
|
| 727 |
|
|
|| (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) {
|
| 728 |
|
|
return OUTSIDE;
|
| 729 |
|
|
}
|
| 730 |
|
|
|
| 731 |
|
|
/*
|
| 732 |
|
|
* All of the calculations in this procedure mirror those in
|
| 733 |
|
|
* TkpDisplayScrollbar. Be sure to keep the two consistent.
|
| 734 |
|
|
*/
|
| 735 |
|
|
|
| 736 |
|
|
if (y < (scrollPtr->inset + scrollPtr->arrowLength)) {
|
| 737 |
|
|
return TOP_ARROW;
|
| 738 |
|
|
}
|
| 739 |
|
|
if (y < scrollPtr->sliderFirst) {
|
| 740 |
|
|
return TOP_GAP;
|
| 741 |
|
|
}
|
| 742 |
|
|
if (y < scrollPtr->sliderLast) {
|
| 743 |
|
|
return SLIDER;
|
| 744 |
|
|
}
|
| 745 |
|
|
if (y >= (length - (scrollPtr->arrowLength + scrollPtr->inset))) {
|
| 746 |
|
|
return BOTTOM_ARROW;
|
| 747 |
|
|
}
|
| 748 |
|
|
return BOTTOM_GAP;
|
| 749 |
|
|
}
|
| 750 |
|
|
|
| 751 |
|
|
|
| 752 |
|
|
/* $History: tkWinScrlbr.c $
|
| 753 |
|
|
*
|
| 754 |
|
|
* ***************** Version 1 *****************
|
| 755 |
|
|
* User: Dtashley Date: 1/02/01 Time: 3:19a
|
| 756 |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
| 757 |
|
|
* Initial check-in.
|
| 758 |
|
|
*/
|
| 759 |
|
|
|
| 760 |
|
|
/* End of TKWINSCRLBR.C */ |
Parent Directory
| 
Revision Log