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goma / wine / ac6325e4bbfa6ba9ace5c98787ef770325ddf051 / . / dlls / comctl32 / trackbar.c
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/*
* Trackbar control
*
* Copyright 1998, 1999 Eric Kohl
* Copyright 1998, 1999 Alex Priem
* Copyright 2002 Dimitrie O. Paun
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTE
*
* This code was audited for completeness against the documented features
* of Comctl32.dll version 6.0 on Sep. 12, 2002, by Dimitrie O. Paun.
*
* Unless otherwise noted, we believe this code to be complete, as per
* the specification mentioned above.
* If you discover missing features, or bugs, please note them below.
*
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "commctrl.h"
#include "uxtheme.h"
#include "vssym32.h"
#include "wine/debug.h"
#include "comctl32.h"
WINE_DEFAULT_DEBUG_CHANNEL(trackbar);
typedef struct
{
HWND hwndSelf;
DWORD dwStyle;
LONG lRangeMin;
LONG lRangeMax;
LONG lLineSize;
LONG lPageSize;
LONG lSelMin;
LONG lSelMax;
LONG lPos;
UINT uThumbLen;
UINT uNumTics;
UINT uTicFreq;
HWND hwndNotify;
HWND hwndToolTip;
HWND hwndBuddyLA;
HWND hwndBuddyRB;
INT fLocation;
INT flags;
BOOL bUnicode;
BOOL bFocussed;
RECT rcChannel;
RECT rcSelection;
RECT rcThumb;
LPLONG tics;
} TRACKBAR_INFO;
#define TB_REFRESH_TIMER 1
#define TB_REFRESH_DELAY 500
#define TOOLTIP_OFFSET 2 /* distance from ctrl edge to tooltip */
#define TB_DEFAULTPAGESIZE 20
/* Used by TRACKBAR_Refresh to find out which parts of the control
need to be recalculated */
#define TB_THUMBPOSCHANGED 1
#define TB_THUMBSIZECHANGED 2
#define TB_THUMBCHANGED (TB_THUMBPOSCHANGED | TB_THUMBSIZECHANGED)
#define TB_SELECTIONCHANGED 4
#define TB_DRAG_MODE 8 /* we're dragging the slider */
#define TB_AUTO_PAGE_LEFT 16
#define TB_AUTO_PAGE_RIGHT 32
#define TB_AUTO_PAGE (TB_AUTO_PAGE_LEFT | TB_AUTO_PAGE_RIGHT)
#define TB_THUMB_HOT 64 /* mouse hovers above thumb */
/* helper defines for TRACKBAR_DrawTic */
#define TIC_EDGE 0x20
#define TIC_SELECTIONMARKMAX 0x80
#define TIC_SELECTIONMARKMIN 0x100
#define TIC_SELECTIONMARK (TIC_SELECTIONMARKMAX | TIC_SELECTIONMARKMIN)
static const WCHAR themeClass[] = { 'T','r','a','c','k','b','a','r',0 };
static inline int
notify_customdraw (const TRACKBAR_INFO *infoPtr, NMCUSTOMDRAW *pnmcd, int stage)
{
pnmcd->dwDrawStage = stage;
return SendMessageW (infoPtr->hwndNotify, WM_NOTIFY,
pnmcd->hdr.idFrom, (LPARAM)pnmcd);
}
static LRESULT notify_hdr (const TRACKBAR_INFO *infoPtr, INT code, LPNMHDR pnmh)
{
LRESULT result;
TRACE("(code=%d)\n", code);
pnmh->hwndFrom = infoPtr->hwndSelf;
pnmh->idFrom = GetWindowLongPtrW(infoPtr->hwndSelf, GWLP_ID);
pnmh->code = code;
result = SendMessageW(infoPtr->hwndNotify, WM_NOTIFY, pnmh->idFrom, (LPARAM)pnmh);
TRACE(" <= %ld\n", result);
return result;
}
static inline int notify (const TRACKBAR_INFO *infoPtr, INT code)
{
NMHDR nmh;
return notify_hdr(infoPtr, code, &nmh);
}
static void notify_with_scroll (const TRACKBAR_INFO *infoPtr, UINT code)
{
UINT scroll = infoPtr->dwStyle & TBS_VERT ? WM_VSCROLL : WM_HSCROLL;
TRACE("%x\n", code);
SendMessageW (infoPtr->hwndNotify, scroll, code, (LPARAM)infoPtr->hwndSelf);
}
static void TRACKBAR_RecalculateTics (TRACKBAR_INFO *infoPtr)
{
int tic;
unsigned nrTics, i;
if (infoPtr->uTicFreq && infoPtr->lRangeMax >= infoPtr->lRangeMin) {
nrTics=(infoPtr->lRangeMax - infoPtr->lRangeMin)/infoPtr->uTicFreq;
/* don't add extra tic if there's no remainder */
if (nrTics && ((infoPtr->lRangeMax - infoPtr->lRangeMin) % infoPtr->uTicFreq == 0))
nrTics--;
}
else {
Free (infoPtr->tics);
infoPtr->tics = NULL;
infoPtr->uNumTics = 0;
return;
}
if (nrTics != infoPtr->uNumTics) {
infoPtr->tics=ReAlloc (infoPtr->tics,
(nrTics+1)*sizeof (DWORD));
if (!infoPtr->tics) {
infoPtr->uNumTics = 0;
notify(infoPtr, NM_OUTOFMEMORY);
return;
}
infoPtr->uNumTics = nrTics;
}
tic = infoPtr->lRangeMin + infoPtr->uTicFreq;
for (i = 0; i < nrTics; i++, tic += infoPtr->uTicFreq)
infoPtr->tics[i] = tic;
}
/* converts from physical (mouse) position to logical position
(in range of trackbar) */
static inline LONG
TRACKBAR_ConvertPlaceToPosition (const TRACKBAR_INFO *infoPtr, int place)
{
double range, width, pos, offsetthumb;
range = infoPtr->lRangeMax - infoPtr->lRangeMin;
if (infoPtr->dwStyle & TBS_VERT) {
offsetthumb = (infoPtr->rcThumb.bottom - infoPtr->rcThumb.top)/2;
width = infoPtr->rcChannel.bottom - infoPtr->rcChannel.top - (offsetthumb * 2) - 1;
pos = (range*(place - infoPtr->rcChannel.top - offsetthumb)) / width;
} else {
offsetthumb = (infoPtr->rcThumb.right - infoPtr->rcThumb.left)/2;
width = infoPtr->rcChannel.right - infoPtr->rcChannel.left - (offsetthumb * 2) - 1;
pos = (range*(place - infoPtr->rcChannel.left - offsetthumb)) / width;
}
pos += infoPtr->lRangeMin;
if (pos > infoPtr->lRangeMax)
pos = infoPtr->lRangeMax;
else if (pos < infoPtr->lRangeMin)
pos = infoPtr->lRangeMin;
TRACE("%.2f\n", pos);
return (LONG)floor(pos + 0.5);
}
/* return: 0> prev, 0 none, >0 next */
static LONG
TRACKBAR_GetAutoPageDirection (const TRACKBAR_INFO *infoPtr, POINT clickPoint)
{
RECT pageRect;
if (infoPtr->dwStyle & TBS_VERT) {
pageRect.top = infoPtr->rcChannel.top;
pageRect.bottom = infoPtr->rcChannel.bottom;
pageRect.left = infoPtr->rcThumb.left;
pageRect.right = infoPtr->rcThumb.right;
} else {
pageRect.top = infoPtr->rcThumb.top;
pageRect.bottom = infoPtr->rcThumb.bottom;
pageRect.left = infoPtr->rcChannel.left;
pageRect.right = infoPtr->rcChannel.right;
}
if (PtInRect(&pageRect, clickPoint))
{
int clickPlace = (infoPtr->dwStyle & TBS_VERT) ? clickPoint.y : clickPoint.x;
LONG clickPos = TRACKBAR_ConvertPlaceToPosition(infoPtr, clickPlace);
return clickPos - infoPtr->lPos;
}
return 0;
}
static inline void
TRACKBAR_PageDown (TRACKBAR_INFO *infoPtr)
{
if (infoPtr->lPos == infoPtr->lRangeMax) return;
infoPtr->lPos += infoPtr->lPageSize;
if (infoPtr->lPos > infoPtr->lRangeMax)
infoPtr->lPos = infoPtr->lRangeMax;
notify_with_scroll (infoPtr, TB_PAGEDOWN);
}
static inline void
TRACKBAR_PageUp (TRACKBAR_INFO *infoPtr)
{
if (infoPtr->lPos == infoPtr->lRangeMin) return;
infoPtr->lPos -= infoPtr->lPageSize;
if (infoPtr->lPos < infoPtr->lRangeMin)
infoPtr->lPos = infoPtr->lRangeMin;
notify_with_scroll (infoPtr, TB_PAGEUP);
}
static inline void TRACKBAR_LineUp(TRACKBAR_INFO *infoPtr)
{
if (infoPtr->lPos == infoPtr->lRangeMin) return;
infoPtr->lPos -= infoPtr->lLineSize;
if (infoPtr->lPos < infoPtr->lRangeMin)
infoPtr->lPos = infoPtr->lRangeMin;
notify_with_scroll (infoPtr, TB_LINEUP);
}
static inline void TRACKBAR_LineDown(TRACKBAR_INFO *infoPtr)
{
if (infoPtr->lPos == infoPtr->lRangeMax) return;
infoPtr->lPos += infoPtr->lLineSize;
if (infoPtr->lPos > infoPtr->lRangeMax)
infoPtr->lPos = infoPtr->lRangeMax;
notify_with_scroll (infoPtr, TB_LINEDOWN);
}
static void
TRACKBAR_CalcChannel (TRACKBAR_INFO *infoPtr)
{
INT cyChannel, offsetthumb, offsetedge;
RECT lpRect, *channel = & infoPtr->rcChannel;
GetClientRect (infoPtr->hwndSelf, &lpRect);
offsetthumb = infoPtr->uThumbLen / 4;
offsetedge = offsetthumb + 3;
cyChannel = (infoPtr->dwStyle & TBS_ENABLESELRANGE) ? offsetthumb*3 : 4;
if (infoPtr->dwStyle & TBS_VERT) {
channel->top = lpRect.top + offsetedge;
channel->bottom = lpRect.bottom - offsetedge;
if (infoPtr->dwStyle & TBS_ENABLESELRANGE)
channel->left = lpRect.left + ((infoPtr->uThumbLen - cyChannel + 2) / 2);
else
channel->left = lpRect.left + (infoPtr->uThumbLen / 2) - 1;
if (infoPtr->dwStyle & TBS_BOTH) {
if (infoPtr->dwStyle & TBS_NOTICKS)
channel->left += 1;
else
channel->left += 9;
}
else if (infoPtr->dwStyle & TBS_TOP) {
if (infoPtr->dwStyle & TBS_NOTICKS)
channel->left += 2;
else
channel->left += 10;
}
channel->right = channel->left + cyChannel;
} else {
channel->left = lpRect.left + offsetedge;
channel->right = lpRect.right - offsetedge;
if (infoPtr->dwStyle & TBS_ENABLESELRANGE)
channel->top = lpRect.top + ((infoPtr->uThumbLen - cyChannel + 2) / 2);
else
channel->top = lpRect.top + (infoPtr->uThumbLen / 2) - 1;
if (infoPtr->dwStyle & TBS_BOTH) {
if (infoPtr->dwStyle & TBS_NOTICKS)
channel->top += 1;
else
channel->top += 9;
}
else if (infoPtr->dwStyle & TBS_TOP) {
if (infoPtr->dwStyle & TBS_NOTICKS)
channel->top += 2;
else
channel->top += 10;
}
channel->bottom = channel->top + cyChannel;
}
}
static void
TRACKBAR_CalcThumb (const TRACKBAR_INFO *infoPtr, LONG lPos, RECT *thumb)
{
int range, width, height, thumbwidth;
RECT lpRect;
range = infoPtr->lRangeMax - infoPtr->lRangeMin;
thumbwidth = (infoPtr->uThumbLen / 2) | 1;
if (!range) range = 1;
GetClientRect(infoPtr->hwndSelf, &lpRect);
if (infoPtr->dwStyle & TBS_VERT)
{
height = infoPtr->rcChannel.bottom - infoPtr->rcChannel.top - thumbwidth;
if ((infoPtr->dwStyle & (TBS_BOTH | TBS_LEFT)) && !(infoPtr->dwStyle & TBS_NOTICKS))
thumb->left = 10;
else
thumb->left = 2;
thumb->right = thumb->left + infoPtr->uThumbLen;
thumb->top = infoPtr->rcChannel.top +
(height*(lPos - infoPtr->lRangeMin))/range;
thumb->bottom = thumb->top + thumbwidth;
}
else
{
width = infoPtr->rcChannel.right - infoPtr->rcChannel.left - thumbwidth;
thumb->left = infoPtr->rcChannel.left +
(width*(lPos - infoPtr->lRangeMin))/range;
thumb->right = thumb->left + thumbwidth;
if ((infoPtr->dwStyle & (TBS_BOTH | TBS_TOP)) && !(infoPtr->dwStyle & TBS_NOTICKS))
thumb->top = 10;
else
thumb->top = 2;
thumb->bottom = thumb->top + infoPtr->uThumbLen;
}
}
static inline void
TRACKBAR_UpdateThumb (TRACKBAR_INFO *infoPtr)
{
TRACKBAR_CalcThumb(infoPtr, infoPtr->lPos, &infoPtr->rcThumb);
}
static inline void
TRACKBAR_InvalidateAll (const TRACKBAR_INFO *infoPtr)
{
InvalidateRect(infoPtr->hwndSelf, NULL, FALSE);
}
static void
TRACKBAR_InvalidateThumb (const TRACKBAR_INFO *infoPtr, LONG thumbPos)
{
RECT rcThumb;
TRACKBAR_CalcThumb(infoPtr, thumbPos, &rcThumb);
InflateRect(&rcThumb, 1, 1);
InvalidateRect(infoPtr->hwndSelf, &rcThumb, FALSE);
}
static inline void
TRACKBAR_InvalidateThumbMove (const TRACKBAR_INFO *infoPtr, LONG oldPos, LONG newPos)
{
TRACKBAR_InvalidateThumb (infoPtr, oldPos);
if (newPos != oldPos)
TRACKBAR_InvalidateThumb (infoPtr, newPos);
}
static inline BOOL
TRACKBAR_HasSelection (const TRACKBAR_INFO *infoPtr)
{
return infoPtr->lSelMin != infoPtr->lSelMax;
}
static void
TRACKBAR_CalcSelection (TRACKBAR_INFO *infoPtr)
{
RECT *selection = &infoPtr->rcSelection;
int range = infoPtr->lRangeMax - infoPtr->lRangeMin;
int offsetthumb, height, width;
if (range <= 0) {
SetRectEmpty (selection);
} else {
if (infoPtr->dwStyle & TBS_VERT) {
offsetthumb = (infoPtr->rcThumb.bottom - infoPtr->rcThumb.top)/2;
height = infoPtr->rcChannel.bottom - infoPtr->rcChannel.top - offsetthumb*2;
selection->top = infoPtr->rcChannel.top + offsetthumb +
(height*infoPtr->lSelMin)/range;
selection->bottom = infoPtr->rcChannel.top + offsetthumb +
(height*infoPtr->lSelMax)/range;
selection->left = infoPtr->rcChannel.left + 3;
selection->right = infoPtr->rcChannel.right - 3;
} else {
offsetthumb = (infoPtr->rcThumb.right - infoPtr->rcThumb.left)/2;
width = infoPtr->rcChannel.right - infoPtr->rcChannel.left - offsetthumb*2;
selection->left = infoPtr->rcChannel.left + offsetthumb +
(width*infoPtr->lSelMin)/range;
selection->right = infoPtr->rcChannel.left + offsetthumb +
(width*infoPtr->lSelMax)/range;
selection->top = infoPtr->rcChannel.top + 3;
selection->bottom = infoPtr->rcChannel.bottom - 3;
}
}
TRACE("selection[%s]\n", wine_dbgstr_rect(selection));
}
static BOOL
TRACKBAR_AutoPage (TRACKBAR_INFO *infoPtr, POINT clickPoint)
{
LONG dir = TRACKBAR_GetAutoPageDirection(infoPtr, clickPoint);
LONG prevPos = infoPtr->lPos;
TRACE("clickPoint=%s, dir=%d\n", wine_dbgstr_point(&clickPoint), dir);
if (dir > 0 && (infoPtr->flags & TB_AUTO_PAGE_RIGHT))
TRACKBAR_PageDown(infoPtr);
else if (dir < 0 && (infoPtr->flags & TB_AUTO_PAGE_LEFT))
TRACKBAR_PageUp(infoPtr);
else return FALSE;
TRACKBAR_UpdateThumb (infoPtr);
TRACKBAR_InvalidateThumbMove (infoPtr, prevPos, infoPtr->lPos);
return TRUE;
}
/* Trackbar drawing code. I like my spaghetti done milanese. */
static void
TRACKBAR_DrawChannel (const TRACKBAR_INFO *infoPtr, HDC hdc)
{
RECT rcChannel = infoPtr->rcChannel;
HTHEME theme = GetWindowTheme (infoPtr->hwndSelf);
if (theme)
{
DrawThemeBackground (theme, hdc,
(infoPtr->dwStyle & TBS_VERT) ?
TKP_TRACKVERT : TKP_TRACK, TKS_NORMAL, &rcChannel, 0);
}
else
{
DrawEdge (hdc, &rcChannel, EDGE_SUNKEN, BF_RECT | BF_ADJUST);
if (infoPtr->dwStyle & TBS_ENABLESELRANGE) { /* fill the channel */
FillRect (hdc, &rcChannel, GetStockObject(WHITE_BRUSH));
if (TRACKBAR_HasSelection(infoPtr))
FillRect (hdc, &infoPtr->rcSelection, GetSysColorBrush(COLOR_HIGHLIGHT));
}
}
}
static void
TRACKBAR_DrawOneTic (const TRACKBAR_INFO *infoPtr, HDC hdc, LONG ticPos, int flags)
{
int x, y, ox, oy, range, side, indent = 0, len = 3;
int offsetthumb;
RECT rcTics;
if (flags & TBS_VERT) {
offsetthumb = (infoPtr->rcThumb.bottom - infoPtr->rcThumb.top)/2;
SetRect(&rcTics, infoPtr->rcThumb.left - 2, infoPtr->rcChannel.top + offsetthumb,
infoPtr->rcThumb.right + 2, infoPtr->rcChannel.bottom - offsetthumb - 1);
} else {
offsetthumb = (infoPtr->rcThumb.right - infoPtr->rcThumb.left)/2;
SetRect(&rcTics, infoPtr->rcChannel.left + offsetthumb, infoPtr->rcThumb.top - 2,
infoPtr->rcChannel.right - offsetthumb - 1, infoPtr->rcThumb.bottom + 2);
}
if (flags & (TBS_TOP | TBS_LEFT)) {
x = rcTics.left;
y = rcTics.top;
side = -1;
} else {
x = rcTics.right;
y = rcTics.bottom;
side = 1;
}
range = infoPtr->lRangeMax - infoPtr->lRangeMin;
if (range <= 0)
range = 1; /* to avoid division by zero */
if (flags & TIC_SELECTIONMARK) {
indent = (flags & TIC_SELECTIONMARKMIN) ? -1 : 1;
} else if (flags & TIC_EDGE) {
len++;
}
if (flags & TBS_VERT) {
int height = rcTics.bottom - rcTics.top;
y = rcTics.top + (height*(ticPos - infoPtr->lRangeMin))/range;
} else {
int width = rcTics.right - rcTics.left;
x = rcTics.left + (width*(ticPos - infoPtr->lRangeMin))/range;
}
ox = x;
oy = y;
MoveToEx(hdc, x, y, 0);
if (flags & TBS_VERT) x += len * side;
else y += len * side;
LineTo(hdc, x, y);
if (flags & TIC_SELECTIONMARK) {
if (flags & TBS_VERT) {
x -= side;
} else {
y -= side;
}
MoveToEx(hdc, x, y, 0);
if (flags & TBS_VERT) {
y += 2 * indent;
} else {
x += 2 * indent;
}
LineTo(hdc, x, y);
LineTo(hdc, ox, oy);
}
}
static inline void
TRACKBAR_DrawTic (const TRACKBAR_INFO *infoPtr, HDC hdc, LONG ticPos, int flags)
{
if ((flags & (TBS_LEFT | TBS_TOP)) || (flags & TBS_BOTH))
TRACKBAR_DrawOneTic (infoPtr, hdc, ticPos, flags | TBS_LEFT);
if (!(flags & (TBS_LEFT | TBS_TOP)) || (flags & TBS_BOTH))
TRACKBAR_DrawOneTic (infoPtr, hdc, ticPos, flags & ~TBS_LEFT);
}
static void
TRACKBAR_DrawTics (const TRACKBAR_INFO *infoPtr, HDC hdc)
{
unsigned int i;
int ticFlags = infoPtr->dwStyle & 0x0f;
LOGPEN ticPen = { PS_SOLID, {1, 0}, GetSysColor (COLOR_3DDKSHADOW) };
HPEN hOldPen, hTicPen;
HTHEME theme = GetWindowTheme (infoPtr->hwndSelf);
if (theme)
{
int part = (infoPtr->dwStyle & TBS_VERT) ? TKP_TICSVERT : TKP_TICS;
GetThemeColor (theme, part, TSS_NORMAL, TMT_COLOR, &ticPen.lopnColor);
}
/* create the pen to draw the tics with */
hTicPen = CreatePenIndirect(&ticPen);
hOldPen = hTicPen ? SelectObject(hdc, hTicPen) : 0;
/* actually draw the tics */
for (i=0; i<infoPtr->uNumTics; i++)
TRACKBAR_DrawTic (infoPtr, hdc, infoPtr->tics[i], ticFlags);
TRACKBAR_DrawTic (infoPtr, hdc, infoPtr->lRangeMin, ticFlags | TIC_EDGE);
TRACKBAR_DrawTic (infoPtr, hdc, infoPtr->lRangeMax, ticFlags | TIC_EDGE);
if ((infoPtr->dwStyle & TBS_ENABLESELRANGE) && TRACKBAR_HasSelection(infoPtr)) {
TRACKBAR_DrawTic (infoPtr, hdc, infoPtr->lSelMin,
ticFlags | TIC_SELECTIONMARKMIN);
TRACKBAR_DrawTic (infoPtr, hdc, infoPtr->lSelMax,
ticFlags | TIC_SELECTIONMARKMAX);
}
/* clean up the pen, if we created one */
if (hTicPen) {
SelectObject(hdc, hOldPen);
DeleteObject(hTicPen);
}
}
static int
TRACKBAR_FillThumb (const TRACKBAR_INFO *infoPtr, HDC hdc, HBRUSH hbrush)
{
const RECT *thumb = &infoPtr->rcThumb;
POINT points[6];
int PointDepth;
HBRUSH oldbr;
if (infoPtr->dwStyle & TBS_BOTH)
{
FillRect(hdc, thumb, hbrush);
return 0;
}
if (infoPtr->dwStyle & TBS_VERT)
{
PointDepth = (thumb->bottom - thumb->top) / 2;
if (infoPtr->dwStyle & TBS_LEFT)
{
points[0].x = thumb->right-1;
points[0].y = thumb->top;
points[1].x = thumb->right-1;
points[1].y = thumb->bottom-1;
points[2].x = thumb->left + PointDepth;
points[2].y = thumb->bottom-1;
points[3].x = thumb->left;
points[3].y = thumb->top + PointDepth;
points[4].x = thumb->left + PointDepth;
points[4].y = thumb->top;
points[5].x = points[0].x;
points[5].y = points[0].y;
}
else
{
points[0].x = thumb->right;
points[0].y = thumb->top + PointDepth;
points[1].x = thumb->right - PointDepth;
points[1].y = thumb->bottom-1;
points[2].x = thumb->left;
points[2].y = thumb->bottom-1;
points[3].x = thumb->left;
points[3].y = thumb->top;
points[4].x = thumb->right - PointDepth;
points[4].y = thumb->top;
points[5].x = points[0].x;
points[5].y = points[0].y;
}
}
else
{
PointDepth = (thumb->right - thumb->left) / 2;
if (infoPtr->dwStyle & TBS_TOP)
{
points[0].x = thumb->left + PointDepth;
points[0].y = thumb->top+1;
points[1].x = thumb->right-1;
points[1].y = thumb->top + PointDepth + 1;
points[2].x = thumb->right-1;
points[2].y = thumb->bottom-1;
points[3].x = thumb->left;
points[3].y = thumb->bottom-1;
points[4].x = thumb->left;
points[4].y = thumb->top + PointDepth + 1;
points[5].x = points[0].x;
points[5].y = points[0].y;
}
else
{
points[0].x = thumb->right-1;
points[0].y = thumb->top;
points[1].x = thumb->right-1;
points[1].y = thumb->bottom - PointDepth - 1;
points[2].x = thumb->left + PointDepth;
points[2].y = thumb->bottom-1;
points[3].x = thumb->left;
points[3].y = thumb->bottom - PointDepth - 1;
points[4].x = thumb->left;
points[4].y = thumb->top;
points[5].x = points[0].x;
points[5].y = points[0].y;
}
}
oldbr = SelectObject(hdc, hbrush);
SetPolyFillMode(hdc, WINDING);
Polygon(hdc, points, sizeof(points) / sizeof(points[0]));
SelectObject(hdc, oldbr);
return PointDepth;
}
static void
TRACKBAR_DrawThumb (TRACKBAR_INFO *infoPtr, HDC hdc)
{
HTHEME theme = GetWindowTheme (infoPtr->hwndSelf);
int PointDepth;
HBRUSH brush;
if (theme)
{
int partId;
int stateId;
if (infoPtr->dwStyle & TBS_BOTH)
partId = (infoPtr->dwStyle & TBS_VERT) ? TKP_THUMBVERT : TKP_THUMB;
else if (infoPtr->dwStyle & TBS_LEFT)
partId = (infoPtr->dwStyle & TBS_VERT) ? TKP_THUMBLEFT : TKP_THUMBTOP;
else
partId = (infoPtr->dwStyle & TBS_VERT) ? TKP_THUMBRIGHT : TKP_THUMBBOTTOM;
if (infoPtr->dwStyle & WS_DISABLED)
stateId = TUS_DISABLED;
else if (infoPtr->flags & TB_DRAG_MODE)
stateId = TUS_PRESSED;
else if (infoPtr->flags & TB_THUMB_HOT)
stateId = TUS_HOT;
else
stateId = TUS_NORMAL;
DrawThemeBackground (theme, hdc, partId, stateId, &infoPtr->rcThumb, NULL);
return;
}
if (infoPtr->dwStyle & WS_DISABLED || infoPtr->flags & TB_DRAG_MODE)
{
if (comctl32_color.clr3dHilight == comctl32_color.clrWindow)
brush = COMCTL32_hPattern55AABrush;
else
brush = GetSysColorBrush(COLOR_SCROLLBAR);
SetTextColor(hdc, comctl32_color.clr3dFace);
SetBkColor(hdc, comctl32_color.clr3dHilight);
}
else
brush = GetSysColorBrush(COLOR_BTNFACE);
PointDepth = TRACKBAR_FillThumb(infoPtr, hdc, brush);
if (infoPtr->dwStyle & TBS_BOTH)
{
DrawEdge(hdc, &infoPtr->rcThumb, EDGE_RAISED, BF_RECT | BF_SOFT);
return;
}
else
{
RECT thumb = infoPtr->rcThumb;
if (infoPtr->dwStyle & TBS_VERT)
{
if (infoPtr->dwStyle & TBS_LEFT)
{
/* rectangular part */
thumb.left += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_TOP | BF_RIGHT | BF_BOTTOM | BF_SOFT);
/* light edge */
thumb.left -= PointDepth;
thumb.right = thumb.left + PointDepth;
thumb.bottom = infoPtr->rcThumb.top + PointDepth + 1;
thumb.top = infoPtr->rcThumb.top;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDTOPRIGHT | BF_SOFT);
/* shadowed edge */
thumb.top += PointDepth;
thumb.bottom += PointDepth;
DrawEdge(hdc, &thumb, EDGE_SUNKEN, BF_DIAGONAL_ENDTOPLEFT | BF_SOFT);
return;
}
else
{
/* rectangular part */
thumb.right -= PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_TOP | BF_LEFT | BF_BOTTOM | BF_SOFT);
/* light edge */
thumb.left = thumb.right;
thumb.right += PointDepth + 1;
thumb.bottom = infoPtr->rcThumb.top + PointDepth + 1;
thumb.top = infoPtr->rcThumb.top;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDTOPLEFT | BF_SOFT);
/* shadowed edge */
thumb.top += PointDepth;
thumb.bottom += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDBOTTOMLEFT | BF_SOFT);
}
}
else
{
if (infoPtr->dwStyle & TBS_TOP)
{
/* rectangular part */
thumb.top += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_LEFT | BF_BOTTOM | BF_RIGHT | BF_SOFT);
/* light edge */
thumb.left = infoPtr->rcThumb.left;
thumb.right = thumb.left + PointDepth;
thumb.bottom = infoPtr->rcThumb.top + PointDepth + 1;
thumb.top -= PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDTOPRIGHT | BF_SOFT);
/* shadowed edge */
thumb.left += PointDepth;
thumb.right += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDBOTTOMRIGHT | BF_SOFT);
}
else
{
/* rectangular part */
thumb.bottom -= PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_LEFT | BF_TOP | BF_RIGHT | BF_SOFT);
/* light edge */
thumb.left = infoPtr->rcThumb.left;
thumb.right = thumb.left + PointDepth;
thumb.top = infoPtr->rcThumb.bottom - PointDepth - 1;
thumb.bottom += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDTOPLEFT | BF_SOFT);
/* shadowed edge */
thumb.left += PointDepth;
thumb.right += PointDepth;
DrawEdge(hdc, &thumb, EDGE_RAISED, BF_DIAGONAL_ENDBOTTOMLEFT | BF_SOFT);
}
}
}
}
static inline void
TRACKBAR_ActivateToolTip (const TRACKBAR_INFO *infoPtr, BOOL fShow)
{
TTTOOLINFOW ti;
if (!infoPtr->hwndToolTip) return;
ZeroMemory(&ti, sizeof(ti));
ti.cbSize = sizeof(ti);
ti.hwnd = infoPtr->hwndSelf;
SendMessageW (infoPtr->hwndToolTip, TTM_TRACKACTIVATE, fShow, (LPARAM)&ti);
}
static void
TRACKBAR_UpdateToolTip (const TRACKBAR_INFO *infoPtr)
{
WCHAR buf[80];
static const WCHAR fmt[] = { '%', 'l', 'd', 0 };
TTTOOLINFOW ti;
POINT pt;
RECT rcClient;
LRESULT size;
if (!infoPtr->hwndToolTip) return;
ZeroMemory(&ti, sizeof(ti));
ti.cbSize = sizeof(ti);
ti.hwnd = infoPtr->hwndSelf;
ti.uFlags = TTF_IDISHWND | TTF_TRACK | TTF_ABSOLUTE;
wsprintfW (buf, fmt, infoPtr->lPos);
ti.lpszText = buf;
SendMessageW (infoPtr->hwndToolTip, TTM_UPDATETIPTEXTW, 0, (LPARAM)&ti);
GetClientRect (infoPtr->hwndSelf, &rcClient);
size = SendMessageW (infoPtr->hwndToolTip, TTM_GETBUBBLESIZE, 0, (LPARAM)&ti);
if (infoPtr->dwStyle & TBS_VERT) {
if (infoPtr->fLocation == TBTS_LEFT)
pt.x = 0 - LOWORD(size) - TOOLTIP_OFFSET;
else
pt.x = rcClient.right + TOOLTIP_OFFSET;
pt.y = (infoPtr->rcThumb.top + infoPtr->rcThumb.bottom - HIWORD(size))/2;
} else {
if (infoPtr->fLocation == TBTS_TOP)
pt.y = 0 - HIWORD(size) - TOOLTIP_OFFSET;
else
pt.y = rcClient.bottom + TOOLTIP_OFFSET;
pt.x = (infoPtr->rcThumb.left + infoPtr->rcThumb.right - LOWORD(size))/2;
}
ClientToScreen(infoPtr->hwndSelf, &pt);
SendMessageW (infoPtr->hwndToolTip, TTM_TRACKPOSITION,
0, MAKELPARAM(pt.x, pt.y));
}
static void
TRACKBAR_Refresh (TRACKBAR_INFO *infoPtr, HDC hdcDst)
{
RECT rcClient;
HDC hdc;
HBITMAP hOldBmp = 0, hOffScreenBmp = 0;
NMCUSTOMDRAW nmcd;
int gcdrf, icdrf;
if (infoPtr->flags & TB_THUMBCHANGED) {
TRACKBAR_UpdateThumb (infoPtr);
if (infoPtr->flags & TB_THUMBSIZECHANGED)
TRACKBAR_CalcChannel (infoPtr);
}
if (infoPtr->flags & TB_SELECTIONCHANGED)
TRACKBAR_CalcSelection (infoPtr);
if (infoPtr->flags & TB_DRAG_MODE)
TRACKBAR_UpdateToolTip (infoPtr);
infoPtr->flags &= ~ (TB_THUMBCHANGED | TB_SELECTIONCHANGED);
GetClientRect (infoPtr->hwndSelf, &rcClient);
/* try to render offscreen, if we fail, carrry onscreen */
hdc = CreateCompatibleDC(hdcDst);
if (hdc) {
hOffScreenBmp = CreateCompatibleBitmap(hdcDst, rcClient.right, rcClient.bottom);
if (hOffScreenBmp) {
hOldBmp = SelectObject(hdc, hOffScreenBmp);
} else {
DeleteObject(hdc);
hdc = hdcDst;
}
} else {
hdc = hdcDst;
}
ZeroMemory(&nmcd, sizeof(nmcd));
nmcd.hdr.hwndFrom = infoPtr->hwndSelf;
nmcd.hdr.idFrom = GetWindowLongPtrW (infoPtr->hwndSelf, GWLP_ID);
nmcd.hdr.code = NM_CUSTOMDRAW;
nmcd.hdc = hdc;
/* start the paint cycle */
nmcd.rc = rcClient;
gcdrf = notify_customdraw(infoPtr, &nmcd, CDDS_PREPAINT);
if (gcdrf & CDRF_SKIPDEFAULT) goto cleanup;
/* Erase background */
if (gcdrf == CDRF_DODEFAULT ||
notify_customdraw(infoPtr, &nmcd, CDDS_PREERASE) != CDRF_SKIPDEFAULT) {
if (GetWindowTheme (infoPtr->hwndSelf)) {
DrawThemeParentBackground (infoPtr->hwndSelf, hdc, 0);
}
else {
HBRUSH brush = (HBRUSH)SendMessageW(infoPtr->hwndNotify, WM_CTLCOLORSTATIC,
(WPARAM)hdc, (LPARAM)infoPtr->hwndSelf);
FillRect (hdc, &rcClient, brush ? brush : GetSysColorBrush(COLOR_BTNFACE));
}
if (gcdrf != CDRF_DODEFAULT)
notify_customdraw(infoPtr, &nmcd, CDDS_POSTERASE);
}
/* draw channel */
if (gcdrf & CDRF_NOTIFYITEMDRAW) {
nmcd.dwItemSpec = TBCD_CHANNEL;
nmcd.uItemState = CDIS_DEFAULT;
nmcd.rc = infoPtr->rcChannel;
icdrf = notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPREPAINT);
} else icdrf = CDRF_DODEFAULT;
if ( !(icdrf & CDRF_SKIPDEFAULT) ) {
TRACKBAR_DrawChannel (infoPtr, hdc);
if (icdrf & CDRF_NOTIFYPOSTPAINT)
notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPOSTPAINT);
}
/* draw tics */
if (!(infoPtr->dwStyle & TBS_NOTICKS)) {
if (gcdrf & CDRF_NOTIFYITEMDRAW) {
nmcd.dwItemSpec = TBCD_TICS;
nmcd.uItemState = CDIS_DEFAULT;
nmcd.rc = rcClient;
icdrf = notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPREPAINT);
} else icdrf = CDRF_DODEFAULT;
if ( !(icdrf & CDRF_SKIPDEFAULT) ) {
TRACKBAR_DrawTics (infoPtr, hdc);
if (icdrf & CDRF_NOTIFYPOSTPAINT)
notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPOSTPAINT);
}
}
/* draw thumb */
if (!(infoPtr->dwStyle & TBS_NOTHUMB)) {
if (gcdrf & CDRF_NOTIFYITEMDRAW) {
nmcd.dwItemSpec = TBCD_THUMB;
nmcd.uItemState = infoPtr->flags & TB_DRAG_MODE ? CDIS_HOT : CDIS_DEFAULT;
nmcd.rc = infoPtr->rcThumb;
icdrf = notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPREPAINT);
} else icdrf = CDRF_DODEFAULT;
if ( !(icdrf & CDRF_SKIPDEFAULT) ) {
TRACKBAR_DrawThumb(infoPtr, hdc);
if (icdrf & CDRF_NOTIFYPOSTPAINT)
notify_customdraw(infoPtr, &nmcd, CDDS_ITEMPOSTPAINT);
}
}
/* draw focus rectangle */
if (infoPtr->bFocussed) {
DrawFocusRect(hdc, &rcClient);
}
/* finish up the painting */
if (gcdrf & CDRF_NOTIFYPOSTPAINT)
notify_customdraw(infoPtr, &nmcd, CDDS_POSTPAINT);
cleanup:
/* cleanup, if we rendered offscreen */
if (hdc != hdcDst) {
BitBlt(hdcDst, 0, 0, rcClient.right, rcClient.bottom, hdc, 0, 0, SRCCOPY);
SelectObject(hdc, hOldBmp);
DeleteObject(hOffScreenBmp);
DeleteObject(hdc);
}
}
static void
TRACKBAR_AlignBuddies (const TRACKBAR_INFO *infoPtr)
{
HWND hwndParent = GetParent (infoPtr->hwndSelf);
RECT rcSelf, rcBuddy;
INT x, y;
GetWindowRect (infoPtr->hwndSelf, &rcSelf);
MapWindowPoints (HWND_DESKTOP, hwndParent, (LPPOINT)&rcSelf, 2);
/* align buddy left or above */
if (infoPtr->hwndBuddyLA) {
GetWindowRect (infoPtr->hwndBuddyLA, &rcBuddy);
MapWindowPoints (HWND_DESKTOP, hwndParent, (LPPOINT)&rcBuddy, 2);
if (infoPtr->dwStyle & TBS_VERT) {
x = (infoPtr->rcChannel.right + infoPtr->rcChannel.left) / 2 -
(rcBuddy.right - rcBuddy.left) / 2 + rcSelf.left;
y = rcSelf.top - (rcBuddy.bottom - rcBuddy.top);
}
else {
x = rcSelf.left - (rcBuddy.right - rcBuddy.left);
y = (infoPtr->rcChannel.bottom + infoPtr->rcChannel.top) / 2 -
(rcBuddy.bottom - rcBuddy.top) / 2 + rcSelf.top;
}
SetWindowPos (infoPtr->hwndBuddyLA, 0, x, y, 0, 0,
SWP_NOZORDER | SWP_NOSIZE);
}
/* align buddy right or below */
if (infoPtr->hwndBuddyRB) {
GetWindowRect (infoPtr->hwndBuddyRB, &rcBuddy);
MapWindowPoints (HWND_DESKTOP, hwndParent, (LPPOINT)&rcBuddy, 2);
if (infoPtr->dwStyle & TBS_VERT) {
x = (infoPtr->rcChannel.right + infoPtr->rcChannel.left) / 2 -
(rcBuddy.right - rcBuddy.left) / 2 + rcSelf.left;
y = rcSelf.bottom;
}
else {
x = rcSelf.right;
y = (infoPtr->rcChannel.bottom + infoPtr->rcChannel.top) / 2 -
(rcBuddy.bottom - rcBuddy.top) / 2 + rcSelf.top;
}
SetWindowPos (infoPtr->hwndBuddyRB, 0, x, y, 0, 0,
SWP_NOZORDER | SWP_NOSIZE);
}
}
static LRESULT
TRACKBAR_ClearSel (TRACKBAR_INFO *infoPtr, BOOL fRedraw)
{
infoPtr->lSelMin = 0;
infoPtr->lSelMax = 0;
infoPtr->flags |= TB_SELECTIONCHANGED;
if (fRedraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static LRESULT
TRACKBAR_ClearTics (TRACKBAR_INFO *infoPtr, BOOL fRedraw)
{
if (infoPtr->tics) {
Free (infoPtr->tics);
infoPtr->tics = NULL;
infoPtr->uNumTics = 0;
}
if (fRedraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_GetChannelRect (const TRACKBAR_INFO *infoPtr, LPRECT lprc)
{
if (lprc == NULL) return 0;
lprc->left = infoPtr->rcChannel.left;
lprc->right = infoPtr->rcChannel.right;
lprc->bottom = infoPtr->rcChannel.bottom;
lprc->top = infoPtr->rcChannel.top;
return 0;
}
static inline LONG
TRACKBAR_GetNumTics (const TRACKBAR_INFO *infoPtr)
{
if (infoPtr->dwStyle & TBS_NOTICKS) return 0;
return infoPtr->uNumTics + 2;
}
static int comp_tics (const void *ap, const void *bp)
{
const DWORD a = *(const DWORD *)ap;
const DWORD b = *(const DWORD *)bp;
TRACE("(a=%d, b=%d)\n", a, b);
if (a < b) return -1;
if (a > b) return 1;
return 0;
}
static inline LONG
TRACKBAR_GetTic (const TRACKBAR_INFO *infoPtr, INT iTic)
{
if ((iTic < 0) || (iTic >= infoPtr->uNumTics) || !infoPtr->tics)
return -1;
qsort(infoPtr->tics, infoPtr->uNumTics, sizeof(DWORD), comp_tics);
return infoPtr->tics[iTic];
}
static inline LONG
TRACKBAR_GetTicPos (const TRACKBAR_INFO *infoPtr, INT iTic)
{
LONG range, width, pos, tic;
int offsetthumb;
if ((iTic < 0) || (iTic >= infoPtr->uNumTics) || !infoPtr->tics)
return -1;
tic = TRACKBAR_GetTic (infoPtr, iTic);
range = infoPtr->lRangeMax - infoPtr->lRangeMin;
if (range <= 0) range = 1;
offsetthumb = (infoPtr->rcThumb.right - infoPtr->rcThumb.left)/2;
width = infoPtr->rcChannel.right - infoPtr->rcChannel.left - offsetthumb*2;
pos = infoPtr->rcChannel.left + offsetthumb + (width * tic) / range;
return pos;
}
static HWND
TRACKBAR_SetBuddy (TRACKBAR_INFO *infoPtr, BOOL fLocation, HWND hwndBuddy)
{
HWND hwndTemp;
if (fLocation) {
/* buddy is left or above */
hwndTemp = infoPtr->hwndBuddyLA;
infoPtr->hwndBuddyLA = hwndBuddy;
}
else {
/* buddy is right or below */
hwndTemp = infoPtr->hwndBuddyRB;
infoPtr->hwndBuddyRB = hwndBuddy;
}
TRACKBAR_AlignBuddies (infoPtr);
return hwndTemp;
}
static inline LONG
TRACKBAR_SetLineSize (TRACKBAR_INFO *infoPtr, LONG lLineSize)
{
LONG lTemp = infoPtr->lLineSize;
infoPtr->lLineSize = lLineSize;
return lTemp;
}
static inline LONG
TRACKBAR_SetPageSize (TRACKBAR_INFO *infoPtr, LONG lPageSize)
{
LONG lTemp = infoPtr->lPageSize;
if (lPageSize != -1)
infoPtr->lPageSize = lPageSize;
else
infoPtr->lPageSize = TB_DEFAULTPAGESIZE;
return lTemp;
}
static inline LRESULT
TRACKBAR_SetPos (TRACKBAR_INFO *infoPtr, BOOL fPosition, LONG lPosition)
{
LONG oldPos = infoPtr->lPos;
infoPtr->lPos = lPosition;
if (infoPtr->lPos < infoPtr->lRangeMin)
infoPtr->lPos = infoPtr->lRangeMin;
if (infoPtr->lPos > infoPtr->lRangeMax)
infoPtr->lPos = infoPtr->lRangeMax;
if (fPosition && oldPos != lPosition)
{
TRACKBAR_UpdateThumb(infoPtr);
TRACKBAR_InvalidateThumbMove(infoPtr, oldPos, lPosition);
}
return 0;
}
static inline LRESULT
TRACKBAR_SetRange (TRACKBAR_INFO *infoPtr, BOOL redraw, LONG range)
{
BOOL changed = infoPtr->lRangeMin != (SHORT)LOWORD(range) ||
infoPtr->lRangeMax != (SHORT)HIWORD(range);
infoPtr->lRangeMin = (SHORT)LOWORD(range);
infoPtr->lRangeMax = (SHORT)HIWORD(range);
/* clip position to new min/max limit */
if (infoPtr->lPos < infoPtr->lRangeMin)
infoPtr->lPos = infoPtr->lRangeMin;
if (infoPtr->lPos > infoPtr->lRangeMax)
infoPtr->lPos = infoPtr->lRangeMax;
infoPtr->lPageSize = (infoPtr->lRangeMax - infoPtr->lRangeMin) / 5;
if (infoPtr->lPageSize == 0) infoPtr->lPageSize = 1;
if (changed) {
if (infoPtr->dwStyle & TBS_AUTOTICKS)
TRACKBAR_RecalculateTics (infoPtr);
infoPtr->flags |= TB_THUMBPOSCHANGED;
}
if (redraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetRangeMax (TRACKBAR_INFO *infoPtr, BOOL redraw, LONG lMax)
{
BOOL changed = infoPtr->lRangeMax != lMax;
LONG rightmost = max(lMax, infoPtr->lRangeMin);
infoPtr->lRangeMax = lMax;
if (infoPtr->lPos > rightmost) {
infoPtr->lPos = rightmost;
infoPtr->flags |= TB_THUMBPOSCHANGED;
}
infoPtr->lPageSize = (infoPtr->lRangeMax - infoPtr->lRangeMin) / 5;
if (infoPtr->lPageSize == 0) infoPtr->lPageSize = 1;
if (changed && (infoPtr->dwStyle & TBS_AUTOTICKS))
TRACKBAR_RecalculateTics (infoPtr);
if (redraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetRangeMin (TRACKBAR_INFO *infoPtr, BOOL redraw, LONG lMin)
{
BOOL changed = infoPtr->lRangeMin != lMin;
infoPtr->lRangeMin = lMin;
if (infoPtr->lPos < infoPtr->lRangeMin) {
infoPtr->lPos = infoPtr->lRangeMin;
infoPtr->flags |= TB_THUMBPOSCHANGED;
}
infoPtr->lPageSize = (infoPtr->lRangeMax - infoPtr->lRangeMin) / 5;
if (infoPtr->lPageSize == 0) infoPtr->lPageSize = 1;
if (changed && (infoPtr->dwStyle & TBS_AUTOTICKS))
TRACKBAR_RecalculateTics (infoPtr);
if (redraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetSel (TRACKBAR_INFO *infoPtr, BOOL fRedraw, LONG lSel)
{
if (!(infoPtr->dwStyle & TBS_ENABLESELRANGE)){
infoPtr->lSelMin = 0;
infoPtr->lSelMax = 0;
return 0;
}
infoPtr->lSelMin = (SHORT)LOWORD(lSel);
infoPtr->lSelMax = (SHORT)HIWORD(lSel);
infoPtr->flags |= TB_SELECTIONCHANGED;
if (infoPtr->lSelMin < infoPtr->lRangeMin)
infoPtr->lSelMin = infoPtr->lRangeMin;
if (infoPtr->lSelMax > infoPtr->lRangeMax)
infoPtr->lSelMax = infoPtr->lRangeMax;
if (fRedraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetSelEnd (TRACKBAR_INFO *infoPtr, BOOL fRedraw, LONG lEnd)
{
if (!(infoPtr->dwStyle & TBS_ENABLESELRANGE)){
infoPtr->lSelMax = 0;
return 0;
}
infoPtr->lSelMax = lEnd;
infoPtr->flags |= TB_SELECTIONCHANGED;
if (infoPtr->lSelMax > infoPtr->lRangeMax)
infoPtr->lSelMax = infoPtr->lRangeMax;
if (fRedraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetSelStart (TRACKBAR_INFO *infoPtr, BOOL fRedraw, LONG lStart)
{
if (!(infoPtr->dwStyle & TBS_ENABLESELRANGE)){
infoPtr->lSelMin = 0;
return 0;
}
infoPtr->lSelMin = lStart;
infoPtr->flags |=TB_SELECTIONCHANGED;
if (infoPtr->lSelMin < infoPtr->lRangeMin)
infoPtr->lSelMin = infoPtr->lRangeMin;
if (fRedraw) TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static inline LRESULT
TRACKBAR_SetThumbLength (TRACKBAR_INFO *infoPtr, UINT iLength)
{
if (infoPtr->dwStyle & TBS_FIXEDLENGTH) {
/* We're not supposed to check if it's really changed or not,
just repaint in any case. */
infoPtr->uThumbLen = iLength;
infoPtr->flags |= TB_THUMBSIZECHANGED;
TRACKBAR_InvalidateAll(infoPtr);
}
return 0;
}
static inline LRESULT
TRACKBAR_SetTic (TRACKBAR_INFO *infoPtr, LONG lPos)
{
if ((lPos < infoPtr->lRangeMin) || (lPos> infoPtr->lRangeMax))
return FALSE;
TRACE("lPos=%d\n", lPos);
infoPtr->uNumTics++;
infoPtr->tics=ReAlloc( infoPtr->tics,
(infoPtr->uNumTics)*sizeof (DWORD));
if (!infoPtr->tics) {
infoPtr->uNumTics = 0;
notify(infoPtr, NM_OUTOFMEMORY);
return FALSE;
}
infoPtr->tics[infoPtr->uNumTics-1] = lPos;
TRACKBAR_InvalidateAll(infoPtr);
return TRUE;
}
static inline LRESULT
TRACKBAR_SetTicFreq (TRACKBAR_INFO *infoPtr, WORD wFreq)
{
if (infoPtr->dwStyle & TBS_AUTOTICKS) {
infoPtr->uTicFreq = wFreq;
TRACKBAR_RecalculateTics (infoPtr);
TRACKBAR_InvalidateAll(infoPtr);
}
TRACKBAR_UpdateThumb (infoPtr);
return 0;
}
static inline INT
TRACKBAR_SetTipSide (TRACKBAR_INFO *infoPtr, INT fLocation)
{
INT fTemp = infoPtr->fLocation;
infoPtr->fLocation = fLocation;
return fTemp;
}
static inline LRESULT
TRACKBAR_SetToolTips (TRACKBAR_INFO *infoPtr, HWND hwndTT)
{
infoPtr->hwndToolTip = hwndTT;
return 0;
}
static inline BOOL
TRACKBAR_SetUnicodeFormat (TRACKBAR_INFO *infoPtr, BOOL fUnicode)
{
BOOL bTemp = infoPtr->bUnicode;
infoPtr->bUnicode = fUnicode;
return bTemp;
}
static LRESULT
TRACKBAR_InitializeThumb (TRACKBAR_INFO *infoPtr)
{
RECT rect;
int clientWidth, clientMetric;
/* initial thumb length */
clientMetric = (infoPtr->dwStyle & TBS_ENABLESELRANGE) ? 23 : 21;
GetClientRect(infoPtr->hwndSelf,&rect);
if (infoPtr->dwStyle & TBS_VERT) {
clientWidth = rect.right - rect.left;
} else {
clientWidth = rect.bottom - rect.top;
}
if (clientWidth >= clientMetric)
infoPtr->uThumbLen = clientMetric;
else
infoPtr->uThumbLen = clientWidth > 9 ? clientWidth - 6 : 4;
TRACKBAR_CalcChannel (infoPtr);
TRACKBAR_UpdateThumb (infoPtr);
infoPtr->flags &= ~TB_SELECTIONCHANGED;
return 0;
}
static LRESULT
TRACKBAR_Create (HWND hwnd, const CREATESTRUCTW *lpcs)
{
TRACKBAR_INFO *infoPtr;
infoPtr = Alloc (sizeof(TRACKBAR_INFO));
if (!infoPtr) return -1;
SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
/* set default values */
infoPtr->hwndSelf = hwnd;
infoPtr->dwStyle = lpcs->style;
infoPtr->lRangeMin = 0;
infoPtr->lRangeMax = 100;
infoPtr->lLineSize = 1;
infoPtr->lPageSize = TB_DEFAULTPAGESIZE;
infoPtr->lSelMin = 0;
infoPtr->lSelMax = 0;
infoPtr->lPos = 0;
infoPtr->fLocation = TBTS_TOP;
infoPtr->uNumTics = 0; /* start and end tic are not included in count*/
infoPtr->uTicFreq = 1;
infoPtr->tics = NULL;
infoPtr->hwndNotify= lpcs->hwndParent;
TRACKBAR_InitializeThumb (infoPtr);
/* Create tooltip control */
if (infoPtr->dwStyle & TBS_TOOLTIPS) {
infoPtr->hwndToolTip =
CreateWindowExW (0, TOOLTIPS_CLASSW, NULL, WS_POPUP,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
hwnd, 0, 0, 0);
if (infoPtr->hwndToolTip) {
TTTOOLINFOW ti;
WCHAR wEmpty = 0;
ZeroMemory (&ti, sizeof(ti));
ti.cbSize = sizeof(ti);
ti.uFlags = TTF_IDISHWND | TTF_TRACK | TTF_ABSOLUTE;
ti.hwnd = hwnd;
ti.lpszText = &wEmpty;
SendMessageW (infoPtr->hwndToolTip, TTM_ADDTOOLW, 0, (LPARAM)&ti);
}
}
OpenThemeData (hwnd, themeClass);
return 0;
}
static LRESULT
TRACKBAR_Destroy (TRACKBAR_INFO *infoPtr)
{
/* delete tooltip control */
if (infoPtr->hwndToolTip)
DestroyWindow (infoPtr->hwndToolTip);
Free (infoPtr->tics);
infoPtr->tics = NULL;
SetWindowLongPtrW (infoPtr->hwndSelf, 0, 0);
CloseThemeData (GetWindowTheme (infoPtr->hwndSelf));
Free (infoPtr);
return 0;
}
static LRESULT
TRACKBAR_KillFocus (TRACKBAR_INFO *infoPtr)
{
TRACE("\n");
infoPtr->bFocussed = FALSE;
TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static LRESULT
TRACKBAR_LButtonDown (TRACKBAR_INFO *infoPtr, INT x, INT y)
{
POINT clickPoint;
clickPoint.x = x;
clickPoint.y = y;
SetFocus(infoPtr->hwndSelf);
if (PtInRect(&infoPtr->rcThumb, clickPoint)) {
infoPtr->flags |= TB_DRAG_MODE;
SetCapture (infoPtr->hwndSelf);
TRACKBAR_UpdateToolTip (infoPtr);
TRACKBAR_ActivateToolTip (infoPtr, TRUE);
TRACKBAR_InvalidateThumb(infoPtr, infoPtr->lPos);
} else {
LONG dir = TRACKBAR_GetAutoPageDirection(infoPtr, clickPoint);
if (dir == 0) return 0;
infoPtr->flags |= (dir < 0) ? TB_AUTO_PAGE_LEFT : TB_AUTO_PAGE_RIGHT;
TRACKBAR_AutoPage (infoPtr, clickPoint);
SetCapture (infoPtr->hwndSelf);
SetTimer(infoPtr->hwndSelf, TB_REFRESH_TIMER, TB_REFRESH_DELAY, 0);
}
return 0;
}
static LRESULT
TRACKBAR_LButtonUp (TRACKBAR_INFO *infoPtr)
{
if (infoPtr->flags & TB_DRAG_MODE) {
notify_with_scroll (infoPtr, TB_THUMBPOSITION | (infoPtr->lPos<<16));
notify_with_scroll (infoPtr, TB_ENDTRACK);
infoPtr->flags &= ~TB_DRAG_MODE;
ReleaseCapture ();
notify(infoPtr, NM_RELEASEDCAPTURE);
TRACKBAR_ActivateToolTip(infoPtr, FALSE);
TRACKBAR_InvalidateThumb(infoPtr, infoPtr->lPos);
}
if (infoPtr->flags & TB_AUTO_PAGE) {
KillTimer (infoPtr->hwndSelf, TB_REFRESH_TIMER);
infoPtr->flags &= ~TB_AUTO_PAGE;
notify_with_scroll (infoPtr, TB_ENDTRACK);
ReleaseCapture ();
notify(infoPtr, NM_RELEASEDCAPTURE);
}
return 0;
}
static LRESULT
TRACKBAR_CaptureChanged (const TRACKBAR_INFO *infoPtr)
{
notify_with_scroll (infoPtr, TB_ENDTRACK);
return 0;
}
static LRESULT
TRACKBAR_Paint (TRACKBAR_INFO *infoPtr, HDC hdc)
{
if (hdc) {
TRACKBAR_Refresh(infoPtr, hdc);
} else {
PAINTSTRUCT ps;
hdc = BeginPaint (infoPtr->hwndSelf, &ps);
TRACKBAR_Refresh (infoPtr, hdc);
EndPaint (infoPtr->hwndSelf, &ps);
}
return 0;
}
static LRESULT
TRACKBAR_SetFocus (TRACKBAR_INFO *infoPtr)
{
TRACE("\n");
infoPtr->bFocussed = TRUE;
TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static LRESULT
TRACKBAR_Size (TRACKBAR_INFO *infoPtr)
{
if (infoPtr->dwStyle & TBS_FIXEDLENGTH)
{
TRACKBAR_CalcChannel(infoPtr);
TRACKBAR_UpdateThumb(infoPtr);
}
else
TRACKBAR_InitializeThumb(infoPtr);
TRACKBAR_AlignBuddies (infoPtr);
TRACKBAR_InvalidateAll(infoPtr);
return 0;
}
static LRESULT
TRACKBAR_StyleChanged (TRACKBAR_INFO *infoPtr, WPARAM wStyleType,
const STYLESTRUCT *lpss)
{
if (wStyleType != GWL_STYLE) return 0;
infoPtr->dwStyle = lpss->styleNew;
return 0;
}
static LRESULT
TRACKBAR_Timer (TRACKBAR_INFO *infoPtr)
{
if (infoPtr->flags & TB_AUTO_PAGE) {
POINT pt;
if (GetCursorPos(&pt))
if (ScreenToClient(infoPtr->hwndSelf, &pt))
TRACKBAR_AutoPage(infoPtr, pt);
}
return 0;
}
/* update theme after a WM_THEMECHANGED message */
static LRESULT theme_changed (const TRACKBAR_INFO* infoPtr)
{
HTHEME theme = GetWindowTheme (infoPtr->hwndSelf);
CloseThemeData (theme);
OpenThemeData (infoPtr->hwndSelf, themeClass);
return 0;
}
static LRESULT
TRACKBAR_MouseMove (TRACKBAR_INFO *infoPtr, INT x, INT y)
{
INT clickPlace = (infoPtr->dwStyle & TBS_VERT) ? y : x;
LONG dragPos, oldPos = infoPtr->lPos;
TRACE("(x=%d. y=%d)\n", x, y);
if (infoPtr->flags & TB_AUTO_PAGE) {
POINT pt;
pt.x = x;
pt.y = y;
TRACKBAR_AutoPage (infoPtr, pt);
return TRUE;
}
if (!(infoPtr->flags & TB_DRAG_MODE))
{
if (GetWindowTheme (infoPtr->hwndSelf))
{
DWORD oldFlags = infoPtr->flags;
POINT pt;
pt.x = x;
pt.y = y;
if (PtInRect (&infoPtr->rcThumb, pt))
{
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof( tme );
tme.dwFlags = TME_LEAVE;
tme.hwndTrack = infoPtr->hwndSelf;
TrackMouseEvent( &tme );
infoPtr->flags |= TB_THUMB_HOT;
}
else
{
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof( tme );
tme.dwFlags = TME_CANCEL;
tme.hwndTrack = infoPtr->hwndSelf;
TrackMouseEvent( &tme );
infoPtr->flags &= ~TB_THUMB_HOT;
}
if (oldFlags != infoPtr->flags) InvalidateRect (infoPtr->hwndSelf, &infoPtr->rcThumb, FALSE);
}
return TRUE;
}
dragPos = TRACKBAR_ConvertPlaceToPosition (infoPtr, clickPlace);
if (dragPos == oldPos) return TRUE;
infoPtr->lPos = dragPos;
TRACKBAR_UpdateThumb (infoPtr);
notify_with_scroll (infoPtr, TB_THUMBTRACK | (infoPtr->lPos<<16));
TRACKBAR_InvalidateThumbMove(infoPtr, oldPos, dragPos);
UpdateWindow (infoPtr->hwndSelf);
return TRUE;
}
static BOOL
TRACKBAR_KeyDown (TRACKBAR_INFO *infoPtr, INT nVirtKey)
{
BOOL downIsLeft = infoPtr->dwStyle & TBS_DOWNISLEFT;
BOOL vert = infoPtr->dwStyle & TBS_VERT;
LONG pos = infoPtr->lPos;
TRACE("%x\n", nVirtKey);
switch (nVirtKey) {
case VK_UP:
if (!vert && downIsLeft) TRACKBAR_LineDown(infoPtr);
else TRACKBAR_LineUp(infoPtr);
break;
case VK_LEFT:
if (vert && downIsLeft) TRACKBAR_LineDown(infoPtr);
else TRACKBAR_LineUp(infoPtr);
break;
case VK_DOWN:
if (!vert && downIsLeft) TRACKBAR_LineUp(infoPtr);
else TRACKBAR_LineDown(infoPtr);
break;
case VK_RIGHT:
if (vert && downIsLeft) TRACKBAR_LineUp(infoPtr);
else TRACKBAR_LineDown(infoPtr);
break;
case VK_NEXT:
if (!vert && downIsLeft) TRACKBAR_PageUp(infoPtr);
else TRACKBAR_PageDown(infoPtr);
break;
case VK_PRIOR:
if (!vert && downIsLeft) TRACKBAR_PageDown(infoPtr);
else TRACKBAR_PageUp(infoPtr);
break;
case VK_HOME:
if (infoPtr->lPos == infoPtr->lRangeMin) return FALSE;
infoPtr->lPos = infoPtr->lRangeMin;
notify_with_scroll (infoPtr, TB_TOP);
break;
case VK_END:
if (infoPtr->lPos == infoPtr->lRangeMax) return FALSE;
infoPtr->lPos = infoPtr->lRangeMax;
notify_with_scroll (infoPtr, TB_BOTTOM);
break;
}
if (pos != infoPtr->lPos) {
TRACKBAR_UpdateThumb (infoPtr);
TRACKBAR_InvalidateThumbMove (infoPtr, pos, infoPtr->lPos);
}
return TRUE;
}
static inline BOOL
TRACKBAR_KeyUp (const TRACKBAR_INFO *infoPtr, INT nVirtKey)
{
switch (nVirtKey) {
case VK_LEFT:
case VK_UP:
case VK_RIGHT:
case VK_DOWN:
case VK_NEXT:
case VK_PRIOR:
case VK_HOME:
case VK_END:
notify_with_scroll (infoPtr, TB_ENDTRACK);
}
return TRUE;
}
static LRESULT
TRACKBAR_Enable (TRACKBAR_INFO *infoPtr, BOOL enable)
{
if (enable)
infoPtr->dwStyle &= ~WS_DISABLED;
else
infoPtr->dwStyle |= WS_DISABLED;
InvalidateRect(infoPtr->hwndSelf, &infoPtr->rcThumb, TRUE);
return 1;
}
static LRESULT WINAPI
TRACKBAR_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
TRACKBAR_INFO *infoPtr = (TRACKBAR_INFO *)GetWindowLongPtrW (hwnd, 0);
TRACE("hwnd=%p msg=%x wparam=%lx lparam=%lx\n", hwnd, uMsg, wParam, lParam);
if (!infoPtr && (uMsg != WM_CREATE))
return DefWindowProcW (hwnd, uMsg, wParam, lParam);
switch (uMsg)
{
case TBM_CLEARSEL:
return TRACKBAR_ClearSel (infoPtr, (BOOL)wParam);
case TBM_CLEARTICS:
return TRACKBAR_ClearTics (infoPtr, (BOOL)wParam);
case TBM_GETBUDDY:
return (LRESULT)(wParam ? infoPtr->hwndBuddyLA : infoPtr->hwndBuddyRB);
case TBM_GETCHANNELRECT:
return TRACKBAR_GetChannelRect (infoPtr, (LPRECT)lParam);
case TBM_GETLINESIZE:
return infoPtr->lLineSize;
case TBM_GETNUMTICS:
return TRACKBAR_GetNumTics (infoPtr);
case TBM_GETPAGESIZE:
return infoPtr->lPageSize;
case TBM_GETPOS:
return infoPtr->lPos;
case TBM_GETPTICS:
return (LRESULT)infoPtr->tics;
case TBM_GETRANGEMAX:
return infoPtr->lRangeMax;
case TBM_GETRANGEMIN:
return infoPtr->lRangeMin;
case TBM_GETSELEND:
return infoPtr->lSelMax;
case TBM_GETSELSTART:
return infoPtr->lSelMin;
case TBM_GETTHUMBLENGTH:
return infoPtr->uThumbLen;
case TBM_GETTHUMBRECT:
return CopyRect((LPRECT)lParam, &infoPtr->rcThumb);
case TBM_GETTIC:
return TRACKBAR_GetTic (infoPtr, (INT)wParam);
case TBM_GETTICPOS:
return TRACKBAR_GetTicPos (infoPtr, (INT)wParam);
case TBM_GETTOOLTIPS:
return (LRESULT)infoPtr->hwndToolTip;
case TBM_GETUNICODEFORMAT:
return infoPtr->bUnicode;
case TBM_SETBUDDY:
return (LRESULT) TRACKBAR_SetBuddy(infoPtr, (BOOL)wParam, (HWND)lParam);
case TBM_SETLINESIZE:
return TRACKBAR_SetLineSize (infoPtr, (LONG)lParam);
case TBM_SETPAGESIZE:
return TRACKBAR_SetPageSize (infoPtr, (LONG)lParam);
case TBM_SETPOS:
return TRACKBAR_SetPos (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETRANGE:
return TRACKBAR_SetRange (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETRANGEMAX:
return TRACKBAR_SetRangeMax (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETRANGEMIN:
return TRACKBAR_SetRangeMin (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETSEL:
return TRACKBAR_SetSel (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETSELEND:
return TRACKBAR_SetSelEnd (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETSELSTART:
return TRACKBAR_SetSelStart (infoPtr, (BOOL)wParam, (LONG)lParam);
case TBM_SETTHUMBLENGTH:
return TRACKBAR_SetThumbLength (infoPtr, (UINT)wParam);
case TBM_SETTIC:
return TRACKBAR_SetTic (infoPtr, (LONG)lParam);
case TBM_SETTICFREQ:
return TRACKBAR_SetTicFreq (infoPtr, (WORD)wParam);
case TBM_SETTIPSIDE:
return TRACKBAR_SetTipSide (infoPtr, (INT)wParam);
case TBM_SETTOOLTIPS:
return TRACKBAR_SetToolTips (infoPtr, (HWND)wParam);
case TBM_SETUNICODEFORMAT:
return TRACKBAR_SetUnicodeFormat (infoPtr, (BOOL)wParam);
case WM_CAPTURECHANGED:
if (hwnd == (HWND)lParam) return 0;
return TRACKBAR_CaptureChanged (infoPtr);
case WM_CREATE:
return TRACKBAR_Create (hwnd, (LPCREATESTRUCTW)lParam);
case WM_DESTROY:
return TRACKBAR_Destroy (infoPtr);
case WM_ENABLE:
return TRACKBAR_Enable (infoPtr, (BOOL)wParam);
case WM_ERASEBKGND:
return 0;
case WM_GETDLGCODE:
return DLGC_WANTARROWS;
case WM_KEYDOWN:
return TRACKBAR_KeyDown (infoPtr, (INT)wParam);
case WM_KEYUP:
return TRACKBAR_KeyUp (infoPtr, (INT)wParam);
case WM_KILLFOCUS:
return TRACKBAR_KillFocus (infoPtr);
case WM_LBUTTONDOWN:
return TRACKBAR_LButtonDown (infoPtr, (SHORT)LOWORD(lParam), (SHORT)HIWORD(lParam));
case WM_LBUTTONUP:
return TRACKBAR_LButtonUp (infoPtr);
case WM_MOUSELEAVE:
infoPtr->flags &= ~TB_THUMB_HOT;
InvalidateRect (infoPtr->hwndSelf, &infoPtr->rcThumb, FALSE);
return 0;
case WM_MOUSEMOVE:
return TRACKBAR_MouseMove (infoPtr, (SHORT)LOWORD(lParam), (SHORT)HIWORD(lParam));
case WM_PRINTCLIENT:
case WM_PAINT:
return TRACKBAR_Paint (infoPtr, (HDC)wParam);
case WM_SETFOCUS:
return TRACKBAR_SetFocus (infoPtr);
case WM_SIZE:
return TRACKBAR_Size (infoPtr);
case WM_STYLECHANGED:
return TRACKBAR_StyleChanged (infoPtr, wParam, (LPSTYLESTRUCT)lParam);
case WM_THEMECHANGED:
return theme_changed (infoPtr);
case WM_TIMER:
return TRACKBAR_Timer (infoPtr);
case WM_WININICHANGE:
return TRACKBAR_InitializeThumb (infoPtr);
default:
if ((uMsg >= WM_USER) && (uMsg < WM_APP) && !COMCTL32_IsReflectedMessage(uMsg))
ERR("unknown msg %04x wp=%08lx lp=%08lx\n", uMsg, wParam, lParam);
return DefWindowProcW (hwnd, uMsg, wParam, lParam);
}
}
void TRACKBAR_Register (void)
{
WNDCLASSW wndClass;
ZeroMemory (&wndClass, sizeof(WNDCLASSW));
wndClass.style = CS_GLOBALCLASS;
wndClass.lpfnWndProc = TRACKBAR_WindowProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = sizeof(TRACKBAR_INFO *);
wndClass.hCursor = LoadCursorW (0, (LPWSTR)IDC_ARROW);
wndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
wndClass.lpszClassName = TRACKBAR_CLASSW;
RegisterClassW (&wndClass);
}
void TRACKBAR_Unregister (void)
{
UnregisterClassW (TRACKBAR_CLASSW, NULL);
}