Newer
Older
* Interface code to SCROLLBAR widget
*
* Copyright Martin Ayotte, 1993
* Small fixes and implemented SB_THUMBPOSITION
* by Peter Broadhurst, 940611
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
static HBITMAP hUpArrow = 0;
static HBITMAP hDnArrow = 0;
static HBITMAP hLfArrow = 0;
static HBITMAP hRgArrow = 0;
static HBITMAP hUpArrowD = 0;
static HBITMAP hDnArrowD = 0;
static HBITMAP hLfArrowD = 0;
static HBITMAP hRgArrowD = 0;
static HBITMAP hUpArrowI = 0;
static HBITMAP hDnArrowI = 0;
static HBITMAP hLfArrowI = 0;
static HBITMAP hRgArrowI = 0;
#define TOP_ARROW(flags,pressed) \
(((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
#define BOTTOM_ARROW(flags,pressed) \
(((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
#define LEFT_ARROW(flags,pressed) \
(((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
#define RIGHT_ARROW(flags,pressed) \
(((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
/* Minimum size of the rectangle between the arrows */
#define SCROLL_MIN_RECT 4
/* Delay (in ms) before first repetition when holding the button down */
#define SCROLL_FIRST_DELAY 200
/* Delay (in ms) between scroll repetitions */
#define SCROLL_REPEAT_DELAY 100
/* Scroll timer id */
#define SCROLL_TIMER 0
/* Scroll-bar hit testing */
enum SCROLL_HITTEST
{
SCROLL_NOWHERE, /* Outside the scroll bar */
SCROLL_TOP_ARROW, /* Top or left arrow */
SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
SCROLL_THUMB, /* Thumb rectangle */
SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
};
/* Thumb-tracking info */
static HWND hwndTracking = 0;
static int nBarTracking = 0;
static UINT uTrackingPos = 0;
/***********************************************************************
hUpArrow = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROW));
hDnArrow = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROW));
hLfArrow = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROW));
hRgArrow = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROW));
hUpArrowD = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWD));
hDnArrowD = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWD));
hLfArrowD = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWD));
hRgArrowD = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWD));
hUpArrowI = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWI));
hDnArrowI = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWI));
hLfArrowI = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWI));
hRgArrowI = LoadBitmap16((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWI));
/***********************************************************************
static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, int nBar )
case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
if (!infoPtr) /* Create the info structure if needed */
if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
{
infoPtr->MinVal = infoPtr->CurVal = 0;
infoPtr->MaxVal = 100;
infoPtr->flags = ESB_ENABLE_BOTH;
if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
else wndPtr->pVScroll = infoPtr;
/***********************************************************************
* SCROLL_GetScrollInfo
*/
static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, int nBar )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
}
/***********************************************************************
* SCROLL_GetScrollBarRect
*
* Compute the scroll bar rectangle, in drawing coordinates (i.e. client
* coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
* 'arrowSize' returns the width or height of an arrow (depending on the
* orientation of the scrollbar), and 'thumbPos' returns the position of
* the thumb relative to the left or to the top.
* Return TRUE if the scrollbar is vertical, FALSE if horizontal.
*/
static BOOL SCROLL_GetScrollBarRect( HWND hwnd, int nBar, RECT16 *lprect,
int pixels;
BOOL vertical;
WND *wndPtr = WIN_FindWndPtr( hwnd );
switch(nBar)
{
case SB_HORZ:
lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - 1;
lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left +1;
lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL + 1;
vertical = FALSE;
break;
case SB_VERT:
lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top - 1;
lprect->right = lprect->left + SYSMETRICS_CXVSCROLL + 1;
lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top +1;
vertical = TRUE;
break;
case SB_CTL:
vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
break;
}
if (vertical) pixels = lprect->bottom - lprect->top;
else pixels = lprect->right - lprect->left;
if (pixels > 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
{
*arrowSize = SYSMETRICS_CXVSCROLL;
}
else if (pixels > SCROLL_MIN_RECT)
{
*arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
}
else *arrowSize = 0;
if ((pixels -= 3*SYSMETRICS_CXVSCROLL+1) > 0)
{
SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
if ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
*thumbPos = 0;
else if (info->MinVal == info->MaxVal)
*thumbPos = *arrowSize;
else
*thumbPos = *arrowSize + pixels * (info->CurVal - info->MinVal) /
(info->MaxVal - info->MinVal);
}
else *thumbPos = 0;
return vertical;
/***********************************************************************
* SCROLL_GetThumbVal
*
* Compute the current scroll position based on the thumb position in pixels
* from the top of the scroll-bar.
*/
static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT16 *rect,
int pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
if ((pixels -= 3*SYSMETRICS_CXVSCROLL+1) <= 0) return infoPtr->MinVal;
if (pos > pixels) pos = pixels;
dprintf_scroll(stddeb,"GetThumbVal: pos=%d ret=%d\n", pos,
(infoPtr->MinVal
+ (UINT)(((int)pos * (infoPtr->MaxVal-infoPtr->MinVal) + pixels/2)
/ pixels)) );
return (infoPtr->MinVal
+ (UINT)(((int)pos * (infoPtr->MaxVal-infoPtr->MinVal) + pixels/2)
/ pixels));
/***********************************************************************
* SCROLL_HitTest
*
* Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
*/
static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, int nBar, POINT16 pt )
BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
if (!PtInRect16( &rect, pt )) return SCROLL_NOWHERE;
if (vertical)
{
if (pt.y <= rect.top + arrowSize + 1) return SCROLL_TOP_ARROW;
if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
if (!thumbPos) return SCROLL_TOP_RECT;
pt.y -= rect.top;
if (pt.y < (INT)thumbPos) return SCROLL_TOP_RECT;
if (pt.y > thumbPos+SYSMETRICS_CYHSCROLL) return SCROLL_BOTTOM_RECT;
return SCROLL_THUMB;
}
else /* horizontal */
{
if (pt.x <= rect.left + arrowSize) return SCROLL_TOP_ARROW;
if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
if (!thumbPos) return SCROLL_TOP_RECT;
pt.x -= rect.left;
if (pt.x < (INT)thumbPos) return SCROLL_TOP_RECT;
if (pt.x > thumbPos+SYSMETRICS_CXVSCROLL) return SCROLL_BOTTOM_RECT;
return SCROLL_THUMB;
}
/***********************************************************************
* SCROLL_DrawArrows
*
* Draw the scroll bar arrows.
*/
static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr, RECT16 *rect,
WORD arrowSize, BOOL vertical,
BOOL top_pressed, BOOL bottom_pressed )
HDC hdcMem = CreateCompatibleDC( hdc );
HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
TOP_ARROW(infoPtr->flags, top_pressed)
: LEFT_ARROW(infoPtr->flags, top_pressed));
StretchBlt( hdc, rect->left, rect->top,
vertical ? rect->right-rect->left : arrowSize+1,
vertical ? arrowSize+1 : rect->bottom-rect->top,
hdcMem, 0, 0,
SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
SRCCOPY );
SelectObject( hdcMem, vertical ?
BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
: RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
if (vertical)
StretchBlt( hdc, rect->left, rect->bottom - arrowSize - 1,
rect->right - rect->left, arrowSize + 1,
hdcMem, 0, 0,
SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
SRCCOPY );
else
StretchBlt( hdc, rect->right - arrowSize - 1, rect->top,
arrowSize + 1, rect->bottom - rect->top,
hdcMem, 0, 0,
SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
SRCCOPY );
SelectObject( hdcMem, hbmpPrev );
DeleteDC( hdcMem );
/***********************************************************************
* SCROLL_DrawMovingThumb
*
* Draw the moving thumb rectangle.
*/
static void SCROLL_DrawMovingThumb( HDC hdc, RECT16 *rect, BOOL vertical,
if (vertical)
{
r.top += thumbPos;
if (r.top < rect->top + arrowSize) r.top = rect->top + arrowSize;
if (r.top + SYSMETRICS_CYHSCROLL >= rect->bottom - arrowSize)
r.top = rect->bottom - arrowSize - SYSMETRICS_CYHSCROLL - 1;
r.bottom = r.top + SYSMETRICS_CYHSCROLL + 1;
}
else
{
r.left += thumbPos;
if (r.left < rect->left + arrowSize) r.left = rect->left + arrowSize;
if (r.left + SYSMETRICS_CXVSCROLL >= rect->right - arrowSize)
r.left = rect->right - arrowSize - SYSMETRICS_CXVSCROLL - 1;
r.right = r.left + SYSMETRICS_CXVSCROLL + 1;
}
InflateRect16( &r, -1, -1 );
DrawFocusRect16( hdc, &r );
/***********************************************************************
* SCROLL_DrawInterior
*
* Draw the scroll bar interior (everything except the arrows).
*/
static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, int nBar, RECT16 *rect,
WORD arrowSize, WORD thumbPos, WORD flags,
BOOL vertical, BOOL top_selected,
BOOL bottom_selected )
/* Select the correct brush and pen */
SelectObject( hdc, sysColorObjects.hpenWindowFrame );
if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
{
/* This ought to be the color of the parent window */
SelectObject( hdc, sysColorObjects.hbrushWindow );
}
{
if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
{
SelectObject( hdc, hbrush );
}
else SelectObject( hdc, sysColorObjects.hbrushScrollbar );
}
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
/* Calculate the scroll rectangle */
r = *rect;
if (vertical)
{
r.top += arrowSize;
r.bottom -= arrowSize;
}
else
{
r.left += arrowSize;
r.right -= arrowSize;
}
/* Draw the scroll bar frame */
MoveTo( hdc, r.left, r.top );
LineTo( hdc, r.right-1, r.top );
LineTo( hdc, r.right-1, r.bottom-1 );
LineTo( hdc, r.left, r.bottom-1 );
LineTo( hdc, r.left, r.top );
/* Draw the scroll rectangles and thumb */
if (!thumbPos) /* No thumb to draw */
{
PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
return;
}
if (vertical)
{
PatBlt( hdc, r.left + 1, r.top + 1,
r.right - r.left - 2,
thumbPos - arrowSize,
r.top += thumbPos - arrowSize;
PatBlt( hdc, r.left + 1, r.top + SYSMETRICS_CYHSCROLL + 1,
r.right - r.left - 2,
r.bottom - r.top - SYSMETRICS_CYHSCROLL - 2,
r.bottom = r.top + SYSMETRICS_CYHSCROLL + 1;
}
else /* horizontal */
{
PatBlt( hdc, r.left + 1, r.top + 1,
thumbPos - arrowSize,
r.bottom - r.top - 2,
r.left += thumbPos - arrowSize;
PatBlt( hdc, r.left + SYSMETRICS_CYHSCROLL + 1, r.top + 1,
r.right - r.left - SYSMETRICS_CYHSCROLL - 2,
r.bottom - r.top - 2,
r.right = r.left + SYSMETRICS_CXVSCROLL + 1;
}
/* Draw the thumb */
SelectObject( hdc, sysColorObjects.hbrushBtnFace );
Rectangle( hdc, r.left, r.top, r.right, r.bottom );
if ((hwndTracking == hwnd) && (nBarTracking == nBar))
SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, uTrackingPos);
/***********************************************************************
* SCROLL_DrawScrollBar
*
* Redraw the whole scrollbar.
*/
void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, int nBar )
SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
if (!wndPtr || !infoPtr ||
((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
/* Draw the arrows */
if (arrowSize) SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize,
vertical, FALSE, FALSE );
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical, FALSE, FALSE );
/***********************************************************************
* SCROLL_RefreshScrollBar
*
* Repaint the scroll bar interior after a SetScrollRange() or
* SetScrollPos() call.
*/
static void SCROLL_RefreshScrollBar( HWND hwnd, int nBar )
SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
if (!wndPtr || !infoPtr ||
((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
if (!hdc) return;
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical, FALSE, FALSE );
ReleaseDC( hwnd, hdc );
/***********************************************************************
* SCROLL_HandleKbdEvent
*
* Handle a keyboard event (only for SB_CTL scrollbars).
static void SCROLL_HandleKbdEvent( HWND hwnd, WORD wParam )
switch(wParam)
{
case VK_PRIOR: msg = SB_PAGEUP; break;
case VK_NEXT: msg = SB_PAGEDOWN; break;
case VK_HOME: msg = SB_TOP; break;
case VK_END: msg = SB_BOTTOM; break;
case VK_UP: msg = SB_LINEUP; break;
case VK_DOWN: msg = SB_LINEDOWN; break;
default:
return;
}
(wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
msg, hwnd );
/***********************************************************************
* SCROLL_HandleScrollEvent
*
* Handle a mouse or timer event for the scrollbar.
* 'pt' is the location of the mouse event in client (for SB_CTL) or
* windows coordinates.
void SCROLL_HandleScrollEvent( HWND hwnd, int nBar, WORD msg, POINT16 pt )
/* Hit test code of the last button-down event */
static enum SCROLL_HITTEST trackHitTest;
/* Thumb position when tracking started. */
static UINT trackThumbPos;
/* Position in the scroll-bar of the last button-down event. */
static int lastClickPos;
/* Position in the scroll-bar of the last mouse event. */
static int lastMousePos;
enum SCROLL_HITTEST hittest;
HWND hwndOwner, hwndCtl;
BOOL vertical;
WORD arrowSize, thumbPos;
SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
if (!infoPtr) return;
if ((trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN)) return;
hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
hwndOwner = (nBar == SB_CTL) ? GetParent32(hwnd) : hwnd;
hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
switch(msg)
{
case WM_LBUTTONDOWN: /* Initialise mouse tracking */
trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt );
lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
lastMousePos = lastClickPos;
trackThumbPos = thumbPos;
prevPt = pt;
SetCapture( hwnd );
break;
case WM_MOUSEMOVE:
hittest = SCROLL_HitTest( hwnd, nBar, pt );
prevPt = pt;
break;
case WM_LBUTTONUP:
hittest = SCROLL_NOWHERE;
ReleaseCapture();
break;
case WM_SYSTIMER:
pt = prevPt;
hittest = SCROLL_HitTest( hwnd, nBar, pt );
break;
default:
return; /* Should never happen */
}
dprintf_scroll( stddeb, "ScrollBar Event: hwnd=%04x bar=%d msg=%x pt=%d,%d hit=%d\n",
hwnd, nBar, msg, pt.x, pt.y, hittest );
switch(trackHitTest)
{
case SCROLL_NOWHERE: /* No tracking in progress */
break;
case SCROLL_TOP_ARROW:
SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
(hittest == trackHitTest), FALSE );
if (hittest == trackHitTest)
{
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEUP, hwndCtl );
SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC32)0 );
break;
case SCROLL_TOP_RECT:
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical,
(hittest == trackHitTest), FALSE );
if (hittest == trackHitTest)
{
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEUP, hwndCtl );
SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC32)0 );
break;
case SCROLL_THUMB:
if (msg == WM_LBUTTONDOWN)
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical, FALSE, FALSE );
else /* WM_MOUSEMOVE */
{
UINT pos, val;
else pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
if (pos != lastMousePos)
{
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
lastMousePos = pos;
/* Save tracking info */
uTrackingPos = trackThumbPos + pos - lastClickPos;
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SCROLL_DrawMovingThumb( hdc, &rect, vertical,
arrowSize, uTrackingPos );
break;
case SCROLL_BOTTOM_RECT:
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical,
FALSE, (hittest == trackHitTest) );
if (hittest == trackHitTest)
{
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEDOWN, hwndCtl );
SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC32)0 );
break;
case SCROLL_BOTTOM_ARROW:
SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
FALSE, (hittest == trackHitTest) );
if (hittest == trackHitTest)
{
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEDOWN, hwndCtl );
SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC32)0 );
break;
}
if (msg == WM_LBUTTONUP)
{
if (trackHitTest == SCROLL_THUMB)
{
UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
}
ReleaseDC( hwnd, hdc );
/***********************************************************************
* ScrollBarWndProc
*/
LONG ScrollBarWndProc( HWND hwnd, WORD message, WORD wParam, LONG lParam )
CREATESTRUCT16 *lpCreat = (CREATESTRUCT16 *)PTR_SEG_TO_LIN(lParam);
if (lpCreat->style & SBS_SIZEBOX)
{
fprintf( stdnimp, "Unimplemented style SBS_SIZEBOX.\n" );
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
}
if (lpCreat->style & SBS_VERT)
{
if (lpCreat->style & SBS_LEFTALIGN)
MoveWindow( hwnd, lpCreat->x, lpCreat->y,
SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
else if (lpCreat->style & SBS_RIGHTALIGN)
MoveWindow( hwnd,
lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
lpCreat->y,
SYSMETRICS_CXVSCROLL + 1, lpCreat->cy, FALSE );
}
else /* SBS_HORZ */
{
if (lpCreat->style & SBS_TOPALIGN)
MoveWindow( hwnd, lpCreat->x, lpCreat->y,
lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
else if (lpCreat->style & SBS_BOTTOMALIGN)
MoveWindow( hwnd,
lpCreat->x,
lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
}
}
if (!hUpArrow) SCROLL_LoadBitmaps();
dprintf_scroll( stddeb, "ScrollBar creation, hwnd=%04x\n", hwnd );
return 0;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MOUSEMOVE:
case WM_SYSTIMER:
SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, MAKEPOINT16(lParam) );
break;
case WM_KEYDOWN:
SCROLL_HandleKbdEvent( hwnd, wParam );
break;
case WM_ERASEBKGND:
return 1;
case WM_GETDLGCODE:
return DLGC_WANTARROWS; /* Windows returns this value */
PAINTSTRUCT16 ps;
HDC16 hdc = BeginPaint16( hwnd, &ps );
case SBM_SETSCROLLPOS:
return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
case SBM_GETSCROLLPOS:
return GetScrollPos( hwnd, SB_CTL );
case SBM_SETSCROLLRANGE:
SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
wParam /* FIXME: Is this correct? */ );
return 0;
case SBM_ENABLE:
return EnableScrollBar( hwnd, SB_CTL, wParam ); /* FIXME: lParam? */
case 0x403: /* SBM_REDRAW */
fprintf(stdnimp,"ScrollBarWndProc: undocumented message %04x, please report\n", message );
return DefWindowProc16( hwnd, message, wParam, lParam );
/*************************************************************************
int SetScrollPos( HWND hwnd, int nBar, int nPos, BOOL bRedraw )
INT oldPos;
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
dprintf_scroll( stddeb,"SetScrollPos min=%d max=%d pos=%d\n",
infoPtr->MinVal, infoPtr->MaxVal, nPos );
if (nPos < infoPtr->MinVal) nPos = infoPtr->MinVal;
else if (nPos > infoPtr->MaxVal) nPos = infoPtr->MaxVal;
oldPos = infoPtr->CurVal;
infoPtr->CurVal = nPos;
if (bRedraw) SCROLL_RefreshScrollBar( hwnd, nBar );
return oldPos;
}
/*************************************************************************
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
return infoPtr->CurVal;
/*************************************************************************
void SetScrollRange(HWND hwnd, int nBar, int MinVal, int MaxVal, BOOL bRedraw)
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
dprintf_scroll( stddeb,"SetScrollRange hwnd=%04x bar=%d min=%d max=%d\n",
/* Invalid range -> range is set to (0,0) */
if ((MinVal > MaxVal) || ((long)MaxVal - MinVal > 32767L))
MinVal = MaxVal = 0;
if (infoPtr->CurVal < MinVal) infoPtr->CurVal = MinVal;
else if (infoPtr->CurVal > MaxVal) infoPtr->CurVal = MaxVal;
infoPtr->MinVal = MinVal;
infoPtr->MaxVal = MaxVal;
/* Non-client scroll-bar is hidden if min==max */
if (nBar != SB_CTL) ShowScrollBar( hwnd, nBar, (MinVal != MaxVal) );
if (bRedraw) SCROLL_RefreshScrollBar( hwnd, nBar );
}
/*************************************************************************
* SCROLL_SetNCSbState
*
* This is for CalcChildScroll in windows/mdi.c
*/
DWORD SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
int hMin, int hMax, int hPos)
{
SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_VERT);
wndPtr->dwStyle |= (WS_VSCROLL | WS_HSCROLL);
if( vMin >= vMax )
{ vMin = vMax;
wndPtr->dwStyle &= ~WS_VSCROLL; }
if( vPos > vMax ) vPos = vMax; else if( vPos < vMin ) vPos = vMin;
infoPtr->MinVal = vMin;
infoPtr->MaxVal = vMax;
infoPtr->CurVal = vPos;
infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_HORZ);
if( hMin >= hMax )
{ hMin = hMax;
wndPtr->dwStyle &= ~WS_HSCROLL; }
if( hPos > hMax ) hPos = hMax; else if( hPos < hMin ) hPos = hMin;
infoPtr->MinVal = hMin;
infoPtr->MaxVal = hMax;
infoPtr->CurVal = hPos;
return wndPtr->dwStyle & (WS_VSCROLL | WS_HSCROLL);
}
/*************************************************************************
void GetScrollRange(HWND hwnd, int nBar, LPINT16 lpMin, LPINT16 lpMax)
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
if (lpMin) *lpMin = infoPtr->MinVal;
if (lpMax) *lpMax = infoPtr->MaxVal;
/*************************************************************************
* ShowScrollBar (USER.267)
*/
void ShowScrollBar( HWND hwnd, WORD wBar, BOOL fShow )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
if (!wndPtr) return;
dprintf_scroll( stddeb, "ShowScrollBar: hwnd=%04x bar=%d on=%d\n", hwnd, wBar, fShow );
switch(wBar)
{
case SB_CTL:
ShowWindow( hwnd, fShow ? SW_SHOW : SW_HIDE );
return;
case SB_HORZ:
if (fShow)
{
if (wndPtr->dwStyle & WS_HSCROLL) return;
wndPtr->dwStyle |= WS_HSCROLL;
}
else /* hide it */
{
if (!(wndPtr->dwStyle & WS_HSCROLL)) return;
wndPtr->dwStyle &= ~WS_HSCROLL;
}
break;
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
case SB_VERT:
if (fShow)
{
if (wndPtr->dwStyle & WS_VSCROLL) return;
wndPtr->dwStyle |= WS_VSCROLL;
}
else /* hide it */
{
if (!(wndPtr->dwStyle & WS_VSCROLL)) return;
wndPtr->dwStyle &= ~WS_VSCROLL;
}
break;
case SB_BOTH:
if (fShow)
{
if ((wndPtr->dwStyle & WS_HSCROLL)
&& (wndPtr->dwStyle & WS_VSCROLL)) return;
wndPtr->dwStyle |= WS_HSCROLL | WS_VSCROLL;
}
else /* hide it */
{
if (!(wndPtr->dwStyle & WS_HSCROLL)
&& !(wndPtr->dwStyle & WS_HSCROLL)) return;
wndPtr->dwStyle &= ~(WS_HSCROLL | WS_VSCROLL);
}
break;
default:
return; /* Nothing to do! */
}
SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
| SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
}
/*************************************************************************
* EnableScrollBar (USER.482)
*/
BOOL EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )