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* Interface code to SCROLLBAR widget
*
* Copyright Martin Ayotte, 1993
*
* Small fixes and implemented SB_THUMBPOSITION
* by Peter Broadhurst, 940611
*/
static char Copyright[] = "Copyright Martin Ayotte, 1993";
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
/* #define DEBUG_SCROLL */
/* #undef DEBUG_SCROLL */
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))
extern void GRAPH_DrawReliefRect( HDC hdc, RECT *rect, int highlight_size,
int shadow_size, BOOL pressed );
/* 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 */
};
/***********************************************************************
static void SCROLL_LoadBitmaps(void)
{
hUpArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROW));
hDnArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROW));
hLfArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROW));
hRgArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROW));
hUpArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWD));
hDnArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWD));
hLfArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWD));
hRgArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWD));
hUpArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWI));
hDnArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWI));
hLfArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWI));
hRgArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWI));
/***********************************************************************
* SCROLL_GetScrollInfo
*/
static SCROLLINFO *SCROLL_GetScrollInfo( HWND hwnd, int nBar )
HANDLE handle;
WND *wndPtr = WIN_FindWndPtr( hwnd );
switch(nBar)
{
case SB_HORZ: handle = wndPtr->hHScroll; break;
case SB_VERT: handle = wndPtr->hVScroll; break;
case SB_CTL: return (SCROLLINFO *)wndPtr->wExtra;
default: return NULL;
}
if (!handle) /* Create the info structure if needed */
{
if ((handle = USER_HEAP_ALLOC( GMEM_MOVEABLE, sizeof(SCROLLINFO) )))
{
SCROLLINFO *infoPtr = (SCROLLINFO *) USER_HEAP_ADDR( handle );
infoPtr->MinVal = infoPtr->CurVal = 0;
infoPtr->MaxVal = 100;
infoPtr->flags = ESB_ENABLE_BOTH;
if (nBar == SB_HORZ) wndPtr->hHScroll = handle;
else wndPtr->hVScroll = handle;
}
if (!hUpArrow) SCROLL_LoadBitmaps();
}
return (SCROLLINFO *) USER_HEAP_ADDR( handle );
/***********************************************************************
* 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, RECT *lprect,
WORD *arrowSize, WORD *thumbPos )
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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:
GetClientRect( hwnd, lprect );
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)
{
SCROLLINFO *info = SCROLL_GetScrollInfo( hwnd, 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( SCROLLINFO *infoPtr, RECT *rect,
WORD arrowSize, BOOL vertical, WORD pos )
int pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
if ((pixels -= 3*SYSMETRICS_CXVSCROLL+1) <= 0) return infoPtr->MinVal;
pos = max( 0, pos - SYSMETRICS_CXVSCROLL );
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, POINT pt )
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WORD arrowSize, thumbPos;
RECT rect;
BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
if (!PtInRect( &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, SCROLLINFO *infoPtr, RECT *rect,
WORD arrowSize, BOOL vertical,
BOOL top_pressed, BOOL bottom_pressed )
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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, RECT *rect, BOOL vertical,
WORD arrowSize, WORD thumbPos )
RECT r = *rect;
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;
}
InflateRect( &r, -1, -1 );
DrawFocusRect( hdc, &r );
/***********************************************************************
* SCROLL_DrawInterior
*
* Draw the scroll bar interior (everything except the arrows).
*/
static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, int nBar, RECT *rect,
WORD arrowSize, WORD thumbPos, WORD flags,
BOOL vertical, BOOL top_selected,
BOOL bottom_selected )
RECT r;
WND *wndPtr = WIN_FindWndPtr( hwnd );
if (((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL))
|| ((nBar == SB_HORZ) && (!wndPtr->dwStyle & WS_HSCROLL))) return;
/* 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 */
{
HBRUSH hbrush = SendMessage( GetParent(hwnd), WM_CTLCOLOR, hdc,
MAKELONG(hwnd, CTLCOLOR_SCROLLBAR) );
SelectObject( hdc, hbrush );
}
else SelectObject( hdc, sysColorObjects.hbrushScrollbar );
}
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/* 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,
r.bottom - r.top - 2, SRCCOPY );
return;
}
if (vertical)
{
PatBlt( hdc, r.left + 1, r.top + 1,
r.right - r.left - 2,
thumbPos - arrowSize,
top_selected ? NOTSRCCOPY : SRCCOPY );
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,
bottom_selected ? NOTSRCCOPY : SRCCOPY );
r.bottom = r.top + SYSMETRICS_CYHSCROLL + 1;
}
else /* horizontal */
{
PatBlt( hdc, r.left + 1, r.top + 1,
thumbPos - arrowSize,
r.bottom - r.top - 2,
top_selected ? NOTSRCCOPY : SRCCOPY );
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,
bottom_selected ? NOTSRCCOPY : SRCCOPY );
r.right = r.left + SYSMETRICS_CXVSCROLL + 1;
}
/* Draw the thumb */
SelectObject( hdc, sysColorObjects.hbrushBtnFace );
Rectangle( hdc, r.left, r.top, r.right, r.bottom );
InflateRect( &r, -1, -1 );
GRAPH_DrawReliefRect( hdc, &r, 1, 2, FALSE );
}
/***********************************************************************
* SCROLL_DrawScrollBar
*
* Redraw the whole scrollbar.
*/
void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, int nBar )
WORD arrowSize, thumbPos;
RECT rect;
BOOL vertical;
SCROLLINFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
if (!infoPtr) 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 )
WORD arrowSize, thumbPos;
RECT rect;
BOOL vertical;
HDC hdc;
SCROLLINFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
if (!infoPtr) return;
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
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 )
WND *wndPtr = WIN_FindWndPtr( hwnd );
WORD msg;
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;
}
SendMessage( GetParent(hwnd),
(wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
msg, MAKELONG( 0, 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, POINT pt )
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/* Previous mouse position for timer events */
static POINT prevPt;
/* 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;
RECT rect;
HDC hdc;
SCROLLINFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
if (!infoPtr) return;
if ((trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN)) return;
hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbPos );
hwndOwner = (nBar == SB_CTL) ? GetParent(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 );
if (nBar == SB_CTL) SetFocus( 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=%x 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)
{
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEUP, MAKELONG( 0, hwndCtl ));
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
case SCROLL_TOP_RECT:
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical,
(hittest == trackHitTest), FALSE );
if (hittest == trackHitTest)
{
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEUP, MAKELONG( 0, hwndCtl ));
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
case SCROLL_THUMB:
if (msg == WM_LBUTTONDOWN)
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
else if (msg == WM_LBUTTONUP)
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical, FALSE, FALSE );
else /* WM_MOUSEMOVE */
{
UINT pos, val;
if (!PtInRect( &rect, pt )) pos = lastClickPos;
else pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
if (pos != lastMousePos)
{
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
trackThumbPos + pos - lastClickPos );
lastMousePos = pos;
val = SCROLL_GetThumbVal( infoPtr, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_THUMBTRACK, MAKELONG( val, hwndCtl ));
}
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break;
case SCROLL_BOTTOM_RECT:
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
infoPtr->flags, vertical,
FALSE, (hittest == trackHitTest) );
if (hittest == trackHitTest)
{
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEDOWN, MAKELONG( 0, hwndCtl ));
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
case SCROLL_BOTTOM_ARROW:
SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
FALSE, (hittest == trackHitTest) );
if (hittest == trackHitTest)
{
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEDOWN, MAKELONG( 0, hwndCtl ));
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
}
if (msg == WM_LBUTTONUP)
{
if (trackHitTest == SCROLL_THUMB)
{
UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical, arrowSize,
trackThumbPos + lastMousePos - lastClickPos );
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_THUMBPOSITION, MAKELONG( val, hwndCtl ) );
}
else
SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_ENDSCROLL, MAKELONG( 0, hwndCtl ) );
trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
}
ReleaseDC( hwnd, hdc );
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/***********************************************************************
* ScrollBarWndProc
*/
LONG ScrollBarWndProc( HWND hwnd, WORD message, WORD wParam, LONG lParam )
{
switch(message)
{
case WM_CREATE:
{
CREATESTRUCT *lpCreat = (CREATESTRUCT *)lParam;
if (lpCreat->style & SBS_SIZEBOX)
{
fprintf( stdnimp, "Unimplemented style SBS_SIZEBOX.\n" );
return -1;
}
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=%d\n", hwnd );
return 0;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MOUSEMOVE:
case WM_SYSTIMER:
SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, MAKEPOINT(lParam) );
break;
case WM_KEYDOWN:
SCROLL_HandleKbdEvent( hwnd, wParam );
break;
case WM_ERASEBKGND:
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint( hwnd, &ps );
SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL );
EndPaint( hwnd, &ps );
}
break;
default:
return DefWindowProc( hwnd, message, wParam, lParam );
}
return 0;
}
/*************************************************************************
int SetScrollPos( HWND hwnd, int nBar, int nPos, BOOL bRedraw )
SCROLLINFO *infoPtr;
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)
SCROLLINFO *infoPtr;
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
dprintf_scroll( stddeb,"SetScrollRange min=%d max=%d\n", MinVal, MaxVal );
/* 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 iff range is (0,0) */
if (nBar != SB_CTL) ShowScrollBar( hwnd, nBar, (MinVal || MaxVal) );
if (bRedraw) SCROLL_RefreshScrollBar( hwnd, nBar );
}
/*************************************************************************
void GetScrollRange(HWND hwnd, int nBar, LPINT lpMin, LPINT lpMax)
SCROLLINFO *infoPtr;
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
if (lpMin) *lpMin = infoPtr->MinVal;
if (lpMax) *lpMax = infoPtr->MaxVal;
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/*************************************************************************
* ShowScrollBar (USER.267)
*/
void ShowScrollBar( HWND hwnd, WORD wBar, BOOL fShow )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
if (!wndPtr) return;
dprintf_scroll( stddeb, "ShowScrollBar: %x %d %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;
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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 );
/* FIXME: Hack until SetWindowPos works correctly */
InvalidateRect( hwnd, NULL, TRUE );
}
/*************************************************************************
* EnableScrollBar (USER.482)
*/
BOOL EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
{
SCROLLINFO *infoPtr;
HDC hdc;
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
dprintf_scroll( stddeb, "EnableScrollBar: %x %d %d\n", hwnd, nBar, flags );
flags &= ESB_DISABLE_BOTH;
if (infoPtr->flags == flags) return FALSE;
infoPtr->flags = flags;
/* Redraw the whole scroll bar */
hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
SCROLL_DrawScrollBar( hwnd, hdc, nBar );
ReleaseDC( hwnd, hdc );
return TRUE;
}