Sweden-Number/controls/scroll.c

816 lines
22 KiB
C

/*
* Interface code to SCROLLBAR widget
*
* Copyright Martin Ayotte, 1993
*
* Small fixes and implemented SB_THUMBPOSITION
* by Peter Broadhurst, 940611
*/
/*
#define DEBUG_SCROLL
*/
static char Copyright[] = "Copyright Martin Ayotte, 1993";
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "windows.h"
#include "sysmetrics.h"
#include "scroll.h"
#include "heap.h"
#include "win.h"
#include "prototypes.h"
HBITMAP hUpArrow = 0;
HBITMAP hDnArrow = 0;
HBITMAP hLfArrow = 0;
HBITMAP hRgArrow = 0;
HBITMAP hUpArrowD = 0;
HBITMAP hDnArrowD = 0;
HBITMAP hLfArrowD = 0;
HBITMAP hRgArrowD = 0;
LPHEADSCROLL ScrollBarGetWindowAndStorage(HWND hWnd, WND **wndPtr);
LPHEADSCROLL ScrollBarGetStorageHeader(HWND hWnd);
LPHEADSCROLL GetScrollObjectStruct(HWND hWnd, int nBar);
void ScrollBarButtonDown(HWND hWnd, int nBar, int x, int y);
void ScrollBarButtonUp(HWND hWnd, int nBar, int x, int y);
void ScrollBarMouseMove(HWND hWnd, int nBar, WORD wParam, int x, int y);
void StdDrawScrollBar(HWND hWnd, HDC hDC, int nBar, LPRECT lprect, LPHEADSCROLL lphs);
int CreateScrollBarStruct(HWND hWnd);
void NC_CreateScrollBars(HWND hWnd);
LPHEADSCROLL AllocScrollBar(DWORD dwStyle, int width, int height);
/***********************************************************************
* WIDGETS_ScrollBarWndProc
*/
LONG ScrollBarWndProc( HWND hWnd, WORD message, WORD wParam, LONG lParam )
{
WORD wRet;
short x, y;
short width, height;
WND *wndPtr;
LPHEADSCROLL lphs;
PAINTSTRUCT ps;
HDC hDC;
BITMAP bm;
RECT rect, rect2;
LPCREATESTRUCT lpCreat;
static RECT rectsel;
POINT *pt;
pt=(POINT*)&lParam;
switch(message) {
case WM_CREATE:
lpCreat = (LPCREATESTRUCT)lParam;
if (lpCreat->style & SBS_VERT) {
if (lpCreat->style & SBS_LEFTALIGN)
SetWindowPos(hWnd, 0, 0, 0, 16, lpCreat->cy,
SWP_NOZORDER | SWP_NOMOVE);
if (lpCreat->style & SBS_RIGHTALIGN)
SetWindowPos(hWnd, 0, lpCreat->x + lpCreat->cx - 16,
lpCreat->y, 16, lpCreat->cy, SWP_NOZORDER);
}
if (lpCreat->style & SBS_HORZ) {
if (lpCreat->style & SBS_TOPALIGN)
SetWindowPos(hWnd, 0, 0, 0, lpCreat->cx, 16,
SWP_NOZORDER | SWP_NOMOVE);
if (lpCreat->style & SBS_BOTTOMALIGN)
SetWindowPos(hWnd, 0, lpCreat->x,
lpCreat->y + lpCreat->cy - 16,
lpCreat->cx, 16, SWP_NOZORDER);
}
CreateScrollBarStruct(hWnd);
#ifdef DEBUG_SCROLL
printf("ScrollBar Creation !\n");
#endif
return 0;
case WM_DESTROY:
lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
if (lphs == 0) return 0;
#ifdef DEBUG_SCROLL
printf("ScrollBar WM_DESTROY %lX !\n", lphs);
#endif
free(lphs);
*((LPHEADSCROLL *)&wndPtr->wExtra[1]) = 0;
return 0;
case WM_LBUTTONDOWN:
SetCapture(hWnd);
ScrollBarButtonDown(hWnd, SB_CTL, pt->x,pt->y);
break;
case WM_LBUTTONUP:
ReleaseCapture();
ScrollBarButtonUp(hWnd, SB_CTL, pt->x,pt->y);
break;
case WM_MOUSEMOVE:
ScrollBarMouseMove(hWnd, SB_CTL, wParam, pt->x,pt->y);
break;
case WM_KEYDOWN:
case WM_KEYUP:
case WM_CHAR:
lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
return(SendMessage(wndPtr->hwndParent, message, wParam, lParam));
case WM_TIMER:
#ifdef DEBUG_SCROLL
printf("ScrollBar WM_TIMER wParam=%X lParam=%lX !\n", wParam, lParam);
#endif
lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
KillTimer(hWnd, wParam);
switch(lphs->ButtonDown) {
case 0:
lphs->TimerPending = FALSE;
return 0;
case 1:
case 3:
SendMessage(wndPtr->hwndParent, lphs->Direction,
SB_LINEUP, MAKELONG(0, hWnd));
break;
case 2:
case 4:
SendMessage(wndPtr->hwndParent, lphs->Direction,
SB_LINEDOWN, MAKELONG(0, hWnd));
break;
case 5:
SendMessage(wndPtr->hwndParent, lphs->Direction,
SB_PAGEUP, MAKELONG(0, hWnd));
break;
case 6:
SendMessage(wndPtr->hwndParent, lphs->Direction,
SB_PAGEDOWN, MAKELONG(0, hWnd));
break;
}
SetTimer(hWnd, 1, 100, NULL);
return 0;
case WM_PAINT:
hDC = BeginPaint(hWnd, &ps);
lphs = ScrollBarGetStorageHeader(hWnd);
if (lphs != NULL) {
GetClientRect(hWnd, &rect);
StdDrawScrollBar(hWnd, hDC, SB_CTL, &rect, lphs);
}
EndPaint(hWnd, &ps);
break;
default:
return DefWindowProc( hWnd, message, wParam, lParam );
}
return(0);
}
void ScrollBarButtonDown(HWND hWnd, int nBar, int x, int y)
{
LPHEADSCROLL lphs;
HWND hWndParent;
RECT rect, rect2;
int width, height;
LONG dwOwner;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (nBar == SB_CTL) {
hWndParent = GetParent(hWnd);
dwOwner = MAKELONG(0, lphs->hWndOwner);
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown SB_CTL // x=%d y=%d\n", x, y);
#endif
}
else {
hWndParent = hWnd;
dwOwner = 0L;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown SB_?SCROLL // x=%d y=%d\n", x, y);
#endif
}
/*
SetFocus(lphs->hWndOwner);
*/
CopyRect(&rect, &lphs->rect);
#ifdef DEBUG_SCROLL
printf("ScrollDown / x=%d y=%d left=%d top=%d right=%d bottom=%d \n",
x, y, rect.left, rect.top, rect.right, rect.bottom);
#endif
if (lphs->Direction == WM_VSCROLL) {
width = rect.right - rect.left;
if (y <= lphs->rectUp.bottom) {
lphs->ButtonDown = 1;
InvalidateRect(lphs->hWndOwner, &lphs->rectUp, TRUE);
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_LINEUP\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_LINEUP, dwOwner);
}
if (y >= lphs->rectDown.top) {
lphs->ButtonDown = 2;
InvalidateRect(lphs->hWndOwner, &lphs->rectDown, TRUE);
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_LINEDOWN\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_LINEDOWN, dwOwner);
}
if (y > lphs->rectUp.bottom && y < (lphs->CurPix + width)) {
lphs->ButtonDown = 5;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_PAGEUP\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_PAGEUP, dwOwner);
}
if (y < lphs->rectDown.top && y > (lphs->CurPix + (width << 1))) {
lphs->ButtonDown = 6;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_PAGEDOWN\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_PAGEDOWN, dwOwner);
}
if (lphs->MaxPix > 0 && y > (lphs->CurPix + width) &&
y < (lphs->CurPix + (width << 1))) {
lphs->ThumbActive = TRUE;
#ifdef DEBUG_SCROLL
printf("THUMB DOWN !\n");
#endif
}
}
else {
height = rect.bottom - rect.top;
if (x <= lphs->rectUp.right) {
lphs->ButtonDown = 3;
InvalidateRect(lphs->hWndOwner, &lphs->rectUp, TRUE);
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_LINEUP\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_LINEUP, dwOwner);
}
if (x >= lphs->rectDown.left) {
lphs->ButtonDown = 4;
InvalidateRect(lphs->hWndOwner, &lphs->rectDown, TRUE);
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_LINEDOWN\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_LINEDOWN, dwOwner);
}
if (x > lphs->rectUp.right && x < (lphs->CurPix + height)) {
lphs->ButtonDown = 5;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_PAGEUP\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_PAGEUP, dwOwner);
}
if (x < lphs->rectDown.left && x > (lphs->CurPix + (height << 1))) {
lphs->ButtonDown = 6;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonDown send SB_PAGEDOWN\n");
#endif
SendMessage(hWndParent, lphs->Direction,
SB_PAGEDOWN, dwOwner);
}
if (lphs->MaxPix > 0 && x > (lphs->CurPix + height) &&
x < (lphs->CurPix + (height << 1))) {
lphs->ThumbActive = TRUE;
#ifdef DEBUG_SCROLL
printf("THUMB DOWN !\n");
#endif
}
}
if (lphs->ButtonDown != 0) {
UpdateWindow(lphs->hWndOwner);
if (!lphs->TimerPending && nBar == SB_CTL) {
lphs->TimerPending = TRUE;
SetTimer(lphs->hWndOwner, 1, 500, NULL);
}
}
}
void ScrollBarButtonUp(HWND hWnd, int nBar, int x, int y)
{
LPHEADSCROLL lphs;
RECT rect, rect2;
HDC hDC;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonUp // x=%d y=%d\n", x, y);
#endif
lphs = GetScrollObjectStruct(hWnd, nBar);
if(lphs->ThumbActive)
{
HWND hWndOwner,hWndParent;
if (nBar == SB_CTL) {
hWndParent = GetParent(hWnd);
hWndOwner = lphs->hWndOwner;
}
else {
hWndParent = hWnd;
hWndOwner = 0;
}
SendMessage(hWndParent, lphs->Direction,
SB_THUMBPOSITION, MAKELONG(lphs->ThumbVal, hWndOwner));
lphs->ThumbActive = FALSE;
}
if (lphs->ButtonDown != 0) {
lphs->ButtonDown = 0;
if (nBar == SB_CTL) {
GetClientRect(lphs->hWndOwner, &rect);
InvalidateRect(lphs->hWndOwner, &rect, TRUE);
UpdateWindow(lphs->hWndOwner);
}
else {
hDC = GetWindowDC(lphs->hWndOwner);
StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
ReleaseDC(lphs->hWndOwner, hDC);
}
}
}
void ScrollBarMouseMove(HWND hWnd, int nBar, WORD wParam, int x, int y)
{
LPHEADSCROLL lphs;
HWND hWndParent;
HWND hWndOwner;
LONG dwOwner;
if ((wParam & MK_LBUTTON) == 0) return;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (lphs->ThumbActive == 0) return;
if (nBar == SB_CTL) {
hWndParent = GetParent(hWnd);
hWndOwner = lphs->hWndOwner;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonMove SB_CTL // x=%d y=%d\n", x, y);
#endif
}
else {
hWndParent = hWnd;
hWndOwner = 0;
#ifdef DEBUG_SCROLL
printf("ScrollBarButtonMove SB_?SCROLL // x=%d y=%d\n", x, y);
#endif
}
if(x<lphs->rect.left||x>lphs->rect.right||
y<lphs->rect.top||y>lphs->rect.bottom)
{
#ifdef DEBUG_SCROLL
printf("Rejecting thumb position !\n");
#endif
lphs->ThumbVal=lphs->CurVal;/*revert to last set position*/
}
else
{
if (lphs->Direction == WM_VSCROLL) {
int butsiz = lphs->rect.right - lphs->rect.left;
y = y - butsiz - (butsiz >> 1);
}
else {
int butsiz = lphs->rect.bottom - lphs->rect.top;
y = x - butsiz - (butsiz >> 1);
}
if(y<0)y=0;
if(y>lphs->MaxPix)y=lphs->MaxPix;
lphs->ThumbVal = (y * (lphs->MaxVal - lphs->MinVal) /
lphs->MaxPix) + lphs->MinVal;
}
#ifdef DEBUG_SCROLL
printf("Scroll WM_MOUSEMOVE val=%d pix=%d\n", lphs->ThumbVal, y);
#endif
SendMessage(hWndParent, lphs->Direction,
SB_THUMBTRACK, MAKELONG(lphs->ThumbVal, hWndOwner));
}
LPHEADSCROLL ScrollBarGetWindowAndStorage(HWND hWnd, WND **wndPtr)
{
WND *Ptr;
LPHEADSCROLL lphs;
*(wndPtr) = Ptr = WIN_FindWndPtr(hWnd);
if (Ptr == 0) {
printf("Bad Window handle on ScrollBar !\n");
return 0;
}
lphs = *((LPHEADSCROLL *)&Ptr->wExtra[1]);
return lphs;
}
LPHEADSCROLL ScrollBarGetStorageHeader(HWND hWnd)
{
WND *wndPtr;
LPHEADSCROLL lphs;
wndPtr = WIN_FindWndPtr(hWnd);
if (wndPtr == 0) {
printf("Bad Window handle on ScrollBar !\n");
return 0;
}
lphs = *((LPHEADSCROLL *)&wndPtr->wExtra[1]);
return lphs;
}
void StdDrawScrollBar(HWND hWnd, HDC hDC, int nBar, LPRECT lprect, LPHEADSCROLL lphs)
{
HWND hWndParent;
HBRUSH hBrush;
HDC hMemDC;
BITMAP bm;
RECT rect;
UINT i, w, w2, h, h2, siz;
char C[128];
if (lphs == NULL) return;
#ifdef DEBUG_SCROLL
printf("StdDrawScrollBar nBar=%04X !\n", nBar);
if (lphs->Direction == WM_VSCROLL)
printf("StdDrawScrollBar Vertical left=%d top=%d right=%d bottom=%d !\n",
lprect->left, lprect->top, lprect->right, lprect->bottom);
else
printf("StdDrawScrollBar Horizontal left=%d top=%d right=%d bottom=%d !\n",
lprect->left, lprect->top, lprect->right, lprect->bottom);
#endif
if (nBar == SB_CTL)
hWndParent = GetParent(hWnd);
else
hWndParent = lphs->hWndOwner;
hBrush = SendMessage(hWndParent, WM_CTLCOLOR, (WORD)hDC,
MAKELONG(hWnd, CTLCOLOR_SCROLLBAR));
if (hBrush == (HBRUSH)NULL) hBrush = GetStockObject(LTGRAY_BRUSH);
CopyRect(&lphs->rect, lprect);
CopyRect(&lphs->rectUp, lprect);
CopyRect(&lphs->rectDown, lprect);
CopyRect(&rect, lprect);
w = rect.right - rect.left;
h = rect.bottom - rect.top;
if (w == 0 || h == 0) return;
if (lphs->Direction == WM_VSCROLL) {
if (h > 3 * w)
lphs->MaxPix = h - 3 * w;
else
lphs->MaxPix = 0;
if (h > 2 * w)
h2 = w;
else
h2 = (h - 4) / 2;
lphs->rectUp.bottom = h2;
lphs->rectDown.top = rect.bottom - h2;
}
else {
if (w > 3 * h)
lphs->MaxPix = w - 3 * h;
else
lphs->MaxPix = 0;
if (w > 2 * h)
w2 = h;
else
w2 = (w - 4) / 2;
lphs->rectUp.right = w2;
lphs->rectDown.left = rect.right - w2;
}
if (lphs->MaxVal != lphs->MinVal)
lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
(lphs->MaxVal - lphs->MinVal);
if(lphs->CurPix <0)lphs->CurPix=0;
if (lphs->CurPix > lphs->MaxPix) lphs->CurPix = lphs->MaxPix;
hMemDC = CreateCompatibleDC(hDC);
if (lphs->Direction == WM_VSCROLL) {
GetObject(hUpArrow, sizeof(BITMAP), (LPSTR)&bm);
if (lphs->ButtonDown == 1)
SelectObject(hMemDC, hUpArrowD);
else
SelectObject(hMemDC, hUpArrow);
StretchBlt(hDC, rect.left, rect.top, w, h2, hMemDC,
0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
GetObject(hDnArrow, sizeof(BITMAP), (LPSTR)&bm);
if (lphs->ButtonDown == 2)
SelectObject(hMemDC, hDnArrowD);
else
SelectObject(hMemDC, hDnArrow);
StretchBlt(hDC, rect.left, rect.bottom - h2, w, h2, hMemDC,
0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
rect.top += h2;
rect.bottom -= h2;
}
else {
GetObject(hLfArrow, sizeof(BITMAP), (LPSTR)&bm);
if (lphs->ButtonDown == 3)
SelectObject(hMemDC, hLfArrowD);
else
SelectObject(hMemDC, hLfArrow);
StretchBlt(hDC, rect.left, rect.top, w2, h, hMemDC,
0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
GetObject(hRgArrow, sizeof(BITMAP), (LPSTR)&bm);
if (lphs->ButtonDown == 4)
SelectObject(hMemDC, hRgArrowD);
else
SelectObject(hMemDC, hRgArrow);
StretchBlt(hDC, rect.right - w2, rect.top, w2, h, hMemDC,
0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
rect.left += w2;
rect.right -= w2;
}
DeleteDC(hMemDC);
FillRect(hDC, &rect, hBrush);
if (lphs->MaxPix != 0) {
if (lphs->Direction == WM_VSCROLL)
SetRect(&rect, rect.left, rect.top + lphs->CurPix,
rect.left + w, rect.top + lphs->CurPix + h2);
else
SetRect(&rect, rect.left + lphs->CurPix, rect.top,
rect.left + lphs->CurPix + w2, rect.top + h);
FrameRect(hDC, &rect, GetStockObject(BLACK_BRUSH));
InflateRect(&rect, -1, -1);
FillRect(hDC, &rect, GetStockObject(LTGRAY_BRUSH));
DrawReliefRect(hDC, rect, 2, 0);
InflateRect(&rect, -3, -3);
DrawReliefRect(hDC, rect, 1, 1);
}
}
int CreateScrollBarStruct(HWND hWnd)
{
RECT rect;
int width, height;
WND *wndPtr;
LPHEADSCROLL lphs;
wndPtr = WIN_FindWndPtr(hWnd);
width = wndPtr->rectClient.right - wndPtr->rectClient.left;
height = wndPtr->rectClient.bottom - wndPtr->rectClient.top;
if (width <= height)
lphs = AllocScrollBar(WS_VSCROLL, width, height);
else
lphs = AllocScrollBar(WS_HSCROLL, width, height);
#ifdef DEBUG_SCROLL
printf("CreateScrollBarStruct %lX !\n", lphs);
#endif
*((LPHEADSCROLL *)&wndPtr->wExtra[1]) = lphs;
lphs->hWndOwner = hWnd;
CopyRect(&lphs->rect, &wndPtr->rectClient);
return TRUE;
}
LPHEADSCROLL AllocScrollBar(DWORD dwStyle, int width, int height)
{
LPHEADSCROLL lphs;
if (hUpArrow == (HBITMAP)NULL)
hUpArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWI));
if (hDnArrow == (HBITMAP)NULL)
hDnArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWI));
if (hLfArrow == (HBITMAP)NULL)
hLfArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWI));
if (hRgArrow == (HBITMAP)NULL)
hRgArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWI));
if (hUpArrowD == (HBITMAP)NULL)
hUpArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWD));
if (hDnArrowD == (HBITMAP)NULL)
hDnArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWD));
if (hLfArrowD == (HBITMAP)NULL)
hLfArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWD));
if (hRgArrowD == (HBITMAP)NULL)
hRgArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWD));
lphs = (LPHEADSCROLL)malloc(sizeof(HEADSCROLL));
if (lphs == 0) {
printf("Bad Memory Alloc on ScrollBar !\n");
return NULL;
}
lphs->ThumbActive = FALSE;
lphs->TimerPending = FALSE;
lphs->ButtonDown = 0;
lphs->MinVal = 0;
lphs->MaxVal = 100;
lphs->CurVal = 0;
lphs->CurPix = 0;
SetRect(&lphs->rect, 0, 0, width, height);
if (dwStyle & WS_VSCROLL) {
if (height > 3 * width)
lphs->MaxPix = height - 3 * width;
else
lphs->MaxPix = 0;
lphs->Direction = WM_VSCROLL;
}
else {
if (width > 3 * height)
lphs->MaxPix = width - 3 * height;
else
lphs->MaxPix = 0;
lphs->Direction = WM_HSCROLL;
}
if (lphs->MaxPix < 1) lphs->MaxPix = 1;
return lphs;
}
void NC_CreateScrollBars(HWND hWnd)
{
RECT rect;
int width, height;
WND *wndPtr;
LPHEADSCROLL lphs;
wndPtr = WIN_FindWndPtr(hWnd);
GetWindowRect(hWnd, &rect);
width = rect.right - rect.left;
height = rect.bottom - rect.top;
if (wndPtr->dwStyle & WS_VSCROLL) {
if (wndPtr->dwStyle & WS_HSCROLL) height -= SYSMETRICS_CYHSCROLL;
lphs = AllocScrollBar(WS_VSCROLL, SYSMETRICS_CXVSCROLL, height);
#ifdef DEBUG_SCROLL
printf("NC_CreateScrollBars Vertical %lX !\n", lphs);
#endif
lphs->rect.left = width - SYSMETRICS_CYVSCROLL;
lphs->rect.right = width;
lphs->hWndOwner = hWnd;
wndPtr->VScroll = lphs;
wndPtr->scroll_flags |= 0x0001;
if (wndPtr->dwStyle & WS_HSCROLL) height += SYSMETRICS_CYHSCROLL;
}
if (wndPtr->dwStyle & WS_HSCROLL) {
if (wndPtr->dwStyle & WS_VSCROLL) width -= SYSMETRICS_CYVSCROLL;
lphs = AllocScrollBar(WS_HSCROLL, width, SYSMETRICS_CYHSCROLL);
#ifdef DEBUG_SCROLL
printf("NC_CreateScrollBars Horizontal %lX !\n", lphs);
#endif
lphs->rect.top = height - SYSMETRICS_CYHSCROLL;
lphs->rect.bottom = height;
lphs->hWndOwner = hWnd;
wndPtr->HScroll = lphs;
wndPtr->scroll_flags |= 0x0002;
}
}
/*************************************************************************
* GetScrollObjectStruct [internal]
*/
LPHEADSCROLL GetScrollObjectStruct(HWND hWnd, int nBar)
{
WND *wndPtr;
if (nBar != SB_CTL) {
wndPtr = WIN_FindWndPtr(hWnd);
if (nBar == SB_VERT) return (LPHEADSCROLL)wndPtr->VScroll;
if (nBar == SB_HORZ) return (LPHEADSCROLL)wndPtr->HScroll;
return NULL;
}
return ScrollBarGetStorageHeader(hWnd);
}
/*************************************************************************
* SetScrollPos [USER.62]
*/
int SetScrollPos(HWND hWnd, int nBar, int nPos, BOOL bRedraw)
{
LPHEADSCROLL lphs;
HDC hDC;
int nRet;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (lphs == NULL) return 0;
nRet = lphs->CurVal;
lphs->CurVal = (short)nPos;
if (lphs->MaxVal != lphs->MinVal)
lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
(lphs->MaxVal - lphs->MinVal);
if(lphs->CurPix <0)lphs->CurPix=0;
if (lphs->CurPix > lphs->MaxPix) lphs->CurPix = lphs->MaxPix;
#ifdef DEBUG_SCROLL
printf("SetScrollPos val=%d pixval=%d pixmax%d\n",
(short)nPos, lphs->CurPix, lphs->MaxPix);
printf("SetScrollPos min=%d max=%d\n",
lphs->MinVal, lphs->MaxVal);
#endif
if ((bRedraw) && (IsWindowVisible(lphs->hWndOwner))) {
if (nBar == SB_CTL) {
InvalidateRect(lphs->hWndOwner, &lphs->rect, TRUE);
UpdateWindow(lphs->hWndOwner);
}
else {
if (lphs->rect.right != 0 && lphs->rect.bottom != 0) {
hDC = GetWindowDC(lphs->hWndOwner);
StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
ReleaseDC(lphs->hWndOwner, hDC);
}
}
}
return nRet;
}
/*************************************************************************
* GetScrollPos [USER.63]
*/
int GetScrollPos(HWND hWnd, int nBar)
{
LPHEADSCROLL lphs;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (lphs == NULL) return 0;
return lphs->CurVal;
}
/*************************************************************************
* SetScrollRange [USER.64]
*/
void SetScrollRange(HWND hWnd, int nBar, int MinPos, int MaxPos, BOOL bRedraw)
{
LPHEADSCROLL lphs;
HDC hDC;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (lphs == NULL) return;
/* should a bad range be rejected here?
*/
lphs->MinVal = (short)MinPos;
lphs->MaxVal = (short)MaxPos;
if (lphs->MaxVal != lphs->MinVal)
lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
(lphs->MaxVal - lphs->MinVal);
if(lphs->CurPix <0)lphs->CurPix=0;
if (lphs->CurPix > lphs->MaxPix) lphs->CurPix = lphs->MaxPix;
#ifdef DEBUG_SCROLL
printf("SetScrollRange min=%d max=%d\n", lphs->MinVal, lphs->MaxVal);
#endif
if ((bRedraw) && (IsWindowVisible(lphs->hWndOwner))) {
if (nBar == SB_CTL) {
InvalidateRect(lphs->hWndOwner, &lphs->rect, TRUE);
UpdateWindow(lphs->hWndOwner);
}
else {
if (lphs->rect.right != 0 && lphs->rect.bottom != 0) {
hDC = GetWindowDC(lphs->hWndOwner);
StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
ReleaseDC(lphs->hWndOwner, hDC);
}
}
}
}
/*************************************************************************
* GetScrollRange [USER.65]
*/
void GetScrollRange(HWND hWnd, int nBar, LPINT lpMin, LPINT lpMax)
{
LPHEADSCROLL lphs;
lphs = GetScrollObjectStruct(hWnd, nBar);
if (lphs == NULL) return;
*lpMin = lphs->MinVal;
*lpMax = lphs->MaxVal;
}
/*************************************************************************
* ShowScrollBar [USER.267]
*/
void ShowScrollBar(HWND hWnd, WORD wBar, BOOL bFlag)
{
WND *wndPtr;
printf("ShowScrollBar hWnd=%04X wBar=%d bFlag=%d\n", hWnd, wBar, bFlag);
#ifdef DEBUG_SCROLL
printf("ShowScrollBar hWnd=%04X wBar=%d bFlag=%d\n", hWnd, wBar, bFlag);
#endif
if (wBar == SB_CTL) {
if (bFlag)
ShowWindow(hWnd, SW_SHOW);
else
ShowWindow(hWnd, SW_HIDE);
return;
}
wndPtr = WIN_FindWndPtr(hWnd);
if ((wBar == SB_VERT) || (wBar == SB_BOTH)) {
if (bFlag)
wndPtr->scroll_flags != 0x0001;
else
wndPtr->scroll_flags &= 0xFFFE;
}
if ((wBar == SB_HORZ) || (wBar == SB_BOTH)) {
if (bFlag)
wndPtr->scroll_flags != 0x0002;
else
wndPtr->scroll_flags &= 0xFFFD;
}
SetWindowPos(hWnd, 0, 0, 0, 0, 0,
SWP_NOZORDER | SWP_NOMOVE |
SWP_NOSIZE | SWP_FRAMECHANGED);
}