556 lines
13 KiB
C
556 lines
13 KiB
C
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/**************************************************************************
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*
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* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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* KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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* PURPOSE.
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*
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* Copyright (c) 1992 - 1995 Microsoft Corporation. All Rights Reserved.
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*
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**************************************************************************/
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/****************************************************************************
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*
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* vidframe.c: Frame for the capture window
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*
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* Vidcap32 Source code
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*
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***************************************************************************/
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/*
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* Window class that provides a frame for the AVICAP window in the
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* VidCap capture tool. Responsible for positioning within the
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* parent window, handling scrolling and painting a size border if
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* there is room.
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*/
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#include <windows.h>
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#include <windowsx.h>
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#include <mmsystem.h>
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#include <mmreg.h>
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#include <vfw.h>
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#include "vidcap.h"
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#include "vidframe.h"
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/*
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* pixels to move when asked to scroll one line or page
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*/
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#define LINE_SCROLL 10
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#define PAGE_SCROLL 50
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// class name
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#define VIDFRAMECLASSNAME "vidframeClass"
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/*
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* standard brushes
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*/
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static HBRUSH ghbrBackground = NULL, ghbrFace, ghbrHighlight, ghbrShadow;
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static BOOL fhbrBackgroundIsSysObj;
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/*
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* create brushes to be used in painting
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*/
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void
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vidframeCreateTools(HWND hwnd)
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{
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vidframeSetBrush(hwnd, gBackColour);
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ghbrHighlight = CreateSolidBrush(GetSysColor(COLOR_BTNHIGHLIGHT));
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ghbrShadow = CreateSolidBrush(GetSysColor(COLOR_BTNSHADOW));
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ghbrFace = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));
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}
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void
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vidframeDeleteTools(void)
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{
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if (ghbrBackground) {
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if (!fhbrBackgroundIsSysObj) {
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DeleteObject(ghbrBackground);
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ghbrBackground = NULL;
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}
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}
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if (ghbrHighlight) {
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DeleteObject(ghbrHighlight);
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ghbrHighlight = NULL;
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}
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if (ghbrShadow) {
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DeleteObject(ghbrShadow);
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ghbrShadow = NULL;
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}
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if (ghbrFace) {
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DeleteObject(ghbrFace);
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ghbrFace = NULL;
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}
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}
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/*
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* change the background fill brush to be one of-
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* IDD_PrefsDefBackground - windows default background colour
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* IDD_PrefsLtGrey - light grey
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* IDD_PrefsDkGrey - dark grey
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* IDD_PrefsBlack - black
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*/
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void
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vidframeSetBrush(HWND hwnd, int iPref)
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{
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if (ghbrBackground != NULL) {
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if (!fhbrBackgroundIsSysObj) {
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DeleteObject(ghbrBackground);
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ghbrBackground = NULL;
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}
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}
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switch(iPref) {
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case IDD_PrefsDefBackground:
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ghbrBackground = CreateSolidBrush(GetSysColor(COLOR_WINDOW));
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fhbrBackgroundIsSysObj = FALSE;
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break;
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case IDD_PrefsLtGrey:
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ghbrBackground = GetStockObject(LTGRAY_BRUSH);
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fhbrBackgroundIsSysObj = TRUE;
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break;
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case IDD_PrefsDkGrey:
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ghbrBackground = GetStockObject(DKGRAY_BRUSH);
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fhbrBackgroundIsSysObj = TRUE;
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break;
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case IDD_PrefsBlack:
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ghbrBackground = GetStockObject(BLACK_BRUSH);
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fhbrBackgroundIsSysObj = TRUE;
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break;
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default:
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return;
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}
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if (hwnd != NULL) {
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#ifdef _WIN32
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SetClassLongPtr(hwnd, GCLP_HBRBACKGROUND, (LONG_PTR) ghbrBackground);
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#else
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SetClassWord(hwnd, GCW_HBRBACKGROUND, (WORD) ghbrBackground);
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#endif
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InvalidateRect(hwnd, NULL, TRUE);
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}
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}
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/*
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* layout the window - decide if we need scrollbars or
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* not, and position the avicap window correctly
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*/
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void
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vidframeLayout(HWND hwnd, HWND hwndCap)
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{
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RECT rc;
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RECT rcCap;
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CAPSTATUS cs;
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int cx, cy;
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POINT ptScroll;
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// get the x and y scroll pos so we can reset them
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ptScroll.y = GetScrollPos(hwnd, SB_VERT);
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ptScroll.x = GetScrollPos(hwnd, SB_HORZ);
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GetClientRect(hwnd, &rc);
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if (!capGetStatus(hwndCap, &cs, sizeof(cs))) {
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// no current window? - make it 0 size
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cs.uiImageWidth = 0;
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cs.uiImageHeight = 0;
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}
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SetRect(&rcCap, 0, 0, cs.uiImageWidth, cs.uiImageHeight);
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/*
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* check which scrollbars we need - note that adding and removing
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* scrollbars affects the other dimension - so recheck client rect
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*/
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if (RECTWIDTH(rcCap) < RECTWIDTH(rc)) {
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// fits horz.
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SetScrollRange(hwnd, SB_HORZ, 0, 0, TRUE);
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} else {
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// need horz scrollbar
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SetScrollRange(hwnd, SB_HORZ, 0, RECTWIDTH(rcCap) - RECTWIDTH(rc), FALSE);
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}
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// get client size in case shrunk/expanded
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GetClientRect(hwnd, &rc);
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// check vert scrollbar
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if (RECTHEIGHT(rcCap) < RECTHEIGHT(rc)) {
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SetScrollRange(hwnd, SB_VERT, 0, 0, TRUE);
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} else {
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SetScrollRange(hwnd, SB_VERT, 0, RECTHEIGHT(rcCap) - RECTHEIGHT(rc), FALSE);
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// this may have caused the horz scrollbar to be unneeded
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GetClientRect(hwnd, &rc);
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if (RECTWIDTH(rcCap) < RECTWIDTH(rc)) {
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// fits horz.
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SetScrollRange(hwnd, SB_HORZ, 0, 0, TRUE);
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} else {
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// need horz scrollbar
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SetScrollRange(hwnd, SB_HORZ, 0, RECTWIDTH(rcCap) - RECTWIDTH(rc), FALSE);
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}
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}
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/*
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* be sure we don't leave any underwear showing if we have scrolled
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* back or removed the scrollbars
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*/
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{
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int cmax, cmin;
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GetScrollRange(hwnd, SB_HORZ, &cmin, &cmax);
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if (ptScroll.x > cmax) {
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ptScroll.x = cmax;
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}
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GetScrollRange(hwnd, SB_VERT, &cmin, &cmax);
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if (ptScroll.y > cmax) {
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ptScroll.y = cmax;
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}
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SetScrollPos(hwnd, SB_HORZ, ptScroll.x, TRUE);
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SetScrollPos(hwnd, SB_VERT, ptScroll.y, TRUE);
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capSetScrollPos(hwndCap, &ptScroll);
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}
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// centre the window if requested and if room
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if(gbCentre) {
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GetClientRect(hwnd, &rc);
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cx = max(0, (RECTWIDTH(rc) - (int) cs.uiImageWidth)/2);
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cy = max(0, (RECTHEIGHT(rc) - (int) cs.uiImageHeight)/2);
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OffsetRect(&rcCap, cx, cy);
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}
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// DWORD align the capture window for optimal codec speed
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// during preview.
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rc = rcCap;
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MapWindowPoints (hwnd, NULL, (LPPOINT)&rc, 1);
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cx = rc.left - (rc.left & ~3);
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OffsetRect(&rcCap, -cx, 0);
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MoveWindow(hwndCap,
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rcCap.left, rcCap.top,
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RECTWIDTH(rcCap), RECTHEIGHT(rcCap),
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TRUE);
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InvalidateRect(hwnd, NULL, TRUE);
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}
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/*
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* paint the vidframe window. The fill colour is always selected as the
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* background brush, so all we need to do here is paint the
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* fancy border around the inner window if room.
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*/
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void
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vidframePaint(HWND hwnd, HWND hwndCap)
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{
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POINT ptInner;
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RECT rcCap;
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PAINTSTRUCT ps;
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HDC hdc;
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HBRUSH hbr;
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int cx, cy;
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hdc = BeginPaint(hwnd, &ps);
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/*
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* first calculate the location of the upper left corner
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* of the avicap window in vidframe-window client co-ordinates
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*/
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ptInner.x = 0;
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ptInner.y = 0;
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MapWindowPoints(hwndCap, hwnd, &ptInner, 1);
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// width and height of cap window
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GetWindowRect(hwndCap, &rcCap);
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cx = RECTWIDTH(rcCap);
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cy = RECTHEIGHT(rcCap);
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// shadow lines
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hbr = SelectObject(hdc, ghbrShadow);
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PatBlt(hdc, ptInner.x-1, ptInner.y-1, cx + 1, 1, PATCOPY);
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PatBlt(hdc, ptInner.x-1, ptInner.y-1, 1, cy + 1, PATCOPY);
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PatBlt(hdc, ptInner.x + cx + 4, ptInner.y-5, 1, cy+10, PATCOPY);
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PatBlt(hdc, ptInner.x -5, ptInner.y+cy+4, cx+10, 1, PATCOPY);
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// hi-light lines
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SelectObject(hdc, ghbrHighlight);
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PatBlt(hdc, ptInner.x - 5, ptInner.y - 5, 1, cy+9, PATCOPY);
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PatBlt(hdc, ptInner.x - 5, ptInner.y - 5, cx+9, 1, PATCOPY);
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PatBlt(hdc, ptInner.x+cx, ptInner.y-1, 1, cy+2, PATCOPY);
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PatBlt(hdc, ptInner.x-1, ptInner.y+cy, cx, 1, PATCOPY);
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// fill bordered area with button face colour
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SelectObject(hdc, ghbrFace);
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PatBlt(hdc, ptInner.x-4, ptInner.y-4, cx+8, 3, PATCOPY);
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PatBlt(hdc, ptInner.x-4, ptInner.y+cy+1, cx+8, 3, PATCOPY);
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PatBlt(hdc, ptInner.x-4, ptInner.y-1, 3, cy+2, PATCOPY);
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PatBlt(hdc, ptInner.x+cx+1, ptInner.y-1, 3, cy+2, PATCOPY);
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SelectObject(hdc, hbr);
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EndPaint(hwnd, &ps);
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}
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/*
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* respond to a scrollbar message by moving the current scroll
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* position horizontally
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*/
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void
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vidframeHScroll(HWND hwnd, HWND hwndCap, int code, int pos)
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{
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POINT pt;
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int cmax, cmin;
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pt.x = GetScrollPos(hwnd, SB_HORZ);
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pt.y = GetScrollPos(hwnd, SB_VERT);
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GetScrollRange(hwnd, SB_HORZ, &cmin, &cmax);
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switch(code) {
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case SB_LINEUP:
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pt.x -= LINE_SCROLL;
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break;
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case SB_LINEDOWN:
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pt.x += LINE_SCROLL;
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break;
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case SB_PAGEUP:
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pt.x -= PAGE_SCROLL;
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break;
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case SB_PAGEDOWN:
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pt.x += PAGE_SCROLL;
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break;
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case SB_THUMBTRACK:
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case SB_THUMBPOSITION:
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pt.x = pos;
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break;
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}
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if (pt.x < cmin) {
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pt.x = cmin;
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} else if (pt.x > cmax) {
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pt.x = cmax;
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}
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SetScrollPos(hwnd, SB_HORZ, pt.x, TRUE);
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capSetScrollPos(hwndCap, &pt);
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}
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/*
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* respond to a scrollbar message by moving the current scroll
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* position vertically
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*/
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void
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vidframeVScroll(HWND hwnd, HWND hwndCap, int code, int pos)
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{
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POINT pt;
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int cmax, cmin;
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pt.x = GetScrollPos(hwnd, SB_HORZ);
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pt.y = GetScrollPos(hwnd, SB_VERT);
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GetScrollRange(hwnd, SB_VERT, &cmin, &cmax);
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switch(code) {
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case SB_LINEUP:
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pt.y -= LINE_SCROLL;
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break;
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case SB_LINEDOWN:
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pt.y += LINE_SCROLL;
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break;
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case SB_PAGEUP:
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pt.y -= PAGE_SCROLL;
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break;
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case SB_PAGEDOWN:
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pt.y += PAGE_SCROLL;
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break;
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case SB_THUMBTRACK:
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case SB_THUMBPOSITION:
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pt.y = pos;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pt.y < cmin) {
|
||
|
|
pt.y = cmin;
|
||
|
|
} else if (pt.y > cmax) {
|
||
|
|
pt.y = cmax;
|
||
|
|
}
|
||
|
|
SetScrollPos(hwnd, SB_VERT, pt.y, TRUE);
|
||
|
|
capSetScrollPos(hwndCap, &pt);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
LRESULT FAR PASCAL
|
||
|
|
vidframeProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
|
||
|
|
{
|
||
|
|
|
||
|
|
switch(message) {
|
||
|
|
|
||
|
|
case WM_MOVE:
|
||
|
|
case WM_SIZE:
|
||
|
|
if (ghWndCap) {
|
||
|
|
vidframeLayout(hwnd, ghWndCap);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case WM_SYSCOLORCHANGE:
|
||
|
|
// re-get brushes - we will be sent a paint message
|
||
|
|
vidframeDeleteTools();
|
||
|
|
vidframeCreateTools(hwnd);
|
||
|
|
return(TRUE);
|
||
|
|
|
||
|
|
|
||
|
|
case WM_PALETTECHANGED:
|
||
|
|
case WM_QUERYNEWPALETTE:
|
||
|
|
// allow the avicap window to handle this
|
||
|
|
if (ghWndCap) {
|
||
|
|
return SendMessage(ghWndCap, message, wParam, lParam) ;
|
||
|
|
}
|
||
|
|
|
||
|
|
case WM_PAINT:
|
||
|
|
if (ghWndCap) {
|
||
|
|
vidframePaint(hwnd, ghWndCap);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case WM_HSCROLL:
|
||
|
|
if (ghWndCap) {
|
||
|
|
vidframeHScroll(hwnd, ghWndCap,
|
||
|
|
GET_WM_HSCROLL_CODE(wParam, lParam),
|
||
|
|
GET_WM_HSCROLL_POS(wParam, lParam)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case WM_VSCROLL:
|
||
|
|
if (ghWndCap) {
|
||
|
|
vidframeVScroll(hwnd, ghWndCap,
|
||
|
|
GET_WM_VSCROLL_CODE(wParam, lParam),
|
||
|
|
GET_WM_VSCROLL_POS(wParam, lParam)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case WM_DESTROY:
|
||
|
|
vidframeDeleteTools();
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return(DefWindowProc(hwnd, message, wParam, lParam));
|
||
|
|
|
||
|
|
}
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* create a frame window and child capture window at the
|
||
|
|
* given location. Initialise the class if this is the
|
||
|
|
* first time through.
|
||
|
|
*
|
||
|
|
* returns the window handle of the frame window
|
||
|
|
* (or NULL if failure). returns the window handle of the AVICAP window
|
||
|
|
* via phwndCap.
|
||
|
|
*/
|
||
|
|
HWND
|
||
|
|
vidframeCreate(
|
||
|
|
HWND hwndParent,
|
||
|
|
HINSTANCE hInstance,
|
||
|
|
HINSTANCE hPrevInstance,
|
||
|
|
int x,
|
||
|
|
int y,
|
||
|
|
int cx,
|
||
|
|
int cy,
|
||
|
|
HWND FAR * phwndCap
|
||
|
|
)
|
||
|
|
{
|
||
|
|
HWND hwnd, hwndCap;
|
||
|
|
static BOOL bInitDone = FALSE;
|
||
|
|
|
||
|
|
if (!bInitDone) {
|
||
|
|
WNDCLASS wc;
|
||
|
|
|
||
|
|
vidframeCreateTools(NULL);
|
||
|
|
|
||
|
|
if (!hPrevInstance) {
|
||
|
|
// If it's the first instance, register the window class
|
||
|
|
wc.lpszClassName = VIDFRAMECLASSNAME;
|
||
|
|
wc.hInstance = hInstance;
|
||
|
|
wc.lpfnWndProc = vidframeProc;
|
||
|
|
wc.hCursor = LoadCursor(NULL, IDC_ARROW) ;
|
||
|
|
wc.hIcon = NULL;
|
||
|
|
wc.lpszMenuName = NULL;
|
||
|
|
wc.hbrBackground = ghbrBackground;
|
||
|
|
wc.style = CS_HREDRAW | CS_VREDRAW ;
|
||
|
|
wc.cbClsExtra = 0 ;
|
||
|
|
wc.cbWndExtra = 0 ;
|
||
|
|
|
||
|
|
if(!RegisterClass(&wc)) {
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
bInitDone = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
hwnd = CreateWindowEx(
|
||
|
|
gfIsRTL ? WS_EX_LEFTSCROLLBAR | WS_EX_RIGHT | WS_EX_RTLREADING : 0,
|
||
|
|
VIDFRAMECLASSNAME,
|
||
|
|
NULL,
|
||
|
|
WS_CHILD|WS_VISIBLE|WS_HSCROLL|WS_VSCROLL|WS_CLIPCHILDREN,
|
||
|
|
x, y, cx, cy,
|
||
|
|
hwndParent,
|
||
|
|
(HMENU) 0,
|
||
|
|
hInstance,
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
if (hwnd == NULL) {
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* create an AVICAP window within this window. Leave vidframeLayout
|
||
|
|
* to do the layout
|
||
|
|
*/
|
||
|
|
hwndCap = capCreateCaptureWindow(
|
||
|
|
NULL,
|
||
|
|
WS_CHILD | WS_VISIBLE,
|
||
|
|
0, 0, 160, 120,
|
||
|
|
hwnd, // parent window
|
||
|
|
1 // child window id
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
if (hwndCap == NULL) {
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
*phwndCap = hwndCap;
|
||
|
|
return(hwnd);
|
||
|
|
}
|
||
|
|
|