481 lines
13 KiB
C
481 lines
13 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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preview.c
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Abstract:
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This module contains the code for console preview window
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Author:
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Therese Stowell (thereses) Feb-3-1992 (swiped from Win3.1)
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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/* ----- Equates ----- */
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#define PREVIEW_HSCROLL 0x01
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#define PREVIEW_VSCROLL 0x02
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/* ----- Prototypes ----- */
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void AspectPoint(
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RECT* rectPreview,
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POINT* pt);
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LONG AspectScale(
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LONG n1,
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LONG n2,
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LONG m);
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/* ----- Globals ----- */
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POINT NonClientSize;
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RECT WindowRect;
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DWORD PreviewFlags;
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VOID
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UpdatePreviewRect(VOID)
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/*++
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Update the global window size and dimensions
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--*/
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{
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POINT MinSize;
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POINT MaxSize;
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POINT WindowSize;
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PFONT_INFO lpFont;
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HMONITOR hMonitor;
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MONITORINFO mi;
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/*
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* Get the font pointer
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*/
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lpFont = &FontInfo[CurrentFontIndex];
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/*
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* Get the window size
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*/
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MinSize.x = (GetSystemMetrics(SM_CXMIN)-NonClientSize.x) / lpFont->Size.X;
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MinSize.y = (GetSystemMetrics(SM_CYMIN)-NonClientSize.y) / lpFont->Size.Y;
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MaxSize.x = GetSystemMetrics(SM_CXFULLSCREEN) / lpFont->Size.X;
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MaxSize.y = GetSystemMetrics(SM_CYFULLSCREEN) / lpFont->Size.Y;
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WindowSize.x = max(MinSize.x, min(MaxSize.x, gpStateInfo->WindowSize.X));
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WindowSize.y = max(MinSize.y, min(MaxSize.y, gpStateInfo->WindowSize.Y));
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/*
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* Get the window rectangle, making sure it's at least twice the
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* size of the non-client area.
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*/
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WindowRect.left = gpStateInfo->WindowPosX;
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WindowRect.top = gpStateInfo->WindowPosY;
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WindowRect.right = WindowSize.x * lpFont->Size.X + NonClientSize.x;
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if (WindowRect.right < NonClientSize.x * 2) {
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WindowRect.right = NonClientSize.x * 2;
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}
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WindowRect.right += WindowRect.left;
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WindowRect.bottom = WindowSize.y * lpFont->Size.Y + NonClientSize.y;
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if (WindowRect.bottom < NonClientSize.y * 2) {
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WindowRect.bottom = NonClientSize.y * 2;
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}
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WindowRect.bottom += WindowRect.top;
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/*
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* Get information about the monitor we're on
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*/
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hMonitor = MonitorFromRect(&WindowRect, MONITOR_DEFAULTTONEAREST);
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mi.cbSize = sizeof(mi);
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GetMonitorInfo(hMonitor, &mi);
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gcxScreen = mi.rcWork.right - mi.rcWork.left;
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gcyScreen = mi.rcWork.bottom - mi.rcWork.top;
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/*
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* Convert window rectangle to monitor relative coordinates
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*/
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WindowRect.right -= WindowRect.left;
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WindowRect.left -= mi.rcWork.left;
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WindowRect.bottom -= WindowRect.top;
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WindowRect.top -= mi.rcWork.top;
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/*
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* Update the display flags
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*/
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if (WindowSize.x < gpStateInfo->ScreenBufferSize.X) {
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PreviewFlags |= PREVIEW_HSCROLL;
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} else {
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PreviewFlags &= ~PREVIEW_HSCROLL;
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}
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if (WindowSize.y < gpStateInfo->ScreenBufferSize.Y) {
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PreviewFlags |= PREVIEW_VSCROLL;
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} else {
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PreviewFlags &= ~PREVIEW_VSCROLL;
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}
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}
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VOID
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InvalidatePreviewRect(HWND hWnd)
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/*++
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Invalidate the area covered by the preview "window"
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--*/
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{
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RECT rectWin;
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RECT rectPreview;
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/*
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* Get the size of the preview "screen"
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*/
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GetClientRect(hWnd, &rectPreview);
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/*
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* Get the dimensions of the preview "window" and scale it to the
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* preview "screen"
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*/
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rectWin.left = WindowRect.left;
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rectWin.top = WindowRect.top;
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rectWin.right = WindowRect.left + WindowRect.right;
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rectWin.bottom = WindowRect.top + WindowRect.bottom;
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AspectPoint(&rectPreview, (POINT*)&rectWin.left);
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AspectPoint(&rectPreview, (POINT*)&rectWin.right);
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/*
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* Invalidate the area covered by the preview "window"
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*/
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InvalidateRect(hWnd, &rectWin, FALSE);
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}
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VOID
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PreviewPaint(
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PAINTSTRUCT* pPS,
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HWND hWnd
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)
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/*++
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Paints the font preview. This is called inside the paint message
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handler for the preview window
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--*/
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{
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RECT rectWin;
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RECT rectPreview;
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HBRUSH hbrFrame;
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HBRUSH hbrTitle;
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HBRUSH hbrOld;
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HBRUSH hbrClient;
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HBRUSH hbrBorder;
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HBRUSH hbrButton;
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HBRUSH hbrScroll;
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HBRUSH hbrDesktop;
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POINT ptButton;
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POINT ptScroll;
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HDC hDC;
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HBITMAP hBitmap;
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HBITMAP hBitmapOld;
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COLORREF rgbClient;
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/*
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* Get the size of the preview "screen"
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*/
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GetClientRect(hWnd, &rectPreview);
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/*
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* Get the dimensions of the preview "window" and scale it to the
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* preview "screen"
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*/
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rectWin = WindowRect;
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AspectPoint(&rectPreview, (POINT*)&rectWin.left);
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AspectPoint(&rectPreview, (POINT*)&rectWin.right);
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/*
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* Compute the dimensions of some other window components
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*/
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ptButton.x = GetSystemMetrics(SM_CXSIZE);
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ptButton.y = GetSystemMetrics(SM_CYSIZE);
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AspectPoint(&rectPreview, &ptButton);
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ptButton.y *= 2; /* Double the computed size for "looks" */
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ptScroll.x = GetSystemMetrics(SM_CXVSCROLL);
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ptScroll.y = GetSystemMetrics(SM_CYHSCROLL);
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AspectPoint(&rectPreview, &ptScroll);
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/*
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* Create the memory device context
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*/
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hDC = CreateCompatibleDC(pPS->hdc);
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hBitmap = CreateCompatibleBitmap(pPS->hdc,
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rectPreview.right,
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rectPreview.bottom);
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hBitmapOld = SelectObject(hDC, hBitmap);
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/*
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* Create the brushes
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*/
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hbrBorder = CreateSolidBrush(GetSysColor(COLOR_ACTIVEBORDER));
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hbrTitle = CreateSolidBrush(GetSysColor(COLOR_ACTIVECAPTION));
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hbrFrame = CreateSolidBrush(GetSysColor(COLOR_WINDOWFRAME));
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hbrButton = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));
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hbrScroll = CreateSolidBrush(GetSysColor(COLOR_SCROLLBAR));
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hbrDesktop = CreateSolidBrush(GetSysColor(COLOR_BACKGROUND));
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rgbClient = GetNearestColor(hDC, ScreenBkColor(gpStateInfo));
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hbrClient = CreateSolidBrush(rgbClient);
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/*
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* Erase the clipping area
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*/
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FillRect(hDC, &(pPS->rcPaint), hbrDesktop);
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/*
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* Fill in the whole window with the client brush
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*/
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hbrOld = SelectObject(hDC, hbrClient);
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PatBlt(hDC, rectWin.left, rectWin.top,
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rectWin.right - 1, rectWin.bottom - 1, PATCOPY);
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/*
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* Fill in the caption bar
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*/
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SelectObject(hDC, hbrTitle);
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PatBlt(hDC, rectWin.left + 3, rectWin.top + 3,
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rectWin.right - 7, ptButton.y - 2, PATCOPY);
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/*
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* Draw the "buttons"
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*/
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SelectObject(hDC, hbrButton);
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PatBlt(hDC, rectWin.left + 3, rectWin.top + 3,
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ptButton.x, ptButton.y - 2, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - ptButton.x,
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rectWin.top + 3,
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ptButton.x, ptButton.y - 2, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - 2 * ptButton.x - 1,
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rectWin.top + 3,
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ptButton.x, ptButton.y - 2, PATCOPY);
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SelectObject(hDC, hbrFrame);
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PatBlt(hDC, rectWin.left + 3 + ptButton.x, rectWin.top + 3,
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1, ptButton.y - 2, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - ptButton.x - 1,
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rectWin.top + 3,
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1, ptButton.y - 2, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - 2 * ptButton.x - 2,
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rectWin.top + 3,
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1, ptButton.y - 2, PATCOPY);
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/*
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* Draw the scrollbars
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*/
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SelectObject(hDC, hbrScroll);
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if (PreviewFlags & PREVIEW_HSCROLL) {
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PatBlt(hDC, rectWin.left + 3,
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rectWin.top + rectWin.bottom - 4 - ptScroll.y,
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rectWin.right - 7, ptScroll.y, PATCOPY);
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}
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if (PreviewFlags & PREVIEW_VSCROLL) {
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - ptScroll.x,
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rectWin.top + 1 + ptButton.y + 1,
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ptScroll.x, rectWin.bottom - 6 - ptButton.y, PATCOPY);
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if (PreviewFlags & PREVIEW_HSCROLL) {
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SelectObject(hDC, hbrFrame);
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PatBlt(hDC, rectWin.left + rectWin.right - 5 - ptScroll.x,
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rectWin.top + rectWin.bottom - 4 - ptScroll.y,
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1, ptScroll.y, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4 - ptScroll.x,
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rectWin.top + rectWin.bottom - 5 - ptScroll.y,
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ptScroll.x, 1, PATCOPY);
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}
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}
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/*
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* Draw the interior window frame and caption frame
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*/
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SelectObject(hDC, hbrFrame);
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PatBlt(hDC, rectWin.left + 2, rectWin.top + 2,
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1, rectWin.bottom - 5, PATCOPY);
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PatBlt(hDC, rectWin.left + 2, rectWin.top + 2,
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rectWin.right - 5, 1, PATCOPY);
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PatBlt(hDC, rectWin.left + 2, rectWin.top + rectWin.bottom - 4,
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rectWin.right - 5, 1, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 4, rectWin.top + 2,
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1, rectWin.bottom - 5, PATCOPY);
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PatBlt(hDC, rectWin.left + 2, rectWin.top + 1 + ptButton.y,
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rectWin.right - 5, 1, PATCOPY);
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/*
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* Draw the border
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*/
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SelectObject(hDC, hbrBorder);
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PatBlt(hDC, rectWin.left + 1, rectWin.top + 1,
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1, rectWin.bottom - 3, PATCOPY);
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PatBlt(hDC, rectWin.left + 1, rectWin.top + 1,
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rectWin.right - 3, 1, PATCOPY);
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PatBlt(hDC, rectWin.left + 1, rectWin.top + rectWin.bottom - 3,
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rectWin.right - 3, 1, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 3, rectWin.top + 1,
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1, rectWin.bottom - 3, PATCOPY);
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/*
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* Draw the exterior window frame
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*/
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SelectObject(hDC, hbrFrame);
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PatBlt(hDC, rectWin.left, rectWin.top,
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1, rectWin.bottom - 1, PATCOPY);
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PatBlt(hDC, rectWin.left, rectWin.top,
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rectWin.right - 1, 1, PATCOPY);
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PatBlt(hDC, rectWin.left, rectWin.top + rectWin.bottom - 2,
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rectWin.right - 1, 1, PATCOPY);
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PatBlt(hDC, rectWin.left + rectWin.right - 2, rectWin.top,
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1, rectWin.bottom - 1, PATCOPY);
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/*
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* Copy the memory device context to the screen device context
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*/
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BitBlt(pPS->hdc, 0, 0, rectPreview.right, rectPreview.bottom,
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hDC, 0, 0, SRCCOPY);
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/*
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* Clean up everything
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*/
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SelectObject(hDC, hbrOld);
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SelectObject(hDC, hBitmapOld);
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DeleteObject(hbrBorder);
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DeleteObject(hbrFrame);
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DeleteObject(hbrTitle);
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DeleteObject(hbrClient);
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DeleteObject(hbrButton);
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DeleteObject(hbrScroll);
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DeleteObject(hbrDesktop);
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DeleteObject(hBitmap);
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DeleteDC(hDC);
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}
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LRESULT
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PreviewWndProc(
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HWND hWnd,
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UINT wMessage,
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WPARAM wParam,
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LPARAM lParam
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)
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/*
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* PreviewWndProc
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* Handles the preview window
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*/
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{
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PAINTSTRUCT ps;
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LPCREATESTRUCT lpcs;
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RECT rcWindow;
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int cx;
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int cy;
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switch (wMessage) {
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case WM_CREATE:
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/*
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* Figure out space used by non-client area
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*/
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SetRect(&rcWindow, 0, 0, 50, 50);
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AdjustWindowRect(&rcWindow, WS_OVERLAPPEDWINDOW, FALSE);
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NonClientSize.x = rcWindow.right - rcWindow.left - 50;
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NonClientSize.y = rcWindow.bottom - rcWindow.top - 50;
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/*
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* Compute the size of the preview "window"
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*/
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UpdatePreviewRect();
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/*
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* Scale the window so it has the same aspect ratio as the screen
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*/
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lpcs = (LPCREATESTRUCT)lParam;
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cx = lpcs->cx;
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cy = AspectScale(gcyScreen, gcxScreen, cx);
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if (cy > lpcs->cy) {
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cy = lpcs->cy;
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cx = AspectScale(gcxScreen, gcyScreen, cy);
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}
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MoveWindow(hWnd, lpcs->x, lpcs->y, cx, cy, TRUE);
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break;
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case WM_PAINT:
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BeginPaint(hWnd, &ps);
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PreviewPaint(&ps, hWnd);
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EndPaint(hWnd, &ps);
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break;
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case CM_PREVIEW_UPDATE:
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InvalidatePreviewRect(hWnd);
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UpdatePreviewRect();
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/*
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* Make sure the preview "screen" has the correct aspect ratio
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*/
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GetWindowRect(hWnd, &rcWindow);
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cx = rcWindow.right - rcWindow.left;
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cy = AspectScale(gcyScreen, gcxScreen, cx);
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if (cy != rcWindow.bottom - rcWindow.top) {
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SetWindowPos(hWnd, NULL, 0, 0, cx, cy, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOZORDER);
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}
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InvalidatePreviewRect(hWnd);
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break;
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default:
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return DefWindowProc(hWnd, wMessage, wParam, lParam);
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}
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return 0L;
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}
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/* AspectScale
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* Performs the following calculation in LONG arithmetic to avoid
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* overflow:
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* return = n1 * m / n2
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* This can be used to make an aspect ration calculation where n1/n2
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* is the aspect ratio and m is a known value. The return value will
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* be the value that corresponds to m with the correct apsect ratio.
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*/
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LONG AspectScale(
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LONG n1,
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LONG n2,
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LONG m)
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{
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LONG Temp;
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Temp = n1 * m + (n2 >> 1);
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return Temp / n2;
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}
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/* AspectPoint
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* Scales a point to be preview-sized instead of screen-sized.
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*/
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void AspectPoint(
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RECT* rectPreview,
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POINT* pt)
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{
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pt->x = AspectScale(rectPreview->right, gcxScreen, pt->x);
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pt->y = AspectScale(rectPreview->bottom, gcyScreen, pt->y);
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}
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