2001-11-07 23:48:17 +00:00
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/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: Layout.cpp
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*
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* created on: 08/03/2000
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* created by: Eric R. Mader
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*/
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#include <windows.h>
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//#include "LETypes.h"
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//#include "LEFontInstance.h"
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//#include "LayoutEngine.h"
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//#include "unicode/loengine.h"
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#include "unicode/uscript.h"
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//#include "LEScripts.h"
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#include "GDIFontInstance.h"
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#include "paragraph.h"
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#include "GDIGUISupport.h"
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#include "GDIFontMap.h"
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#include "UnicodeReader.h"
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#include "scrptrun.h"
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#define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
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LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
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{
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HWND hwnd;
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MSG msg;
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WNDCLASS wndclass;
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TCHAR szAppName[] = TEXT("LayoutDemo");
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TCHAR szTitle[] = TEXT("LayoutDemo: Demo of LayoutEngine");
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RFIErrorCode status = RFI_NO_ERROR;
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wndclass.style = CS_HREDRAW | CS_VREDRAW;
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wndclass.lpfnWndProc = WndProc;
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wndclass.cbClsExtra = 0;
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wndclass.cbWndExtra = sizeof(LONG);
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wndclass.hInstance = hInstance;
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wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
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wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
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wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
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wndclass.lpszMenuName = NULL;
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wndclass.lpszClassName = szAppName;
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if (!RegisterClass(&wndclass)) {
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MessageBox(NULL, TEXT("This demo only runs on Windows 2000!"), szAppName, MB_ICONERROR);
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return 0;
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}
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hwnd = CreateWindow(szAppName, szTitle,
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WS_OVERLAPPEDWINDOW | WS_VSCROLL,
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CW_USEDEFAULT, CW_USEDEFAULT,
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600, 400,
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NULL, NULL, hInstance, NULL);
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ShowWindow(hwnd, iCmdShow);
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UpdateWindow(hwnd);
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while (GetMessage(&msg, NULL, 0, 0)) {
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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return msg.wParam;
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}
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LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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{
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HDC hdc;
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Paragraph *paragraph;
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static le_int32 windowCount = 0;
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static GDIFontMap *fontMap = NULL;
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static GDIGUISupport *guiSupport = new GDIGUISupport();
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switch (message) {
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case WM_CREATE:
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{
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RFIErrorCode fontStatus = RFI_NO_ERROR;
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hdc = GetDC(hwnd);
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fontMap = new GDIFontMap(hdc, "FontMap.GDI", 24, guiSupport, fontStatus);
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if (LE_FAILURE(fontStatus)) {
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ReleaseDC(hwnd, hdc);
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return 0;
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}
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2001-11-08 00:40:20 +00:00
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paragraph = Paragraph::paragraphFactory("Sample.txt", fontMap, guiSupport, hdc);
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2001-11-07 23:48:17 +00:00
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SetWindowLong(hwnd, 0, (LONG) paragraph);
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windowCount += 1;
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ReleaseDC(hwnd, hdc);
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return 0;
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}
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case WM_SIZE:
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{
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le_int32 width = LOWORD(lParam);
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le_int32 height = HIWORD(lParam);
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SCROLLINFO si;
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paragraph = (Paragraph *) GetWindowLong(hwnd, 0);
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if (paragraph != NULL) {
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// FIXME: does it matter what we put in the ScrollInfo
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// if the window's been minimized?
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if (width > 0 && height > 0) {
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paragraph->breakLines(width, height);
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}
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si.cbSize = sizeof si;
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si.fMask = SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL;
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si.nMin = 0;
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si.nMax = paragraph->getLineCount() - 1;
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si.nPage = height / paragraph->getLineHeight();
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SetScrollInfo(hwnd, SB_VERT, &si, true);
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}
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return 0;
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}
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case WM_VSCROLL:
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{
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SCROLLINFO si;
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le_int32 vertPos;
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si.cbSize = sizeof si;
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si.fMask = SIF_ALL;
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GetScrollInfo(hwnd, SB_VERT, &si);
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vertPos = si.nPos;
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switch (LOWORD(wParam))
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{
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case SB_TOP:
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si.nPos = si.nMin;
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break;
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case SB_BOTTOM:
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si.nPos = si.nMax;
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break;
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case SB_LINEUP:
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si.nPos -= 1;
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break;
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case SB_LINEDOWN:
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si.nPos += 1;
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break;
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case SB_PAGEUP:
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si.nPos -= si.nPage;
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break;
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case SB_PAGEDOWN:
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si.nPos += si.nPage;
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break;
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case SB_THUMBTRACK:
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si.nPos = si.nTrackPos;
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break;
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default:
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break;
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}
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si.fMask = SIF_POS;
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SetScrollInfo(hwnd, SB_VERT, &si, true);
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GetScrollInfo(hwnd, SB_VERT, &si);
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paragraph = (Paragraph *) GetWindowLong(hwnd, 0);
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if (paragraph != NULL && si.nPos != vertPos) {
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ScrollWindow(hwnd, 0, paragraph->getLineHeight() * (vertPos - si.nPos), NULL, NULL);
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UpdateWindow(hwnd);
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}
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return 0;
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}
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case WM_PAINT:
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{
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PAINTSTRUCT ps;
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SCROLLINFO si;
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le_int32 firstLine, lastLine;
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hdc = BeginPaint(hwnd, &ps);
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si.cbSize = sizeof si;
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si.fMask = SIF_ALL;
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GetScrollInfo(hwnd, SB_VERT, &si);
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firstLine = si.nPos;
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paragraph = (Paragraph *) GetWindowLong(hwnd, 0);
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if (paragraph != NULL) {
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// NOTE: si.nPos + si.nPage may include a partial line at the bottom
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// of the window. We need this because scrolling assumes that the
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// partial line has been painted.
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lastLine = min (si.nPos + (le_int32) si.nPage, paragraph->getLineCount() - 1);
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paragraph->draw(hdc, firstLine, lastLine);
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}
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EndPaint(hwnd, &ps);
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return 0;
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}
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case WM_DESTROY:
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{
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paragraph = (Paragraph *) GetWindowLong(hwnd, 0);
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if (paragraph != NULL) {
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delete paragraph;
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}
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if (--windowCount <= 0) {
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delete fontMap;
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PostQuitMessage(0);
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}
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return 0;
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}
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default:
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return DefWindowProc(hwnd, message, wParam, lParam);
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}
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return 0;
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}
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