359 lines
9.5 KiB
C++
359 lines
9.5 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2007, 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 <stdio.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 "ScriptCompositeFontInstance.h"
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#include "resource.h"
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#define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
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struct Context
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{
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le_int32 width;
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le_int32 height;
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Paragraph *paragraph;
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};
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LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
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#define APP_NAME "LayoutSample"
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TCHAR szAppName[] = TEXT(APP_NAME);
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void PrettyTitle(HWND hwnd, char *fileName)
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{
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char title[MAX_PATH + 64];
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sprintf(title, "%s - %s", APP_NAME, fileName);
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SetWindowTextA(hwnd, title);
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}
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void InitParagraph(HWND hwnd, Context *context)
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{
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SCROLLINFO si;
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if (context->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 (context->width > 0 && context->height > 0) {
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context->paragraph->breakLines(context->width, context->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 = context->paragraph->getLineCount() - 1;
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si.nPage = context->height / context->paragraph->getLineHeight();
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SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
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}
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}
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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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HACCEL hAccel;
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MSG msg;
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WNDCLASS wndclass;
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LEErrorCode status = LE_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 = szAppName;
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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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hAccel = LoadAccelerators(hInstance, szAppName);
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hwnd = CreateWindow(szAppName, NULL,
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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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if (!TranslateAccelerator(hwnd, hAccel, &msg)) {
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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UnregisterClass(szAppName, hInstance);
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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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Context *context;
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static le_int32 windowCount = 0;
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static GDIFontMap *fontMap = NULL;
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static GDISurface *surface = NULL;
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static GDIGUISupport *guiSupport = new GDIGUISupport();
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static ScriptCompositeFontInstance *font = NULL;
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switch (message) {
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case WM_CREATE:
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{
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LEErrorCode fontStatus = LE_NO_ERROR;
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hdc = GetDC(hwnd);
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surface = new GDISurface(hdc);
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fontMap = new GDIFontMap(surface, "FontMap.GDI", 24, guiSupport, fontStatus);
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font = new ScriptCompositeFontInstance(fontMap);
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if (LE_FAILURE(fontStatus)) {
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ReleaseDC(hwnd, hdc);
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return -1;
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}
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context = new Context();
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context->width = 600;
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context->height = 400;
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context->paragraph = Paragraph::paragraphFactory("Sample.txt", font, guiSupport);
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SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) context);
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windowCount += 1;
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ReleaseDC(hwnd, hdc);
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PrettyTitle(hwnd, "Sample.txt");
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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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context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
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context->width = LOWORD(lParam);
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context->height = HIWORD(lParam);
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InitParagraph(hwnd, context);
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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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context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
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if (context->paragraph != NULL && si.nPos != vertPos) {
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ScrollWindow(hwnd, 0, context->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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SetBkMode(hdc, TRANSPARENT);
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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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context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
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if (context->paragraph != NULL) {
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surface->setHDC(hdc);
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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, context->paragraph->getLineCount() - 1);
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context->paragraph->draw(surface, 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_COMMAND:
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switch (LOWORD(wParam)) {
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case IDM_FILE_OPEN:
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{
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OPENFILENAMEA ofn;
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char szFileName[MAX_PATH], szTitleName[MAX_PATH];
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static char szFilter[] = "Text Files (.txt)\0*.txt\0"
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"All Files (*.*)\0*.*\0\0";
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ofn.lStructSize = sizeof (OPENFILENAMEA);
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ofn.hwndOwner = hwnd;
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ofn.hInstance = NULL;
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ofn.lpstrFilter = szFilter;
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ofn.lpstrCustomFilter = NULL;
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ofn.nMaxCustFilter = 0;
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ofn.nFilterIndex = 0;
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ofn.lpstrFile = szFileName;
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ofn.nMaxFile = MAX_PATH;
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ofn.lpstrFileTitle = szTitleName;
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ofn.nMaxFileTitle = MAX_PATH;
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ofn.lpstrInitialDir = NULL;
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ofn.lpstrTitle = NULL;
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ofn.Flags = OFN_HIDEREADONLY | OFN_PATHMUSTEXIST;
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ofn.nFileOffset = 0;
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ofn.nFileExtension = 0;
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ofn.lpstrDefExt = "txt";
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ofn.lCustData = 0L;
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ofn.lpfnHook = NULL;
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ofn.lpTemplateName = NULL;
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szFileName[0] = '\0';
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if (GetOpenFileNameA(&ofn)) {
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hdc = GetDC(hwnd);
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surface->setHDC(hdc);
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Paragraph *newParagraph = Paragraph::paragraphFactory(szFileName, font, guiSupport);
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if (newParagraph != NULL) {
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context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
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if (context->paragraph != NULL) {
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delete context->paragraph;
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}
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context->paragraph = newParagraph;
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InitParagraph(hwnd, context);
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PrettyTitle(hwnd, szTitleName);
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InvalidateRect(hwnd, NULL, TRUE);
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}
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}
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//ReleaseDC(hwnd, hdc);
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return 0;
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}
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case IDM_FILE_EXIT:
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case IDM_FILE_CLOSE:
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SendMessage(hwnd, WM_CLOSE, 0, 0);
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return 0;
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case IDM_HELP_ABOUTLAYOUTSAMPLE:
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MessageBox(hwnd, TEXT("Windows Layout Sample 0.1\n")
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TEXT("Copyright (C) 1998-2005 By International Business Machines Corporation and others.\n")
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TEXT("Author: Eric Mader"),
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szAppName, MB_ICONINFORMATION | MB_OK);
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return 0;
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}
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break;
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case WM_DESTROY:
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{
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context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
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if (context != NULL && context->paragraph != NULL) {
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delete context->paragraph;
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}
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delete context;
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if (--windowCount <= 0) {
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delete font;
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delete surface;
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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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