PreviewRichEdit Sample (C)
This sample illustrates RichEdit control output.
The source code is located at C:\Program Files (x86)\Softelvdm\SftPrintPreview DLL 2.0\Samples\C\PreviewRichEdit\PreviewRichEdit.c or C:\Program Files\Softelvdm\SftPrintPreview DLL 2.0\Samples\C\PreviewRichEdit\PreviewRichEdit.c (on 32-bit Windows versions).
#include <windows.h>
#include <stdlib.h>
#include <Richedit.h>
#include <crtdbg.h>
#include "SftPrintPreview.h" /* SftPrintPreview/DLL Header File */
#include "resource.h"
/**********************************************************************/
/* Globals */
/**********************************************************************/
HINSTANCE g_hInst; // App Instance Handle
HWND m_hwndRichEdit; // Richedit Window
/**********************************************************************/
/* Center the main dialog */
/**********************************************************************/
static void CenterWindow(HWND hwnd)
{
RECT rc;
RECT rcOwner;
int x, y;
GetWindowRect(hwnd, &rc);
GetWindowRect(GetDesktopWindow(), &rcOwner);
// Calculate the starting x,y for the new window so that it would be centered.
x = rcOwner.left + (((rcOwner.right - rcOwner.left) - (rc.right - rc.left)) / 2);
y = rcOwner.top + (((rcOwner.bottom - rcOwner.top) - (rc.bottom - rc.top)) / 2);
SetWindowPos(hwnd, NULL, x, y, 0, 0, SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOZORDER);
}
/**********************************************************************/
/* Load RichEdit Window */
/**********************************************************************/
DWORD CALLBACK EditStreamCallback(SFTPRINTPREVIEW_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
HANDLE hFile = (HANDLE) dwCookie;
DWORD dwdRead = 0;
if (ReadFile(hFile, pbBuff, cb, &dwdRead, NULL)) {
//_ASSERT(cb == dwdRead);
*pcb = dwdRead;
return 0;
}
return -1;
}
void LoadEditControlWithFile(HWND hwndDlg, LPCTSTR lpszFileName)
{
HANDLE hFile = CreateFile(lpszFileName, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile != INVALID_HANDLE_VALUE) {
EDITSTREAM es;
HWND hwndRichEdit = GetDlgItem(hwndDlg, IDC_RICHEDIT);
HCURSOR oldCursor = SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_WAIT)));
SetWindowText(hwndRichEdit, TEXT("Loading ..."));
ShowWindow(GetParent(hwndRichEdit), SW_SHOW);
UpdateWindow(GetParent(hwndRichEdit));
es.dwCookie = (SFTPRINTPREVIEW_DWORD_PTR) hFile; // use our file handle as cookie
es.dwError = 0;
es.pfnCallback = EditStreamCallback;
SendMessage(hwndRichEdit, EM_STREAMIN, SF_RTF, (LPARAM)&es); // load file
CloseHandle(hFile);
SetCursor(oldCursor);
}
}
void LoadEditControl(HWND hwndDlg)
{
TCHAR szFile[_MAX_PATH] = TEXT("");
OPENFILENAME ofn;
memset(&ofn, 0, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = hwndDlg;
ofn.lpstrFilter = TEXT("RTF Files (*.rtf)\0*.rtf\0\0");
ofn.lpstrFile = szFile;
ofn.nMaxFile = sizeof(szFile)/sizeof(TCHAR);
ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_PATHMUSTEXIST;
if (GetOpenFileName(&ofn))
LoadEditControlWithFile(hwndDlg, szFile);
else {
DWORD dwd = CommDlgExtendedError();
if (dwd != 0)
_ASSERT(0);
}
}
/**********************************************************************/
/* Initialize Preview Window */
/**********************************************************************/
void InitPreviewWindow(HWND hwndCtl)
{
// retrieve current control settings
SFTPRINTPREVIEW_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTPRINTPREVIEW_CONTROL);
if (!SftPrintPreview_GetControlInfo(hwndCtl, &Ctl)) {
_ASSERT(0); // the SFTPRINTPREVIEW_CONTROL structure's cbSize member wasn't initialized properly
return;
}
// set all desired options
Ctl.fCenterOnClick = FALSE;
Ctl.fDragPage = TRUE;
Ctl.iZoomStyle = SFTPRINTPREVIEW_ZOOMSTYLE_BOTHBUTTONS_EXACT;
Ctl.numPageRows = 1; // default to 1x2 pages
Ctl.numPageGroups = 2;
Ctl.zoom = 0; // start out with multiple pages
lstrcpy(Ctl.szOutputName, TEXT("SftPrintPreview RichEdit Output")); // job name when printing
lstrcpy(Ctl.szHeaderRight, TEXT("SftPrintPreview/DLL RichEdit Preview Sample"));
lstrcpy(Ctl.szFooterLeft, TEXT("www.softelvdm.com"));
if (!SftPrintPreview_SetControlInfo(hwndCtl, &Ctl)) {
int errorValue = Ctl.errorValue;
_ASSERT(0); // an error occurred, check errorValue for error code
return;
}
}
void DefineContents(HWND hwndCtl)
{
SFTPRINTPREVIEW_CONTROL Ctl;
Ctl.cbSize = sizeof(SFTPRINTPREVIEW_CONTROL);
if (!SftPrintPreview_GetControlInfo(hwndCtl, &Ctl)) {
_ASSERT(0); // the SFTPRINTPREVIEW_CONTROL structure's cbSize member wasn't initialized properly
return;
}
// define desired contents to preview/print
Ctl.lpDrawPageWorkArea = (SFTPRINTPREVIEW_DWORD_PTR) NULL;// no workarea needed
Ctl.lpDrawInfoProc = SftPrintPreview_RenderRicheditWindow_Callback;// callback needed for RichEdit control
Ctl.hwndContent = m_hwndRichEdit; // We'll use this window
Ctl.hwndData = NULL; // no data window (content window is data window)
Ctl.iContentSizing = SFTPRINTPREVIEW_CONTENTSIZING_SHRINKTOFIT;// shrink to fit on page
if (!SftPrintPreview_SetControlInfo(hwndCtl, &Ctl)) {
int errorValue = Ctl.errorValue;
_ASSERT(0); // an error occurred, check errorValue for error codes
return;
}
}
/**********************************************************************/
/* Preview Dialog Proc */
/**********************************************************************/
BOOL CALLBACK PreviewDialogProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg) {
case WM_INITDIALOG: {
// Center this dialog
CenterWindow(hwndDlg);
// make sure main dialog has a sizing box
SetWindowLong(hwndDlg, GWL_STYLE, GetWindowLong(hwndDlg, GWL_STYLE) | WS_SIZEBOX);
ShowWindow(hwndDlg, SW_SHOWMAXIMIZED);
// Initialize Preview Window
InitPreviewWindow(GetDlgItem(hwndDlg, IDC_PREVIEW));
DefineContents(GetDlgItem(hwndDlg, IDC_PREVIEW));
// changing window styles above has suppressed setfocus call
SetFocus(GetDlgItem(hwndDlg, IDC_PREVIEW));
return FALSE;
}
case WM_DESTROY:
break;
case WM_COMMAND: {
HWND hwndCtl = (HWND) lParam;
int id = LOWORD(wParam);
int code = HIWORD(wParam);
if (hwndCtl) {
switch (id) {
case IDOK:
case IDCANCEL:
if (code == BN_CLICKED)
SendMessage(hwndDlg, WM_COMMAND, id, 0);
break;
case IDC_PREVIEW:
switch (code) {
case SFTPRINTPREVIEWN_STARTPRINTING:
SftPrintPreview_Print(hwndCtl, hwndDlg);
break;
}
break;
}
} else {
switch (id) {
case IDOK:
EndDialog(hwndDlg, TRUE);
break;
case IDCANCEL:
EndDialog(hwndDlg, FALSE);
break;
}
}
break;
}
case WM_NOTIFY: {
int id = (int) wParam;
LPNMHDR pnmh = (LPNMHDR) lParam;
switch (id) {
case IDC_PREVIEW:
switch (pnmh->code) {
case NM_SFTPRINTPREVIEW_CLOSE_CODE: { // user wants to close
NM_SFTPRINTPREVIEW_CLOSE* pNtfy = (NM_SFTPRINTPREVIEW_CLOSE*) lParam;
SendMessage(hwndDlg, WM_COMMAND, IDCANCEL, 0);
break;
}
case NM_SFTPRINTPREVIEW_HELP_CODE: { // Help requested
NM_SFTPRINTPREVIEW_HELP* pNtfy = (NM_SFTPRINTPREVIEW_HELP*) lParam;
MessageBox(hwndDlg, TEXT("Sorry, this sample application doesn't include online help."), TEXT("SftPrintPreview/DLL"), MB_OK);
break;
}
case NM_SFTPRINTPREVIEW_PAGESETUP_CODE: { // Page setup requested
HWND hwndCtl = GetDlgItem(hwndDlg, IDC_PREVIEW);
SftPrintPreview_PageSetup(hwndCtl, hwndDlg);
break;
}
}
break;
}
break;
}
case WM_SIZE: {
HWND hwndCtl = GetDlgItem(hwndDlg, IDC_PREVIEW);
RECT rect;
GetClientRect(hwndDlg, &rect);
MoveWindow(hwndCtl, 0, 0, rect.right-rect.left, rect.bottom-rect.top, TRUE);
break;
}
}
return FALSE;
}
/**********************************************************************/
/* Main Dialog Proc */
/**********************************************************************/
BOOL CALLBACK MainDialogProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg) {
case WM_INITDIALOG: {
HWND hwndRichEdit = GetDlgItem(hwndDlg, IDC_RICHEDIT);
CHARRANGE cr;
// Center this dialog
CenterWindow(hwndDlg);
// load Loading... text into edit control
SendMessage(hwndRichEdit, EM_EXLIMITTEXT, 0, 0x7fffffff);//need all the space we can get
// Load contents
LoadEditControlWithFile(hwndDlg, TEXT("SftPrintPreview.rtf"));
SetFocus(hwndRichEdit);
cr.cpMin = 0; cr.cpMax = 0;
SendMessage(hwndRichEdit, EM_EXSETSEL, 0, (LPARAM) &cr);
return FALSE;
}
case WM_DESTROY:
break;
case WM_COMMAND: {
HWND hwndCtl = (HWND) lParam;
int id = LOWORD(wParam);
int code = HIWORD(wParam);
if (hwndCtl) {
switch (id) {
case IDCANCEL:
case IDOK:
case IDC_PREVIEW:
case IDC_LOADFILE:
if (code == BN_CLICKED)
SendMessage(hwndDlg, WM_COMMAND, id, 0);
break;
}
} else {
switch (id) {
case IDOK:
EndDialog(hwndDlg, TRUE);
break;
case IDCANCEL:
EndDialog(hwndDlg, FALSE);
break;
case IDC_PREVIEW: {
m_hwndRichEdit = GetDlgItem(hwndDlg, IDC_RICHEDIT);// save edit window for preview window
DialogBox(g_hInst, MAKEINTRESOURCE(IDD_PREVIEW_DIALOG), hwndDlg, (DLGPROC)PreviewDialogProc);
break;
}
case IDC_LOADFILE:
LoadEditControl(hwndDlg);
break;
}
}
break;
}
}
return FALSE;
}
/**********************************************************************/
/* WinMain */
/**********************************************************************/
int PASCAL WinMain(HINSTANCE hinst, HINSTANCE hinstPrev, LPSTR lpszCmdLine, int cmdShow)
{
HMODULE hRichEditDLL;
g_hInst = hinst;
SftPrintPreview_RegisterApp(hinst); /* Register with SftPrintPreview/DLL */
hRichEditDLL = LoadLibrary(TEXT("riched20.dll")); // load richedit dll so we have richedit support */
_ASSERT(hRichEditDLL);
// Initialize, run, and terminate the application
DialogBox(g_hInst, MAKEINTRESOURCE(IDD_RICHEDIT_DIALOG), NULL, (DLGPROC)MainDialogProc);
FreeLibrary(hRichEditDLL);
SftPrintPreview_UnregisterApp(hinst); /* Unregister from SftPrintPreview/DLL */
return 0;
}
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