Sweden-Number/programs/wordpad/print.c

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/*
* Wordpad implementation - Printing and print preview functions
*
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* Copyright 2007-2008 by Alexander N. Sørnes <alex@thehandofagony.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <windows.h>
#include <richedit.h>
#include <commctrl.h>
#include "wordpad.h"
typedef struct _previewinfo
{
int page;
int pages;
HDC hdc;
HDC hdc2;
HDC hdcSized;
HDC hdcSized2;
RECT window;
LPWSTR wszFileName;
} previewinfo, *ppreviewinfo;
static HGLOBAL devMode;
static HGLOBAL devNames;
static RECT margins;
static previewinfo preview;
static const WCHAR var_pagemargin[] = {'P','a','g','e','M','a','r','g','i','n',0};
static LPWSTR get_print_file_filter(HWND hMainWnd)
{
static WCHAR wszPrintFilter[MAX_STRING_LEN*2+6+4+1];
const WCHAR files_prn[] = {'*','.','P','R','N',0};
const WCHAR files_all[] = {'*','.','*','\0'};
LPWSTR p;
HINSTANCE hInstance = (HINSTANCE)GetWindowLongPtr(hMainWnd, GWLP_HINSTANCE);
p = wszPrintFilter;
LoadStringW(hInstance, STRING_PRINTER_FILES_PRN, p, MAX_STRING_LEN);
p += lstrlenW(p) + 1;
lstrcpyW(p, files_prn);
p += lstrlenW(p) + 1;
LoadStringW(hInstance, STRING_ALL_FILES, p, MAX_STRING_LEN);
p += lstrlenW(p) + 1;
lstrcpyW(p, files_all);
p += lstrlenW(p) + 1;
*p = 0;
return wszPrintFilter;
}
void registry_set_pagemargins(HKEY hKey)
{
RegSetValueExW(hKey, var_pagemargin, 0, REG_BINARY, (LPBYTE)&margins, sizeof(RECT));
}
void registry_read_pagemargins(HKEY hKey)
{
DWORD size = sizeof(RECT);
if(!hKey || RegQueryValueExW(hKey, var_pagemargin, 0, NULL, (LPBYTE)&margins,
&size) != ERROR_SUCCESS || size != sizeof(RECT))
{
margins.top = 1417;
margins.bottom = 1417;
margins.left = 1757;
margins.right = 1757;
}
}
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static void AddTextButton(HWND hRebarWnd, UINT string, UINT command, UINT id)
{
REBARBANDINFOW rb;
HINSTANCE hInstance = (HINSTANCE)GetWindowLongPtr(hRebarWnd, GWLP_HINSTANCE);
WCHAR text[MAX_STRING_LEN];
HWND hButton;
LoadStringW(hInstance, string, text, MAX_STRING_LEN);
hButton = CreateWindowW(WC_BUTTONW, text,
WS_VISIBLE | WS_CHILD, 5, 5, 100, 15,
hRebarWnd, ULongToHandle(command), hInstance, NULL);
rb.cbSize = sizeof(rb);
rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
rb.hwndChild = hButton;
rb.cyChild = rb.cyMinChild = 22;
rb.cx = rb.cxMinChild = 90;
rb.cxIdeal = 100;
rb.wID = id;
SendMessageW(hRebarWnd, RB_INSERTBAND, -1, (LPARAM)&rb);
}
static HDC make_dc(void)
{
if(devNames && devMode)
{
LPDEVNAMES dn = GlobalLock(devNames);
LPDEVMODEW dm = GlobalLock(devMode);
HDC ret;
ret = CreateDCW((LPWSTR)dn + dn->wDriverOffset,
(LPWSTR)dn + dn->wDeviceOffset, 0, dm);
GlobalUnlock(dn);
GlobalUnlock(dm);
return ret;
} else
{
return 0;
}
}
static LONG twips_to_centmm(int twips)
{
return MulDiv(twips, CENTMM_PER_INCH, TWIPS_PER_INCH);
}
static LONG centmm_to_twips(int mm)
{
return MulDiv(mm, TWIPS_PER_INCH, CENTMM_PER_INCH);
}
static LONG twips_to_pixels(int twips, int dpi)
{
return MulDiv(twips, dpi, TWIPS_PER_INCH);
}
static LONG devunits_to_twips(int units, int dpi)
{
return MulDiv(units, TWIPS_PER_INCH, dpi);
}
static RECT get_print_rect(HDC hdc)
{
RECT rc;
int width, height;
if(hdc)
{
int dpiY = GetDeviceCaps(hdc, LOGPIXELSY);
int dpiX = GetDeviceCaps(hdc, LOGPIXELSX);
width = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALWIDTH), dpiX);
height = devunits_to_twips(GetDeviceCaps(hdc, PHYSICALHEIGHT), dpiY);
} else
{
width = centmm_to_twips(18500);
height = centmm_to_twips(27000);
}
rc.left = margins.left;
rc.right = width - margins.right;
rc.top = margins.top;
rc.bottom = height - margins.bottom;
return rc;
}
void target_device(HWND hMainWnd, DWORD wordWrap)
{
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
if(wordWrap == ID_WORDWRAP_MARGIN)
{
int width = 0;
LRESULT result;
HDC hdc = make_dc();
RECT rc = get_print_rect(hdc);
width = rc.right - rc.left;
if(!hdc)
{
HDC hMaindc = GetDC(hMainWnd);
hdc = CreateCompatibleDC(hMaindc);
ReleaseDC(hMainWnd, hMaindc);
}
result = SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, (WPARAM)hdc, width);
DeleteDC(hdc);
if (result)
return;
/* otherwise EM_SETTARGETDEVICE failed, so fall back on wrapping
* to window using the NULL DC. */
}
if (wordWrap != ID_WORDWRAP_NONE) {
SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 0);
} else {
SendMessageW(hEditorWnd, EM_SETTARGETDEVICE, 0, 1);
}
}
static LPWSTR dialog_print_to_file(HWND hMainWnd)
{
OPENFILENAMEW ofn;
static WCHAR file[MAX_PATH] = {'O','U','T','P','U','T','.','P','R','N',0};
static const WCHAR defExt[] = {'P','R','N',0};
static LPWSTR file_filter;
if(!file_filter)
file_filter = get_print_file_filter(hMainWnd);
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.Flags = OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
ofn.hwndOwner = hMainWnd;
ofn.lpstrFilter = file_filter;
ofn.lpstrFile = file;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrDefExt = defExt;
if(GetSaveFileNameW(&ofn))
return file;
else
return FALSE;
}
static int get_num_pages(HWND hEditorWnd, FORMATRANGE fr)
{
int page = 0;
fr.chrg.cpMin = 0;
do
{
page++;
fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE,
(LPARAM)&fr);
}
while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
return page;
}
static void char_from_pagenum(HWND hEditorWnd, FORMATRANGE *fr, int page)
{
int i;
fr->chrg.cpMin = 0;
for(i = 1; i < page; i++)
{
fr->chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)fr);
}
}
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static HWND get_ruler_wnd(HWND hMainWnd)
{
return GetDlgItem(GetDlgItem(hMainWnd, IDC_REBAR), IDC_RULER);
}
void redraw_ruler(HWND hRulerWnd)
{
RECT rc;
GetClientRect(hRulerWnd, &rc);
InvalidateRect(hRulerWnd, &rc, TRUE);
}
static void update_ruler(HWND hRulerWnd)
{
SendMessageW(hRulerWnd, WM_USER, 0, 0);
redraw_ruler(hRulerWnd);
}
static void print(LPPRINTDLGW pd, LPWSTR wszFileName)
{
FORMATRANGE fr;
DOCINFOW di;
HWND hEditorWnd = GetDlgItem(pd->hwndOwner, IDC_EDITOR);
int printedPages = 0;
fr.hdc = pd->hDC;
fr.hdcTarget = pd->hDC;
fr.rc = get_print_rect(fr.hdc);
fr.rcPage.left = 0;
fr.rcPage.right = fr.rc.right + margins.right;
fr.rcPage.top = 0;
fr.rcPage.bottom = fr.rc.bottom + margins.bottom;
ZeroMemory(&di, sizeof(di));
di.cbSize = sizeof(di);
di.lpszDocName = wszFileName;
if(pd->Flags & PD_PRINTTOFILE)
{
di.lpszOutput = dialog_print_to_file(pd->hwndOwner);
if(!di.lpszOutput)
return;
}
if(pd->Flags & PD_SELECTION)
{
SendMessageW(hEditorWnd, EM_EXGETSEL, 0, (LPARAM)&fr.chrg);
} else
{
GETTEXTLENGTHEX gt;
gt.flags = GTL_DEFAULT;
gt.codepage = 1200;
fr.chrg.cpMin = 0;
fr.chrg.cpMax = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
if(pd->Flags & PD_PAGENUMS)
char_from_pagenum(hEditorWnd, &fr, pd->nToPage);
}
StartDocW(fr.hdc, &di);
do
{
if(StartPage(fr.hdc) <= 0)
break;
fr.chrg.cpMin = SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)&fr);
if(EndPage(fr.hdc) <= 0)
break;
printedPages++;
if((pd->Flags & PD_PAGENUMS) && (printedPages > (pd->nToPage - pd->nFromPage)))
break;
}
while(fr.chrg.cpMin && fr.chrg.cpMin < fr.chrg.cpMax);
EndDoc(fr.hdc);
SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
}
void dialog_printsetup(HWND hMainWnd)
{
PAGESETUPDLGW ps;
ZeroMemory(&ps, sizeof(ps));
ps.lStructSize = sizeof(ps);
ps.hwndOwner = hMainWnd;
ps.Flags = PSD_INHUNDREDTHSOFMILLIMETERS | PSD_MARGINS;
ps.rtMargin.left = twips_to_centmm(margins.left);
ps.rtMargin.right = twips_to_centmm(margins.right);
ps.rtMargin.top = twips_to_centmm(margins.top);
ps.rtMargin.bottom = twips_to_centmm(margins.bottom);
ps.hDevMode = devMode;
ps.hDevNames = devNames;
if(PageSetupDlgW(&ps))
{
margins.left = centmm_to_twips(ps.rtMargin.left);
margins.right = centmm_to_twips(ps.rtMargin.right);
margins.top = centmm_to_twips(ps.rtMargin.top);
margins.bottom = centmm_to_twips(ps.rtMargin.bottom);
devMode = ps.hDevMode;
devNames = ps.hDevNames;
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update_ruler(get_ruler_wnd(hMainWnd));
}
}
void get_default_printer_opts(void)
{
PRINTDLGW pd;
ZeroMemory(&pd, sizeof(pd));
ZeroMemory(&pd, sizeof(pd));
pd.lStructSize = sizeof(pd);
pd.Flags = PD_RETURNDC | PD_RETURNDEFAULT;
pd.hDevMode = devMode;
PrintDlgW(&pd);
devMode = pd.hDevMode;
devNames = pd.hDevNames;
}
void print_quick(LPWSTR wszFileName)
{
PRINTDLGW pd;
ZeroMemory(&pd, sizeof(pd));
pd.hDC = make_dc();
print(&pd, wszFileName);
}
void dialog_print(HWND hMainWnd, LPWSTR wszFileName)
{
PRINTDLGW pd;
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
int from = 0;
int to = 0;
ZeroMemory(&pd, sizeof(pd));
pd.lStructSize = sizeof(pd);
pd.hwndOwner = hMainWnd;
pd.Flags = PD_RETURNDC | PD_USEDEVMODECOPIESANDCOLLATE;
pd.nMinPage = 1;
pd.nMaxPage = -1;
pd.hDevMode = devMode;
pd.hDevNames = devNames;
SendMessageW(hEditorWnd, EM_GETSEL, (WPARAM)&from, (LPARAM)&to);
if(from == to)
pd.Flags |= PD_NOSELECTION;
if(PrintDlgW(&pd))
{
devMode = pd.hDevMode;
devNames = pd.hDevNames;
print(&pd, wszFileName);
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update_ruler(get_ruler_wnd(hMainWnd));
}
}
static void preview_bar_show(HWND hMainWnd, BOOL show)
{
HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
int i;
if(show)
{
REBARBANDINFOW rb;
HWND hStatic;
AddTextButton(hReBar, STRING_PREVIEW_PRINT, ID_PRINT, BANDID_PREVIEW_BTN1);
AddTextButton(hReBar, STRING_PREVIEW_NEXTPAGE, ID_PREVIEW_NEXTPAGE, BANDID_PREVIEW_BTN2);
AddTextButton(hReBar, STRING_PREVIEW_PREVPAGE, ID_PREVIEW_PREVPAGE, BANDID_PREVIEW_BTN3);
AddTextButton(hReBar, STRING_PREVIEW_TWOPAGES, ID_PREVIEW_NUMPAGES, BANDID_PREVIEW_BTN4);
AddTextButton(hReBar, STRING_PREVIEW_CLOSE, ID_FILE_EXIT, BANDID_PREVIEW_BTN5);
hStatic = CreateWindowW(WC_STATICW, NULL,
WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
hReBar, NULL, NULL, NULL);
rb.cbSize = sizeof(rb);
rb.fMask = RBBIM_SIZE | RBBIM_CHILDSIZE | RBBIM_STYLE | RBBIM_CHILD | RBBIM_IDEALSIZE | RBBIM_ID;
rb.fStyle = RBBS_NOGRIPPER | RBBS_VARIABLEHEIGHT;
rb.hwndChild = hStatic;
rb.cyChild = rb.cyMinChild = 22;
rb.cx = rb.cxMinChild = 90;
rb.cxIdeal = 100;
rb.wID = BANDID_PREVIEW_BUFFER;
SendMessageW(hReBar, RB_INSERTBAND, -1, (LPARAM)&rb);
} else
{
for(i = 0; i <= PREVIEW_BUTTONS; i++)
SendMessageW(hReBar, RB_DELETEBAND, SendMessageW(hReBar, RB_IDTOINDEX, BANDID_PREVIEW_BTN1+i, 0), 0);
}
}
void init_preview(HWND hMainWnd, LPWSTR wszFileName)
{
preview.page = 1;
preview.hdc = 0;
preview.hdc2 = 0;
preview.wszFileName = wszFileName;
preview_bar_show(hMainWnd, TRUE);
}
void close_preview(HWND hMainWnd)
{
preview.window.right = 0;
preview.window.bottom = 0;
preview.page = 0;
preview.pages = 0;
preview_bar_show(hMainWnd, FALSE);
}
BOOL preview_isactive(void)
{
return preview.page != 0;
}
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static void add_ruler_units(HDC hdcRuler, RECT* drawRect, BOOL NewMetrics, long EditLeftmost)
{
static HDC hdc;
if(NewMetrics)
{
static HBITMAP hBitmap;
int i, x, y, RulerTextEnd;
int CmPixels;
int QuarterCmPixels;
HFONT hFont;
WCHAR FontName[] = {'M','S',' ','S','a','n','s',' ','S','e','r','i','f',0};
if(hdc)
{
DeleteDC(hdc);
DeleteObject(hBitmap);
}
hdc = CreateCompatibleDC(0);
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CmPixels = twips_to_pixels(centmm_to_twips(1000), GetDeviceCaps(hdc, LOGPIXELSX));
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QuarterCmPixels = (int)((float)CmPixels / 4.0);
hBitmap = CreateCompatibleBitmap(hdc, drawRect->right, drawRect->bottom);
SelectObject(hdc, hBitmap);
FillRect(hdc, drawRect, GetStockObject(WHITE_BRUSH));
hFont = CreateFontW(10, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FontName);
SelectObject(hdc, hFont);
SetBkMode(hdc, TRANSPARENT);
SetTextAlign(hdc, TA_CENTER);
y = (int)(((float)drawRect->bottom - (float)drawRect->top) / 2.0) + 1;
RulerTextEnd = drawRect->right - EditLeftmost + 1;
for(i = 1, x = EditLeftmost; x < (drawRect->right - EditLeftmost + 1); i ++)
{
WCHAR str[3];
WCHAR format[] = {'%','d',0};
int x2 = x;
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y, NULL);
LineTo(hdc, x2, y+2);
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y - 3, NULL);
LineTo(hdc, x2, y + 3);
x2 += QuarterCmPixels;
if(x2 > RulerTextEnd)
break;
MoveToEx(hdc, x2, y, NULL);
LineTo(hdc, x2, y+2);
x += CmPixels;
if(x > RulerTextEnd)
break;
wsprintfW(str, format, i);
TextOutW(hdc, x, 5, str, lstrlenW(str));
}
DeleteObject(hFont);
}
BitBlt(hdcRuler, 0, 0, drawRect->right, drawRect->bottom, hdc, 0, 0, SRCAND);
}
static void paint_ruler(HWND hWnd, long EditLeftmost, BOOL NewMetrics)
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
HDC hdcPrint = make_dc();
RECT printRect = get_print_rect(hdcPrint);
RECT drawRect;
HBRUSH hBrush = CreateSolidBrush(GetSysColor(COLOR_MENU));
GetClientRect(hWnd, &drawRect);
FillRect(hdc, &drawRect, hBrush);
drawRect.top += 3;
drawRect.bottom -= 3;
drawRect.left = EditLeftmost;
drawRect.right = twips_to_pixels(printRect.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
FillRect(hdc, &drawRect, GetStockObject(WHITE_BRUSH));
drawRect.top--;
drawRect.bottom++;
DrawEdge(hdc, &drawRect, EDGE_SUNKEN, BF_RECT);
drawRect.left = drawRect.right - 1;
drawRect.right = twips_to_pixels(printRect.right + margins.right - margins.left, GetDeviceCaps(hdc, LOGPIXELSX));
DrawEdge(hdc, &drawRect, EDGE_ETCHED, BF_RECT);
drawRect.left = 0;
drawRect.top = 0;
add_ruler_units(hdc, &drawRect, NewMetrics, EditLeftmost);
SelectObject(hdc, GetStockObject(BLACK_BRUSH));
DeleteObject(hBrush);
DeleteDC(hdcPrint);
EndPaint(hWnd, &ps);
}
LRESULT CALLBACK ruler_proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static WNDPROC pPrevRulerProc;
static long EditLeftmost;
static BOOL NewMetrics;
switch(msg)
{
case WM_USER:
if(wParam)
{
EditLeftmost = ((POINTL*)wParam)->x;
pPrevRulerProc = (WNDPROC)lParam;
}
NewMetrics = TRUE;
break;
case WM_PAINT:
paint_ruler(hWnd, EditLeftmost, NewMetrics);
break;
default:
return CallWindowProcW(pPrevRulerProc, hWnd, msg, wParam, lParam);
}
return 0;
}
static void draw_preview_page(HDC hdc, HDC* hdcSized, FORMATRANGE* lpFr, float ratio, int bmNewWidth, int bmNewHeight, int bmWidth, int bmHeight)
{
HBITMAP hBitmapScaled = CreateCompatibleBitmap(hdc, bmNewWidth, bmNewHeight);
HPEN hPen;
int TopMargin = (int)((float)twips_to_pixels(lpFr->rc.top, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
int BottomMargin = (int)((float)twips_to_pixels(lpFr->rc.bottom, GetDeviceCaps(hdc, LOGPIXELSX)) * ratio);
int LeftMargin = (int)((float)twips_to_pixels(lpFr->rc.left, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
int RightMargin = (int)((float)twips_to_pixels(lpFr->rc.right, GetDeviceCaps(hdc, LOGPIXELSY)) * ratio);
if(*hdcSized)
DeleteDC(*hdcSized);
*hdcSized = CreateCompatibleDC(hdc);
SelectObject(*hdcSized, hBitmapScaled);
StretchBlt(*hdcSized, 0, 0, bmNewWidth, bmNewHeight, hdc, 0, 0, bmWidth, bmHeight, SRCCOPY);
/* Draw margin lines */
hPen = CreatePen(PS_DOT, 1, RGB(0,0,0));
SelectObject(*hdcSized, hPen);
MoveToEx(*hdcSized, 0, TopMargin, NULL);
LineTo(*hdcSized, bmNewWidth, TopMargin);
MoveToEx(*hdcSized, 0, BottomMargin, NULL);
LineTo(*hdcSized, bmNewWidth, BottomMargin);
MoveToEx(*hdcSized, LeftMargin, 0, NULL);
LineTo(*hdcSized, LeftMargin, bmNewHeight);
MoveToEx(*hdcSized, RightMargin, 0, NULL);
LineTo(*hdcSized, RightMargin, bmNewHeight);
}
static void draw_preview(HWND hEditorWnd, FORMATRANGE* lpFr, int bmWidth, int bmHeight, RECT* paper, int page)
{
HBITMAP hBitmapCapture = CreateCompatibleBitmap(lpFr->hdc, bmWidth, bmHeight);
char_from_pagenum(hEditorWnd, lpFr, page);
SelectObject(lpFr->hdc, hBitmapCapture);
FillRect(lpFr->hdc, paper, GetStockObject(WHITE_BRUSH));
SendMessageW(hEditorWnd, EM_FORMATRANGE, TRUE, (LPARAM)lpFr);
/* EM_FORMATRANGE sets fr.rc to indicate the area printed in, but we want to
keep the original for drawing margins */
lpFr->rc = get_print_rect(lpFr->hdcTarget);
SendMessageW(hEditorWnd, EM_FORMATRANGE, FALSE, 0);
}
LRESULT print_preview(HWND hMainWnd)
{
FORMATRANGE fr;
GETTEXTLENGTHEX gt;
HDC hdc;
RECT window, background;
int bmWidth, bmHeight, bmNewWidth, bmNewHeight;
float ratioWidth, ratioHeight, ratio;
int xOffset, yOffset;
int barheight;
float spacing = 20.0;
HWND hReBar = GetDlgItem(hMainWnd, IDC_REBAR);
PAINTSTRUCT ps;
hdc = BeginPaint(hMainWnd, &ps);
GetClientRect(hMainWnd, &window);
fr.hdcTarget = make_dc();
fr.rc = get_print_rect(fr.hdcTarget);
fr.rcPage.left = 0;
fr.rcPage.top = 0;
fr.rcPage.bottom = fr.rc.bottom + margins.bottom;
fr.rcPage.right = fr.rc.right + margins.right;
bmWidth = twips_to_pixels(fr.rcPage.right, GetDeviceCaps(hdc, LOGPIXELSX));
bmHeight = twips_to_pixels(fr.rcPage.bottom, GetDeviceCaps(hdc, LOGPIXELSY));
if(!preview.hdc)
{
RECT paper;
HWND hEditorWnd = GetDlgItem(hMainWnd, IDC_EDITOR);
preview.hdc = CreateCompatibleDC(hdc);
if(preview.hdc2)
{
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if(preview.hdc2 != (HDC)-1)
DeleteDC(preview.hdc2);
preview.hdc2 = CreateCompatibleDC(hdc);
}
fr.hdc = preview.hdc;
gt.flags = GTL_DEFAULT;
gt.codepage = 1200;
fr.chrg.cpMin = 0;
fr.chrg.cpMax = SendMessageW(hEditorWnd, EM_GETTEXTLENGTHEX, (WPARAM)&gt, 0);
paper.left = 0;
paper.right = bmWidth;
paper.top = 0;
paper.bottom = bmHeight;
if(!preview.pages)
preview.pages = get_num_pages(hEditorWnd, fr);
fr.hdc = preview.hdc;
draw_preview(hEditorWnd, &fr, bmWidth, bmHeight, &paper, preview.page);
if(preview.hdc2)
{
fr.hdc = preview.hdc2;
draw_preview(hEditorWnd, &fr, bmWidth, bmHeight, &paper, preview.page + 1);
}
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_PREVPAGE), preview.page > 1);
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NEXTPAGE), preview.hdc2 ?
(preview.page + 1) < preview.pages :
preview.page < preview.pages);
EnableWindow(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), preview.pages > 1);
}
barheight = SendMessageW(hReBar, RB_GETBARHEIGHT, 0, 0);
ratioHeight = ((float)window.bottom - spacing - (float)barheight) / (float)bmHeight;
if(preview.hdc2)
ratioWidth = ((float)window.right / 2.0 - spacing * 2.0) / (float)bmWidth;
else
ratioWidth = ((float)window.right - spacing * 3.0) / (float)bmWidth;
if(ratioWidth > ratioHeight)
ratio = ratioHeight;
else
ratio = ratioWidth;
bmNewWidth = (int)((float)bmWidth * ratio);
bmNewHeight = (int)((float)bmHeight * ratio);
yOffset = ((window.bottom - bmNewHeight + barheight) / 2);
if(!preview.hdc2)
xOffset = (window.right - bmNewWidth) / 2;
else
xOffset = (window.right - bmNewWidth * 2) / 2;
window.top = barheight;
FillRect(hdc, &window, GetStockObject(GRAY_BRUSH));
background.left = xOffset - 2;
background.right = xOffset + bmNewWidth + 2;
background.top = yOffset - 2;
background.bottom = yOffset + bmNewHeight + 2;
FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
if(window.right != preview.window.right || window.bottom != preview.window.bottom)
{
draw_preview_page(preview.hdc, &preview.hdcSized, &fr, ratio, bmNewWidth, bmNewHeight, bmWidth, bmHeight);
if(preview.hdc2)
{
background.left += bmNewWidth + spacing;
background.right += bmNewWidth + spacing;
FillRect(hdc, &background, GetStockObject(BLACK_BRUSH));
draw_preview_page(preview.hdc2, &preview.hdcSized2, &fr, ratio, bmNewWidth, bmNewHeight, bmWidth, bmHeight);
}
}
BitBlt(hdc, xOffset, yOffset, bmNewWidth, bmNewHeight, preview.hdcSized, 0, 0, SRCCOPY);
if(preview.hdc2)
{
BitBlt(hdc, xOffset + bmNewWidth + spacing, yOffset, bmNewWidth, bmNewHeight, preview.hdcSized2, 0, 0, SRCCOPY);
}
DeleteDC(fr.hdcTarget);
preview.window = window;
EndPaint(hMainWnd, &ps);
return 0;
}
static void update_preview(HWND hWnd)
{
RECT rc;
DeleteDC(preview.hdc);
preview.hdc = 0;
preview.window.right = 0;
GetClientRect(hWnd, &rc);
rc.top += SendMessageW(GetDlgItem(hWnd, IDC_REBAR), RB_GETBARHEIGHT, 0, 0);
InvalidateRect(hWnd, &rc, TRUE);
}
LRESULT preview_command(HWND hWnd, WPARAM wParam)
{
switch(LOWORD(wParam))
{
case ID_FILE_EXIT:
PostMessageW(hWnd, WM_CLOSE, 0, 0);
break;
case ID_PREVIEW_NEXTPAGE:
case ID_PREVIEW_PREVPAGE:
{
if(LOWORD(wParam) == ID_PREVIEW_NEXTPAGE)
preview.page++;
else
preview.page--;
update_preview(hWnd);
}
break;
case ID_PREVIEW_NUMPAGES:
{
HWND hReBar = GetDlgItem(hWnd, IDC_REBAR);
WCHAR name[MAX_STRING_LEN];
HINSTANCE hInst = (HINSTANCE)GetWindowLongPtrW(hWnd, GWLP_HINSTANCE);
if(preview.hdc2)
{
DeleteDC(preview.hdc2);
preview.hdc2 = 0;
} else
{
if(preview.page == preview.pages)
preview.page--;
preview.hdc2 = (HDC)-1;
}
LoadStringW(hInst, preview.hdc2 ? STRING_PREVIEW_ONEPAGE : STRING_PREVIEW_TWOPAGES,
name, MAX_STRING_LEN);
SetWindowTextW(GetDlgItem(hReBar, ID_PREVIEW_NUMPAGES), name);
update_preview(hWnd);
}
break;
case ID_PRINT:
dialog_print(hWnd, preview.wszFileName);
SendMessageW(hWnd, WM_CLOSE, 0, 0);
break;
}
return 0;
}