Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
Implementing the Paint Automation Initializing, Creating and Freeing
Take the following steps to implement paint automation:
1. |
Start Visual C++, version 2005. |
2. |
Select the File->New menu option, and in the dialog box, select Project. |
3. |
In the New Project dialog box, make sure to select Visual C++ Win32 from the tree on the left of the dialog, and select Win32 Project as the project template. Give the Solution Name Tutorial_Automation and Give the project the name " Tutorial_Automation " and click OK. |
4. |
Win32 Application Wizard will initialize, click finish. |
5. |
In the Solution Explorer, browse to Tutorial_Automation.rc file and double click it. It will open the resource file in the view area. |
6. |
To add a new menu item in the File menu, open the File menu in the resource file you just opened in the view area, select a new location at the bottom of the menu, and type Open to add the new menu item Open.
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7. |
In stdafx.h add the following header after #include<tchar.h>: (keep in mind, you may have to change the path to where the header files reside): |
#include <commdlg.h>
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\l_bitmap.h"
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\ltdlg.h"
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\ltcon.h"
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\lttlb.h"
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\ltpnt.h"
#include "c:\Program Files\LEAD Technologies\LEADTOOLS 16\Include\ltaut.h"
8. |
Create a new file called Imports.cpp in place it beside your project files. |
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a. |
In the Project Workspace, click the Solution Explorer tab. |
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b. |
Double-click the Tutorial_Automation folder to open it. |
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c. |
Right-click the Source files folder and select Add New item. |
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d. |
Right-click on the Source file |
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e. |
Expand Visual C++ tree, if it is not already expanded. |
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f. |
Select Code from the sub tree. |
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g. |
Select C++ File (.cpp) from the right window. |
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h. |
In the name text box, specify Imports. |
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i. |
Click the OK button. |
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j. |
Double-click the imports.cpp in the solution Explorer and add the following lines: (keep in mind, you may have to change the path to where the header files reside) |
#if defined(FOR_WIN64)
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\Ltkrn_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\Ltdis_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\Ltdlgkrn_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\Ltdlgfile_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\Ltfil_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\ltaut_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\ltcon_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\lttlb_x.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\x64\\ltpdg_x.lib")
#elif defined(FOR_WIN32)
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\Ltkrn_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\Ltdis_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\Ltdlgkrn_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\Ltdlgfile_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\Ltfil_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\ltaut_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\ltcon_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\lttlb_u.lib")
#pragma comment(lib, "c:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Lib\\CDLL\\Win32\\ltpdg_u.lib")
#endif // #if defined(FOR_WIN64)
9. |
Add the following functions in Tutorial_Automation.cpp right before WndProc procedure. |
static L_VOID OnSize(HWND hWnd,
pBITMAPHANDLE pBitmap,
LPRECT prcView,
L_INT cx,
L_INT cy,
L_INT nScalarNum,
L_INT nScalarDen,
L_INT *pnHScroll,
L_INT *pnVScroll)
{
SCROLLINFO si ;
L_INT nXOffset, nYOffset ;
if ( NULL != pBitmap && pBitmap->Flags.Allocated )
{
si.cbSize = sizeof ( SCROLLINFO ) ;
si.fMask = SIF_ALL ;
// vertical scroll.
GetScrollInfo ( hWnd, SB_VERT, &si ) ;
si.nMin = 0 ;
si.nMax = BITMAPHEIGHT ( pBitmap ) ;
si.nPage = MulDiv ( cy, nScalarDen, nScalarNum ) ;
SetScrollInfo ( hWnd, SB_VERT, &si, TRUE ) ;
GetScrollInfo ( hWnd, SB_VERT, &si ) ;
*pnVScroll = si.nPos ;
// horizontal scroll
GetScrollInfo ( hWnd, SB_HORZ, &si ) ;
si.nMin = 0 ;
si.nMax = BITMAPWIDTH ( pBitmap ) ;
si.nPage = MulDiv ( cx, nScalarDen, nScalarNum ) ;
SetScrollInfo ( hWnd, SB_HORZ, &si, TRUE ) ;
GetScrollInfo ( hWnd, SB_HORZ, &si ) ;
*pnHScroll = si.nPos ;
}
else
{
si.cbSize = sizeof ( SCROLLINFO ) ;
si.fMask = SIF_RANGE ;
si.nMin = 0 ;
si.nMax = 0 ;
SetScrollInfo ( hWnd, SB_VERT, &si, TRUE ) ;
SetScrollInfo ( hWnd, SB_HORZ, &si, TRUE ) ;
*pnHScroll = 0 ;
*pnVScroll = 0 ;
}
// set the painting rectangle.
SetRect ( prcView, 0, 0, BITMAPWIDTH ( pBitmap ), BITMAPHEIGHT ( pBitmap ) ) ;
if ( nScalarDen > nScalarNum )
{
nXOffset = MulDiv ( *pnHScroll, nScalarDen, nScalarNum ) ;
nYOffset = MulDiv ( *pnVScroll, nScalarDen, nScalarNum ) ;
}
else
{
nXOffset = *pnHScroll ;
nYOffset = *pnVScroll ;
}
OffsetRect ( prcView, - nXOffset, - nYOffset ) ;
prcView->left = MulDiv ( prcView->left, nScalarNum, nScalarDen ) ;
prcView->top = MulDiv ( prcView->top, nScalarNum, nScalarDen ) ;
prcView->right = MulDiv ( prcView->right, nScalarNum, nScalarDen ) ;
prcView->bottom = MulDiv ( prcView->bottom, nScalarNum, nScalarDen ) ;
}
L_VOID OnHScroll(HWND hWnd,
L_UINT code,
L_INT nScalarNum,
L_INT nScalarDen,
LPRECT prcView,
L_INT *pnHScroll,
L_INT *pnVScroll)
{
SCROLLINFO si ;
si.cbSize = sizeof (SCROLLINFO) ;
si.fMask = SIF_ALL ;
GetScrollInfo (hWnd, SB_HORZ, &si) ;
*pnHScroll = si.nPos ;
switch ( code )
{
case SB_LINELEFT:
si.nPos -= 1 ;
break ;
case SB_LINERIGHT:
si.nPos += 1 ;
break ;
case SB_PAGELEFT:
si.nPos -= si.nPage ;
break ;
case SB_PAGERIGHT:
si.nPos += si.nPage ;
break ;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos ;
break ;
default:
break ;
}
si.fMask = SIF_POS;
SetScrollInfo (hWnd, SB_HORZ, &si, TRUE) ;
GetScrollInfo (hWnd, SB_HORZ, &si) ;
if ( si.nPos != *pnHScroll )
{
L_INT dxUpdate ;
// update screen.
if ( nScalarDen < nScalarNum )
{
dxUpdate = MulDiv ( ( *pnHScroll - si.nPos ), nScalarNum, nScalarDen ) ;
}
else
{
dxUpdate = *pnHScroll - si.nPos ;
}
// update screen.
OffsetRect ( prcView, dxUpdate, 0 ) ;
ScrollWindow ( hWnd, dxUpdate, 0, NULL, NULL ) ;
*pnHScroll = si.nPos ;
UpdateWindow ( hWnd ) ;
}
}
L_VOID OnVScroll(HWND hWnd,
L_UINT code,
L_INT nScalarNum,
L_INT nScalarDen,
LPRECT prcView,
L_INT *pnHScroll,
L_INT *pnVScroll)
{
SCROLLINFO si;
si.cbSize = sizeof ( SCROLLINFO ) ;
si.fMask = SIF_ALL ;
GetScrollInfo (hWnd, SB_VERT, &si) ;
*pnVScroll = si.nPos ;
switch ( code )
{
case SB_LINEUP:
si.nPos -= 1 ;
break ;
case SB_LINEDOWN:
si.nPos += 1 ;
break ;
case SB_PAGEUP:
si.nPos -= si.nPage ;
break ;
case SB_PAGEDOWN:
si.nPos += si.nPage ;
break ;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos ;
break ;
default:
break ;
}
si.fMask = SIF_POS ;
SetScrollInfo ( hWnd, SB_VERT, &si, TRUE ) ;
GetScrollInfo ( hWnd, SB_VERT, &si ) ;
if ( si.nPos != *pnVScroll )
{
L_INT dyUpdate ;
// update screen.
if ( nScalarDen < nScalarNum )
{
dyUpdate = MulDiv ( ( *pnVScroll - si.nPos ), nScalarNum, nScalarDen ) ;
}
else
{
dyUpdate = *pnVScroll - si.nPos ;
}
// update screen.
OffsetRect ( prcView, 0, dyUpdate ) ;
ScrollWindow ( hWnd, 0, dyUpdate, NULL, NULL ) ;
*pnVScroll = si.nPos ;
UpdateWindow ( hWnd ) ;
}
}
L_VOID OnPaint(HWND hWnd,
pBITMAPHANDLE pBitmap,
LPRECT prcView,
HPALETTE hPalette)
{
HDC hDC ;
PAINTSTRUCT ps ;
HPALETTE hOldPal = NULL ;
hDC = BeginPaint (hWnd, &ps) ;
if ( pBitmap->Flags.Allocated )
{
if ( hPalette )
{
hOldPal = SelectPalette ( hDC, hPalette, TRUE ) ;
RealizePalette ( hDC ) ;
}
L_PaintDC
( hDC, pBitmap, NULL, NULL, prcView, &ps.rcPaint, SRCCOPY ) ;
if ( NULL != hOldPal )
{
SelectPalette ( hDC, hOldPal, TRUE ) ;
}
}
EndPaint (hWnd, &ps) ;
}
static L_BOOL OnOpen ( HWND hWnd, pBITMAPHANDLE pBitmap )
{
static L_INT nOpenIndex = 0 ;
OPENFILENAME OpenFileName ;
L_TCHAR szFile [ MAX_PATH ] = TEXT("\0") ;
L_TCHAR szFileTitle [ MAX_PATH ] = TEXT("\0") ;
L_TCHAR szOpenFileFilter [ ] = {TEXT("ALL\0")TEXT("*.*\0")} ;
OPENDLGPARAMS OpenDlgParams ;
BITMAPHANDLE hThumb ;
L_INT nRet;
memset ( &OpenDlgParams, 0, sizeof ( OPENDLGPARAMS ) ) ;
lstrcpy ( szFile, TEXT("") ) ;
L_InitBitmap ( pBitmap, sizeof(BITMAPHANDLE), 0, 0, 0 ) ;
L_InitBitmap ( &hThumb, sizeof(BITMAPHANDLE), 0, 0, 0 ) ;
OpenFileName.lStructSize = sizeof(OPENFILENAME);
OpenFileName.hwndOwner = hWnd;
OpenFileName.lpstrFilter = szOpenFileFilter;
OpenFileName.lpstrCustomFilter = NULL;
OpenFileName.nMaxCustFilter = 0;
OpenFileName.nFilterIndex = nOpenIndex;
OpenFileName.nMaxFile = sizeof(szFile);
OpenFileName.lpstrFile = szFile;
OpenFileName.nMaxFileTitle = sizeof(szFileTitle);
OpenFileName.lpstrFileTitle = szFileTitle;
OpenFileName.lpstrInitialDir = NULL;
OpenFileName.lpstrTitle = TEXT("Open a File");
OpenFileName.nFileOffset = 0;
OpenFileName.nFileExtension = 0;
OpenFileName.lpstrDefExt = NULL;
OpenFileName.lpfnHook = NULL;
OpenFileName.Flags = OFN_LONGNAMES ;
OpenDlgParams.uStructSize = sizeof(OPENDLGPARAMS);
OpenDlgParams.bPreviewEnabled = TRUE;
OpenDlgParams.uDlgFlags = DLG_OPEN_SHOW_PREVIEW |
DLG_OPEN_SHOW_FILEINFO;
nRet = L_DlgOpen ( hWnd, &OpenFileName, &OpenDlgParams );
if (nRet == SUCCESS_DLG_OK)
{
nOpenIndex = OpenFileName.nFilterIndex;
L_FreeBitmap
( &hThumb ) ;
L_LoadBitmap (OpenDlgParams.pFileData[0].szFileName, pBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, NULL, NULL);
L_ChangeBitmapViewPerspective
( NULL, pBitmap, sizeof(BITMAPHANDLE), TOP_LEFT );
return TRUE ;
}
else
{
return FALSE ;
}
}
10. |
Change the WndProc function to look like this: |
LRESULT CALLBACK WndProc( HWND hWnd, L_UINT uMessage, WPARAM wParam, LPARAM lParam )
{
static BITMAPHANDLE hBitmap ;
static RECT rcView ;
static HPALETTE hPalette = NULL ;
static L_INT nVScroll = 0 ;
static L_INT nHScroll = 0 ;
static L_INT nScalarNum = 1, nScalarDen = 1 ;
switch( uMessage )
{
case WM_CREATE:
L_DlgInit (DLG_INIT_COLOR);
return 0L ;
case WM_DESTROY:
if ( hBitmap.Flags.Allocated )
{
L_FreeBitmap
( &hBitmap ) ;
}
if ( hPalette )
{
DeleteObject( hPalette ) ;
}
PostQuitMessage ( 0 ) ;
return 0L ;
case WM_SIZE:
OnSize ( hWnd,
&hBitmap,
&rcView,
LOWORD ( lParam ),
HIWORD ( lParam ),
nScalarNum,
nScalarDen,
&nHScroll,
&nVScroll ) ;
break ;
case WM_HSCROLL:
OnHScroll ( hWnd,
LOWORD ( wParam ),
nScalarNum,
nScalarDen,
&rcView,
&nHScroll,
&nVScroll ) ;
break ;
case WM_VSCROLL:
OnVScroll ( hWnd,
LOWORD ( wParam ),
nScalarNum,
nScalarDen,
&rcView,
&nHScroll,
&nVScroll ) ;
break ;
case WM_PAINT:
OnPaint ( hWnd, &hBitmap, &rcView, hPalette ) ;
break ;
case WM_COMMAND:
switch( LOWORD( wParam ) )
{
case ID_FILE_OPEN:
{
BITMAPHANDLE hTempBitmap ;
HDC hDC ;
if ( OnOpen ( hWnd, &hTempBitmap ) )
{
if ( hBitmap.Flags.Allocated )
{
L_FreeBitmap ( &hBitmap ) ;
}
if ( hPalette )
{
DeleteObject( hPalette ) ;
}
nScalarNum = 1 ;
nScalarDen = 1 ;
L_CopyBitmapHandle (&hBitmap, &hTempBitmap , sizeof(BITMAPHANDLE)) ;
hDC = GetDC ( hWnd ) ;
hPalette = L_CreatePaintPalette ( hDC, &hBitmap ) ;
ReleaseDC ( hWnd, hDC ) ;
{//ADJUST WINDOW SIZE
RECT rcWindow ;
L_INT nWidth, nHeight ;
SystemParametersInfo ( SPI_GETWORKAREA, 0, &rcWindow, 0 ) ;
nWidth = min ( MulDiv ( BITMAPWIDTH ( &hBitmap ), nScalarNum, nScalarDen ),
( rcWindow.right - rcWindow.left ) ) ;
nHeight = min ( MulDiv ( BITMAPHEIGHT ( &hBitmap ), nScalarNum, nScalarDen ),
( rcWindow.bottom - rcWindow.top ) ) ;
MoveWindow ( hWnd,
0,
0,
nWidth,
nHeight,
TRUE ) ;
}//ADJUST WINDOW SIZE
InvalidateRect ( hWnd, NULL, TRUE ) ;
}
}
return 0L ;
case IDM_EXIT:
PostMessage ( hWnd, WM_CLOSE, 0, 0 ) ;
return 0L ;
}
break ;
}
return DefWindowProc ( hWnd, uMessage, wParam, lParam ) ;
}
11. |
Change the _tWinMain function to look like this: |
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
const L_TCHAR szClassName [ ] = TEXT("lead_paint_automation_tutorial") ;
WNDCLASSEX WndClass ;
HWND hWnd ;
MSG Msg ;
UNREFERENCED_PARAMETER ( hPrevInstance ) ;
UNREFERENCED_PARAMETER ( lpCmdLine ) ;
// unlock lead file formats support
UNLOCKSUPPORT ( ) ;
WndClass.cbSize = sizeof ( WNDCLASSEX ) ;
WndClass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
WndClass.lpfnWndProc = WndProc ;
WndClass.cbClsExtra = 0 ;
WndClass.cbWndExtra = 0 ;
WndClass.hInstance = hInst ;
WndClass.hIcon = LoadIcon ( NULL, IDI_APPLICATION ) ;
WndClass.hCursor = LoadCursor ( NULL, IDC_ARROW ) ;
WndClass.hbrBackground = ( HBRUSH ) ( COLOR_WINDOW + 1 ) ;
WndClass.lpszMenuName = MAKEINTRESOURCE ( IDC_TUTORIAL_AUTOMATION) ;
WndClass.lpszClassName = szClassName ;
WndClass.hIconSm = NULL ;
RegisterClassEx ( &WndClass ) ;
hWnd = CreateWindowEx ( 0L,
szClassName,
TEXT("Paint Automation Tutorial"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
0,
CW_USEDEFAULT,
0,
NULL,
NULL,
hInst,
NULL ) ;
ShowWindow ( hWnd, nCmdShow ) ;
UpdateWindow ( hWnd ) ;
while ( GetMessage ( &Msg, NULL, 0, 0 ) != 0 )
{
TranslateMessage ( &Msg ) ;
DispatchMessage ( &Msg ) ;
}
UnregisterClass ( szClassName, hInst ) ;
return (L_INT)Msg.wParam ;
}
12. |
Add the following declaration to the WndProc function: |
static pAUTOMATIONHANDLE pAutomation ;
13. |
Replace the line "return 0L ;" after the statement "case WM_CREATE:" in the WndProc function with the following code: |
if ( SUCCESS == L_AutInit ( &pAutomation ) )
{
// create the paint automation
if ( SUCCESS != L_AutCreate ( pAutomation, AUTOMATION_MODE_PAINT, 0 ) )
{
MessageBox ( hWnd, TEXT("Error creating Paint Automation"), TEXT("Error:"), MB_ICONSTOP );
L_AutFree (pAutomation ) ;
return -1 ;
}
return 0L ;
}
else
{
return -1L ;
}
14. |
Add the following lines to the WndProc function before the statement "PostQuitMessage" in the "case WM_DESTROY:" |
if ( SUCCESS == L_AutIsValid ( pAutomation ) )
{
L_AutFree ( pAutomation ) ;
}
15. |
Compile and run the project by selecting Build->Execute tutorial.exe from the menu. |