Combining Images with Regions (C++ 5.0 and later)
Take the following steps to start a project and to add some code that combines two images with a region:
1. |
Start a new project as follows: |
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Run Microsoft Visual C++ 5.0, select the File >New menu option, and do the following: |
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a. |
Click the Projects tab. |
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b. |
Select MFC AppWizard (exe) as the project type |
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c. |
In the Project name text box, specify tutor. |
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d. |
In the Location text box, specify the path of the project. |
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e. |
Click the OK button. |
2. |
In the Step 1 dialog box, do the following: |
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a. |
Select Dialog based. |
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b. |
Click the Next button. |
3. |
In the Step 2 of 4 dialog box, do the following: |
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a. |
Ensure that About Box is selected. |
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b. |
Ensure that 3D Controls is selected. |
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c. |
Select ActiveX Controls |
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d. |
Click the Next button. |
4. |
In the Step 3 of 4 dialog box, do the following: |
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a. |
For comments, ensure that Yes, Please is selected. |
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b. |
For how to use the MFC library, select Use MFC in a Shared DLL. |
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c. |
Click the Next button. |
5. |
In the Step 4 of 4 dialog box, just click Finish. |
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6. |
Read New Project Information, and click OK. (The AppWizard creates the project files and opens the project.) |
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7. |
Add #import and #include statements to your program so you can access the LEAD COM constants and classes: |
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a. |
In the Project Workspace, click the FileView tab. |
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b. |
Double-click the tutor files folder to open it. |
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c. |
Double-click the Header Files folder to open it. |
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d. |
Double-click the StdAfx.h file to edit it. |
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e. |
Add the following lines to the end of the file (keep in mind, you may have to change the path to where the dll's reside): |
#import "c:\\winnt\\system32\\ltrvr14n.dll" no_namespace, named_guids
#import "c:\\winnt\\system32\\ltr14n.dll" no_namespace, named_guids
#import "c:\\winnt\\system32\\ltrio14n.dll" no_namespace, named_guids, exclude("LoadResizeConstants")
#import "c:\\winnt\\system32\\ltrpr14n.dll" no_namespace, named_guids
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f. |
In the Project Workspace, click the FileView tab. |
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g. |
Double-click the tutor files folder to open it. |
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h. |
Double-click the Header Files folder to open it. |
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i. |
Double-click the tutorDlg.h file to edit it. |
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j. |
Add the following lines to the top of the file: |
#include "leadraster.h"
8. |
Add a LEAD RasterView control to the main window as follows: |
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a. |
In the Project Workspace, click the ResourceView tab. |
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b. |
Double-click the tutor resources folder to open it. |
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c. |
Double-click the Dialog folder to open it. |
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d. |
Double-click IDD_TUTOR_DIALOG to design the form. |
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e. |
Select the TODO... text control; then press the Delete key to delete it. |
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f. |
From the main menu, select Project > Add to project > Components and Controls. (The Component Gallery appears.) |
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g. |
Click the Registered ActiveX Contols. |
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h. |
Double-click the LEAD Raster View Control (14.5) icon. (The Confirm Classes dialog box appears.) |
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i. |
Ensure that CLEADRasterView, CLEADRaster, and CPicture are checked. |
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j. |
Click OK to complete the selection; then click Close to close the Component Gallery. (The LEAD RasterView control appears in the Controls toolbar.) |
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k. |
Click the LEAD RasterView control icon; then size and position the control as you want it to appear at run time. |
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l. |
Use the right mouse button to edit the properties of the new LEAD RasterView control. |
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m. |
Change the ID to IDC_LEADRASTERVIEW1. |
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n. |
Click the LEAD RasterView control icon; then size and position the control as you want it to appear at run time. |
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o. |
Use the right mouse button to edit the properties of the new LEAD RasterView control. |
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p. |
Change the ID to IDC_LEADRASTERVIEW2. |
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q. |
Ensure that Visible property is unchecked. |
9. |
Press Ctrl-F4 to close all windows back to the Project Workspace. |
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10. |
Do the following to add m_LEADRasterView1 and m_LEADRasterView2 to the CTutorDlg class and link the variables to the LEAD RasterView controls using dynamic data exchange: |
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a. |
Press Ctrl-W. (The MFC ClassWizard dialog box appears.) |
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b. |
Click the Member Variables tab. |
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c. |
In the Class Name box, select CTutorDlg. |
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d. |
In the Control IDs list, select IDC_LEADRASTERVIEW1. |
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e. |
Click the Add Variable... button. |
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f. |
Specify m_LEADRasterView1 as the variable name, and Control as the category. |
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g. |
Click OK to close the dialog box.. |
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h. |
In the Control IDs list, select IDC_LEADRASTERVIEW2. |
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i. |
Click the Add Variable... button. |
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j. |
Specify m_LEADRasterView2 as the variable name, and Control as the category. |
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k. |
Click OK to close the dialog box, and click OK to close the MFC ClassWizard. |
11. |
Go to the OnInitDialog() function as follows: |
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a. |
In the Project Workspace, click the ClassView tab. |
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b. |
Double-click the tutor classes folder to open it. |
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c. |
Expand the CTutorDlg class. |
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d. |
Double-click the OnInitDialog() function to edit it. |
12. |
Edit the OnInitDialog() function to add the following initializing code before the line CDialog::OnInitDialog(); |
ILEADRasterIO *pRasterIO = NULL;
ILEADRasterProcess *pRasterProc = NULL;
13. |
Edit the OnInitDialog() function to add the following code after the line that says //TODO: Add extra initialization here: |
CoCreateInstance(CLSID_LEADRasterIO, NULL, CLSCTX_ALL, IID_ILEADRasterIO, (void**)&pRasterIO);
CoCreateInstance(CLSID_LEADRasterProcess, NULL, CLSCTX_ALL, IID_ILEADRasterProcess, (void**)&pRasterProc);
pRasterIO->Load(m_LEADRasterView1.GetRaster(), "c:\\sample1.cmp", 0, 0, 1);
pRasterIO->Load(m_LEADRasterView2.GetRaster(), "c:\\sample2.cmp", 0, 0, 1);
m_LEADRasterView1.GetRaster().SetRgnRect(100, 100, 300, 300, L_RGN_SET);
pRasterProc->Combine(m_LEADRasterView1.GetRaster(), 100, 100, 300, 300, m_LEADRasterView2.GetRaster(), 0, 0, (CombineConstants)(CB_OP_ADD | CB_DST_0));
m_LEADRasterView1.GetRaster().FreeRgn();
pRasterIO->Release();
pRasterIO = NULL;
pRasterProc->Release();
pRasterProc = NULL;
14. |
On the main menu, select Build > Build tutor.exe to build the project. |
15. |
On the main menu, select Build > Execute tutor.exe to run the project. |