UE4创建VS工程项目源码分析之准备

雨点打透心脏的1/2处 2023-10-17 23:50 86阅读 0赞

功能源文件位置：  
**UE4->Source->Editor->GameProjectGeneration->Private->SNewProjectWizard.cpp**

下图按钮所调用的函数为：**void SNewProjectWizard::CreateAndOpenProject( )；**  
![这里写图片描述][70]

void SNewProjectWizard::CreateAndOpenProject( )
    {
        if( !IsCreateProjectEnabled() )
        {
            return;
        }
        //[ProjectFile]
        FString ProjectFile = GetProjectFilenameWithPath();
    
        //(ProjectFile:"E:\\3DEngine\\UnrealEngine4\\UEProject\\C++\\codeTest\\codeTest.uproject")
        if ( !CreateProject(ProjectFile) )
        {
            return;
        }
    
        // Prevent periodic validity checks. This is to prevent a brief error message about the project already existing while you are exiting.
        bPreventPeriodicValidityChecksUntilNextChange = true;
    
        if( GetSelectedTemplateItem()->bGenerateCode )
        {
            // If the engine is installed it is already compiled, so we can try to build and open a new project immediately. Non-installed situations might require building
            // the engine (especially the case when binaries came from P4), so we only open the IDE for that.
            if (FApp::IsEngineInstalled())
            {
                if (GameProjectUtils::BuildCodeProject(ProjectFile))
                {
                    OpenCodeIDE( ProjectFile );
                    OpenProject( ProjectFile );
                }
                else
                {
                    // User will have already been prompted to open the IDE
                }
            }
            else
            {
                OpenCodeIDE( ProjectFile );
            }
        }
        else
        {
            OpenProject( ProjectFile );
        }
    }

函数内部又调用了**bool SNewProjectWizard::CreateProject( const FString& ProjectFile )**

bool SNewProjectWizard::CreateProject( const FString& ProjectFile )
    {
        // Get the selected template
        TSharedPtr<FTemplateItem> SelectedTemplate = GetSelectedTemplateItem();
    
        if (!ensure(SelectedTemplate.IsValid()))
        {
            // A template must be selected.
            return false;
        }
    
        FText FailReason, FailLog;
    
        FProjectInformation ProjectInfo(ProjectFile, SelectedTemplate->bGenerateCode, bCopyStarterContent, SelectedTemplate->ProjectFile);
        ProjectInfo.TargetedHardware = SelectedHardwareClassTarget;
        ProjectInfo.DefaultGraphicsPerformance = SelectedGraphicsPreset;
        ProjectInfo.bIsEnterpriseProject = (SelectedTemplate->Type == FTemplateCategory::EnterpriseCategoryName);
    
        if (!GameProjectUtils::CreateProject(ProjectInfo, FailReason, FailLog))
        {
            SOutputLogDialog::Open(LOCTEXT("CreateProject", "Create Project"), FailReason, FailLog, FText::GetEmpty());
            return false;
        }
    
        // Successfully created the project. Update the last created location string.
        FString CreatedProjectPath = FPaths::GetPath(FPaths::GetPath(ProjectFile)); 
    
        // if the original path was the drives root (ie: C:/) the double path call strips the last /
        if (CreatedProjectPath.EndsWith(":"))
        {
            CreatedProjectPath.AppendChar('/');
        }
    
        auto* Settings = GetMutableDefault<UEditorSettings>();
        Settings->CreatedProjectPaths.Remove(CreatedProjectPath);
        Settings->CreatedProjectPaths.Insert(CreatedProjectPath, 0);
        Settings->bCopyStarterContentPreference = bCopyStarterContent;
        Settings->PostEditChange();
    
        return true;
    }

以下图方式来调试该功能  
![这里写图片描述][70 1]

### FTemplateItem解析 ###

![这里写图片描述][70 2]  
参数很直白明了，不用多说了Type肯定有C++和Blueprint。

--------------------

[70]: https://img-blog.csdn.net/20180826164800198?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE2MTIzMjc5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: https://img-blog.csdn.net/20180826171703475?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE2MTIzMjc5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 2]: https://img-blog.csdn.net/20180826172031845?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE2MTIzMjc5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70