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托管C＋＋程序开发—Win表单文档程序设计(中)

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在托管C＋＋中，编写一个文档应用程序是非常复杂的，尽管在编写过程中能很好地帮助我们理解其内部机制

作者：Adding 来源：YESKY 2007年11月16日

关键字：

二、一个简单的MDI综合示例

　　下面给出一个简单的MDI应用程序代码，运行后结果如图1所示。

#using
using namespace System;

#using "System.dll"
#using "System.Windows.Forms.dll"
#using "System.Drawing.dll"

using namespace System::ComponentModel;
using namespace System::Windows::Forms;
using namespace System::Drawing;

// 这是子窗口
__gc class ChildWnd: public Form
{
private:
TextBox* m_pTextBox;

public:
ChildWnd()
{
InitChildWnd(); // 调用自定义的表单初始化代码
}
void Dispose() // 表单释放，类似于析构函数
{
// 所有的删除代码添加在这里
Form::Dispose(); // 默认的释放操作
}
void InitChildWnd()
{
Text = S"文档窗口——未命名";
m_pTextBox = new TextBox();
m_pTextBox->Dock = DockStyle::Fill;
m_pTextBox->Multiline = true;
m_pTextBox->BackColor = Color::White;
m_pTextBox->BorderStyle = BorderStyle::Fixed3D;

Controls->Add(m_pTextBox);
}
};

// 这是主框架窗口
__gc class MainFrame: public Form
{
private:
MainMenu * m_pMenu;

MenuItem * m_pFileMenu;
MenuItem * m_pFileMenuNew;
MenuItem * m_pFileMenuOpen;
MenuItem * m_pFileMenuExit;

MenuItem * m_pWndMenu;
MenuItem * m_pWndMenuIcons;
MenuItem * m_pWndMenuCascade;
MenuItem * m_pWndMenuTileHori;
MenuItem * m_pWndMenuTileVert;
MenuItem * m_pWndMenuList;
public:
MainFrame()
{
InitMainFrame(); // 调用自定义的表单初始化代码
CreateChildWnd();
}
void Dispose() // 表单释放，类似于析构函数
{
// 所有的删除代码添加在这里
Form::Dispose(); // 默认的释放操作
}
void InitMainFrame()
{
Text = S"Win表单多文档应用程序";
IsMdiContainer = true;

m_pFileMenuNew = new MenuItem( S"新建(&N)",
new EventHandler(this, &MainFrame::OnFileNew));
m_pFileMenuOpen = new MenuItem( S"打开(&O)",
new EventHandler(this, &MainFrame::OnFileOpen));
m_pFileMenuExit = new MenuItem( S"退出(&X)",
new EventHandler(this, &MainFrame::OnFileExit));

MenuItem* rItems[] = new MenuItem *[3];
rItems[0] = m_pFileMenuNew;
rItems[1] = m_pFileMenuOpen;
rItems[2] = m_pFileMenuExit;

m_pFileMenu = new MenuItem( S"文件(&F)", rItems);

m_pWndMenu = new MenuItem( S"窗口(&X)");
m_pWndMenu->MdiList = true;

m_pWndMenuIcons = new MenuItem( S"图标排列");
m_pWndMenuIcons->Click += new EventHandler(this, &MainFrame::OnWndMenu);
m_pWndMenu->MenuItems->Add(m_pWndMenuIcons);

m_pWndMenuCascade = new MenuItem( S"窗口层叠");
m_pWndMenuCascade->Click += new EventHandler(this, &MainFrame::OnWndMenu);
m_pWndMenu->MenuItems->Add(m_pWndMenuCascade);

m_pWndMenuTileHori = new MenuItem( S"上下平铺");
m_pWndMenuTileHori->Click += new EventHandler(this, &MainFrame::OnWndMenu);
m_pWndMenu->MenuItems->Add(m_pWndMenuTileHori);

m_pWndMenuTileVert = new MenuItem( S"左右平铺");
m_pWndMenuTileVert->Click += new EventHandler(this, &MainFrame::OnWndMenu);
m_pWndMenu->MenuItems->Add(m_pWndMenuTileVert);

m_pMenu = new MainMenu();
m_pMenu->MenuItems->Add(m_pFileMenu);
m_pMenu->MenuItems->Add(m_pWndMenu);

Menu = m_pMenu;
}

void OnFileNew(Object *sender, EventArgs *e)
{
CreateChildWnd();
}

void OnFileOpen(Object *sender, EventArgs *e)
{
OpenFileDialog *dlg = new OpenFileDialog();
dlg->Filter = S"所有文件|*.*";
dlg->ShowDialog();
}

void OnFileExit(Object *sender, EventArgs *e)
{
Close();
}

void OnWndMenu(Object *sender, EventArgs *e)
{
if(sender->Equals(m_pWndMenuIcons))
{
LayoutMdi(MdiLayout::ArrangeIcons);
}
else if(sender->Equals(m_pWndMenuCascade))
{
LayoutMdi(MdiLayout::Cascade);
}
else if(sender->Equals(m_pWndMenuTileHori))
{
LayoutMdi(MdiLayout::TileHorizontal);
}
else if(sender->Equals(m_pWndMenuTileVert))
{
LayoutMdi(MdiLayout::TileVertical);
}
}

void CreateChildWnd(void)
{
ChildWnd *pWnd = new ChildWnd();
pWnd->MdiParent = this;
pWnd->Show();
}

};
#ifdef _UNICODE
int wmain(void)
#else
int main(void)
#endif
{
Application::Run(new MainFrame()); // 启用应用程序，运行该类
return 0;
}