form1.h

来自「《VC++2005编程实例》第一章的源代码」· C头文件 代码 · 共 210 行

#pragma once


namespace Example {

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

	/// <summary>
	/// Form1 摘要
	///
	/// 警告: 如果更改此类的名称，则需要更改
	///          与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
	///          “资源文件名”属性。否则，
	///          设计器将不能与此窗体的关联
	///          本地化资源正确交互。
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: 在此处添加构造函数代码
			//
		}

	protected:
		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::TreeView^  treeView1;
	protected: 

	private:
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要
		/// 使用代码编辑器修改此方法的内容。
		/// </summary>
		void InitializeComponent(void)
		{
			this->treeView1 = (gcnew System::Windows::Forms::TreeView());
			this->SuspendLayout();
			// 
			// treeView1
			// 
			this->treeView1->AllowDrop = true;
			this->treeView1->Dock = System::Windows::Forms::DockStyle::Fill;
			this->treeView1->Location = System::Drawing::Point(0, 0);
			this->treeView1->Name = L"treeView1";
			this->treeView1->Size = System::Drawing::Size(390, 214);
			this->treeView1->TabIndex = 0;
			this->treeView1->DragDrop += gcnew System::Windows::Forms::DragEventHandler(this, &Form1::treeView1_DragDrop);
			this->treeView1->DragOver += gcnew System::Windows::Forms::DragEventHandler(this, &Form1::treeView1_DragOver);
			this->treeView1->DragEnter += gcnew System::Windows::Forms::DragEventHandler(this, &Form1::treeView1_DragEnter);
			this->treeView1->ItemDrag += gcnew System::Windows::Forms::ItemDragEventHandler(this, &Form1::treeView1_ItemDrag);
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(390, 214);
			this->Controls->Add(this->treeView1);
			this->Name = L"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = L"演示在控件中实现拖放功能";
			this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
			this->ResumeLayout(false);

		}
#pragma endregion
//保存前一个鼠标进入的节点
	private: TreeNode^ MyOldNode;

//添加树形视图子节点
private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
 System::Windows::Forms::TreeNode^  treeNode1 = (gcnew System::Windows::Forms::TreeNode(L"东城区"));
			System::Windows::Forms::TreeNode^  treeNode2 = (gcnew System::Windows::Forms::TreeNode(L"西城区"));
			System::Windows::Forms::TreeNode^  treeNode3 = (gcnew System::Windows::Forms::TreeNode(L"朝阳区"));
			System::Windows::Forms::TreeNode^  treeNode4 = (gcnew System::Windows::Forms::TreeNode(L"北京市", gcnew cli::array< System::Windows::Forms::TreeNode^  >(3) {treeNode1, 
				treeNode2, treeNode3}));
			System::Windows::Forms::TreeNode^  treeNode5 = (gcnew System::Windows::Forms::TreeNode(L"上海市"));
			System::Windows::Forms::TreeNode^  treeNode6 = (gcnew System::Windows::Forms::TreeNode(L"天津市"));
			System::Windows::Forms::TreeNode^  treeNode7 = (gcnew System::Windows::Forms::TreeNode(L"渝中区"));
			System::Windows::Forms::TreeNode^  treeNode8 = (gcnew System::Windows::Forms::TreeNode(L"凤城街道"));
			System::Windows::Forms::TreeNode^  treeNode9 = (gcnew System::Windows::Forms::TreeNode(L"晏家街道"));
			System::Windows::Forms::TreeNode^  treeNode10 = (gcnew System::Windows::Forms::TreeNode(L"长寿湖镇"));
			System::Windows::Forms::TreeNode^  treeNode11 = (gcnew System::Windows::Forms::TreeNode(L"长寿区", gcnew cli::array< System::Windows::Forms::TreeNode^  >(3) {treeNode8, 
				treeNode9, treeNode10}));
			System::Windows::Forms::TreeNode^  treeNode12 = (gcnew System::Windows::Forms::TreeNode(L"渝北区"));
			System::Windows::Forms::TreeNode^  treeNode13 = (gcnew System::Windows::Forms::TreeNode(L"江北区"));
			System::Windows::Forms::TreeNode^  treeNode14 = (gcnew System::Windows::Forms::TreeNode(L"重庆市", gcnew cli::array< System::Windows::Forms::TreeNode^  >(4) {treeNode7, 
				treeNode11, treeNode12, treeNode13}));
			System::Windows::Forms::TreeNode^  treeNode15 = (gcnew System::Windows::Forms::TreeNode(L"中国直辖市", gcnew cli::array< System::Windows::Forms::TreeNode^  >(4) {treeNode4, 
				treeNode5, treeNode6, treeNode14}));
			this->treeView1->Name = L"treeView1";
			treeNode1->Name = L"节点9";
			treeNode1->Text = L"东城区";
			treeNode2->Name = L"节点10";
			treeNode2->Text = L"西城区";
			treeNode3->Name = L"节点11";
			treeNode3->Text = L"朝阳区";
			treeNode4->Name = L"节点1";
			treeNode4->Text = L"北京市";
			treeNode5->Name = L"节点2";
			treeNode5->Text = L"上海市";
			treeNode6->Name = L"节点3";
			treeNode6->Text = L"天津市";
			treeNode7->Name = L"节点5";
			treeNode7->Text = L"渝中区";
			treeNode8->Name = L"节点12";
			treeNode8->Text = L"凤城街道";
			treeNode9->Name = L"节点13";
			treeNode9->Text = L"晏家街道";
			treeNode10->Name = L"节点14";
			treeNode10->Text = L"长寿湖镇";
			treeNode11->Name = L"节点6";
			treeNode11->Text = L"长寿区";
			treeNode12->Name = L"节点7";
			treeNode12->Text = L"渝北区";
			treeNode13->Name = L"节点8";
			treeNode13->Text = L"江北区";
			treeNode14->Name = L"节点4";
			treeNode14->Text = L"重庆市";
			treeNode15->Name = L"节点0";
			treeNode15->Text = L"中国直辖市";
			this->treeView1->Nodes->AddRange(gcnew cli::array< System::Windows::Forms::TreeNode^  >(1) {treeNode15});
			this->treeView1->ExpandAll();			
		 }
//处理 treeView1控件ItemDrag事件
private: System::Void treeView1_ItemDrag(System::Object^  sender, System::Windows::Forms::ItemDragEventArgs^  e) {
   //设置拖放类型为移动
   this->treeView1->DoDragDrop(e->Item ,System::Windows::Forms::DragDropEffects::Move );
 }
//处理 treeView1控件DragEnter事件
private: System::Void treeView1_DragEnter(System::Object^  sender, System::Windows::Forms::DragEventArgs^  e) {
	TreeNode^ MyType=gcnew TreeNode;
	//获取节点的数据内容
	System::Object^ MyData = e->Data->GetData(MyType->GetType());
	//如果节点有数据，拖放目标允许移动
	if (MyData!=nullptr)
	{
		e->Effect = System::Windows::Forms::DragDropEffects::Move ;
	}
	else
	{
		 e->Effect = System::Windows::Forms::DragDropEffects::None;
	}
	TreeView^ MyTreeView=(TreeView^)sender;
	TreeNode^ MyNode = MyTreeView->GetNodeAt(treeView1->PointToClient (Point(e->X ,e->Y)));
	if (MyNode!=nullptr)
	{	//改变进入节点的背景色
		MyNode->BackColor = Color::Blue ;
		//保存此节点，进入下一个时还原背景色
		MyOldNode = MyNode;
	}
}
//处理 treeView1控件DragOver事件
private: System::Void treeView1_DragOver(System::Object^  sender, System::Windows::Forms::DragEventArgs^  e) {
	//修改鼠标进入节点的背景色，还原上一个节点的背景色
	TreeView^ MyTreeView = (TreeView^)sender;
	TreeNode^ MyNode = MyTreeView->GetNodeAt (treeView1->PointToClient (Point(e->X ,e->Y)));
	if ((MyNode != nullptr)&&(MyNode!=MyOldNode))
    {
		MyOldNode->BackColor = Color::White ;
		MyNode->BackColor = Color::Blue ;
		MyOldNode = MyNode;
	}
}
//处理 treeView1控件DragDrop事件
private: System::Void treeView1_DragDrop(System::Object^  sender, System::Windows::Forms::DragEventArgs^  e) {
	TreeNode^ MyType=gcnew TreeNode;
	//获取节点的数据内容
	TreeNode^ MyNode =(TreeNode^)e->Data->GetData(MyType->GetType());
	TreeView^ MyTreeView = (TreeView^)sender;
	//得到当前鼠标进入的节点
	TreeNode^ MyTargetNode = MyTreeView->GetNodeAt(treeView1->PointToClient (Point(e->X ,e->Y)));
	if (MyTargetNode!= nullptr)
	{
		TreeNode^ MyTargetParent = MyTargetNode->Parent ;
		//删除拖放的节点
		MyNode->Remove ();
		//添加到目标节点
		MyTargetNode->Nodes->Add(MyNode);
		MyTargetNode->BackColor = Color::White ;
		MyTreeView->SelectedNode = MyTargetNode;
	}
}
};
}