datagridimagecolumn.h

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#pragma once

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

 
namespace My
{
	/// <summary> 
	/// DataGridImageColumn 摘要
	/// </summary>
	__gc public class DataGridImageColumn :  public System::Windows::Forms::DataGridColumnStyle
	{
		private: 
		System::Windows::Forms::ImageList *  imageList1;
		System::Windows::Forms::Label *  GridLabel;
		int _xMargin;// = 2;
		int _yMargin;// = 1;
		
		bool _inEdit;//= false;
		DataTable* _dataTable;
		DataGrid* _dataGrid;

	public:
		DataGridImageColumn(void)
		{
			InitializeComponent();
		}
		DataGridImageColumn(System::ComponentModel::IContainer *container) : components(0)
		{
			/// <summary>
			/// Windows.Forms 类撰写设计器支持所必需的
			/// </summary>

			container->Add(this);
			InitializeComponent();
		}
		
	protected: 
		void Dispose(Boolean disposing)
		{
			if (disposing && components)
			{
				components->Dispose();
			}
			__super::Dispose(disposing);
		}


	private: System::ComponentModel::IContainer *  components;

	private:
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>

		
		/// <summary>
		/// 设计器支持所需的方法 - 不要用代码编辑器
		///修改此方法的内容。
		/// </summary>		
		void InitializeComponent(void)
		{
			this->components = new System::ComponentModel::Container();			
		}
		//---------------------------成员方法------------------------------------
	public:
		DataGridImageColumn(String* colName, DataTable* dataSource,DataGrid* dataGrid,ImageList* _ImageList)
		{
			InitializeComponent();

			_xMargin = 2;
			_yMargin = 2;
			_inEdit = false;
			this->imageList1 = _ImageList;
			//选中单元格时显示
			this->GridLabel = new System::Windows::Forms::Label();			
			// 
			// GridLabel
			// 
			this->GridLabel->ImageList = this->imageList1;				
			this->GridLabel->ImageIndex = 0;				
			this->GridLabel->Text = S"状态";
			this->GridLabel->Width = 48;
			this->GridLabel->Height = 48;
			this->GridLabel->ImageAlign = System::Drawing::ContentAlignment::TopCenter;
			this->GridLabel->TextAlign = System::Drawing::ContentAlignment::BottomCenter;
			//this->GridLabel->BorderStyle = BorderStyle::Fixed3D;
			this->GridLabel->Enabled = false;
			//this->GridLabel->set_PreferredHeight = this->GridLabel->Height;
			//this->GridLabel->PreferredWidth = this->GridLabel->Width;
			this->GridLabel->Hide();
			

			
			_dataTable = dataSource;		

			this->Width = this->GridLabel->Width;
			this->MappingName = colName;
			this->HeaderText = colName;
			dataGrid->Controls->Add(this->GridLabel);
			_dataGrid = dataGrid;

		}
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="rowNum"></param>
	protected:
		void Abort(int rowNum) {
			_inEdit = false;			
		}
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="dataSource"></param>
		/// <param name="rowNum"></param>
		/// <returns></returns>
		bool Commit(CurrencyManager* dataSource,int rowNum)
		{				
			return true;
		}
		
		/// <summary>
		/// Standard override
		/// </summary>
		/// <returns></returns>
		int GetMinimumHeight() {
			return this->GridLabel->Height + _yMargin;
		}
		
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="g"></param>
		/// <param name="val"></param>
		/// <returns></returns>
		int GetPreferredHeight(Graphics* g ,Object* val) 
		{
			return this->GridLabel->Height + _yMargin;
		}
		
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="g"></param>
		/// <param name="val"></param>
		/// <returns></returns>
		Size GetPreferredSize(Graphics* g, Object* val)
		{
			//Size _extents = Size::Ceiling(g->MeasureString(GetText(val), this->DataGridTableStyle->DataGrid->Font));
			//_extents.Width += _xMargin * 2 ;
			//_extents.Height += _yMargin;
			return this->GridLabel->Size;//_extents;
		}
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="source"></param>
		/// <param name="rowNum"></param>
		/// <param name="bounds"></param>
		/// <param name="readOnly"></param>
		/// <param name="instantText"></param>
		/// <param name="cellIsVisible"></param>
		void Edit(CurrencyManager* source, int rowNum, Rectangle bounds, bool readOnly, String* instantText, bool cellIsVisible)
		{
			_inEdit = true;				
		}
		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="g"></param>
		/// <param name="bounds"></param>
		/// <param name="source"></param>
		/// <param name="rowNum"></param>
		void Paint(Graphics* g,Rectangle bounds,CurrencyManager* source,int rowNum)
		{
			Paint(g, bounds, source, rowNum, false);
		}

		/// <summary>
		/// Standard override
		/// </summary>
		/// <param name="g"></param>
		/// <param name="bounds"></param>
		/// <param name="source"></param>
		/// <param name="rowNum"></param>
		/// <param name="alignToRight"></param>
		void Paint(Graphics* g,Rectangle bounds,CurrencyManager* source,int rowNum, bool alignToRight)
		{
			System::Windows::Forms::Label* label = GetLabel(GetColumnValueAtRow(source, rowNum));
			if(label != NULL)
			{
				//label->Bounds = bounds;
				//label->Show();
				g->FillRectangle(new SolidBrush(this->_dataGrid->BackColor),bounds);
				g->DrawImage(label->Image,(int)((bounds.Width - label->Image->Width) / 2 + bounds.X),bounds.Y);
				SizeF TextSize = (g->MeasureString(label->Text,label->Font));
				g->DrawString(label->Text,label->Font,new SolidBrush(label->ForeColor),(float)((bounds.Width - TextSize.Width) / 2 + bounds.X),(float)(bounds.Y + label->Image->Height));
			}
			else
			{
				g->FillRectangle(new SolidBrush(this->_dataGrid->BackColor),bounds);
			}
		}
		System::Windows::Forms::Label* GetLabel(Object* val) 
		{
			if(val == System::DBNull::Value)
			{
				return NULL;				
			}
			if(val != NULL)
			{
				return __try_cast<System::Windows::Forms::Label*>(val);				
			}
			else
			{
				return NULL;				
			}
		}
	};
}