///////////////////////////////////////////////////////////////////////
// demoControl.cpp - Demonstration control example that illustrates: //
//                   - how to expose events (with delegates)         //
//                   - how to expose properties (by defining them)   //
//                                                                   //
// Language:    Visual C++/CLI, VS8                                  //
// Platform:    Dell Dimension 9250, Windows XP Pro, SP2             //
// Application: CSE775 - Distributed Objects Demo                    //
// Author:      Jim Fawcett, CST 2-187, Syracuse University          //
//              (315) 443-3948, jfawcett@twcny.rr.com                //
///////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "demoControl.h"

using namespace control;

//----< initialize control >-----------------------------------------

controlControl::controlControl(void)
{
  bkgrBrush = gcnew SolidBrush(Color::WhiteSmoke);
  this->controlText = "demoControl";
  InitializeComponent();
}
//----< define painted view of control surface >---------------------

void controlControl::OnPaint(PaintEventArgs^ e)
{
  Control::OnPaint(e);
  Graphics^ g = e->Graphics;
  SolidBrush^ blackbrush = gcnew SolidBrush(Color::Black);
  SolidBrush^ whitebrush = gcnew SolidBrush(Color::White);
  int ht = this->Height;
  int wd = this->Width;
  g->FillRectangle(bkgrBrush,0,0,wd,ht);
  String^ msg("CSE775 - Distributed Objects");
  g->DrawString(
       msg, gcnew System::Drawing::Font("tahoma",18),blackbrush,50,50
     );
}
//
//----< event handler for MouseDown >--------------------------------

System::Void controlControl::controlControl_MouseDown(
        System::Object^  sender, 
        System::Windows::Forms::MouseEventArgs^ e
      )
    {
      bkgrBrush = gcnew SolidBrush(Color::Bisque);
      this->Invalidate();
      
      //////////////////////////////////////////////////
      // It is odd, but the following fails to compile
      //   if(mousedown)
      // Apparently the invoker, in C++/CLI checks for
      // nullptr and does nothing if null

      // republish as our own event

      mousedown(this,e);
    }
//----< event handler for MouseUp >------------------------------

System::Void controlControl::controlControl_MouseUp(
    System::Object^  sender,
    System::Windows::Forms::MouseEventArgs^ e
  )
{
  bkgrBrush = gcnew SolidBrush(Color::WhiteSmoke);
  this->Invalidate();
     
  // republish as our own event

  // if(mouseup)
      
  mouseup(this,e);
}