Microsoft Visual C++ .NET Professional Projects - Premier Press

430 Project 2 CREATING AN APPLICATION USING MANAGED C++

Stream* s = File::Open(fileName, FileMode::Create); BinaryFormatter* b = new BinaryFormatter(); b->Serialize(s, strokeList);

s->Close();

//Now that the doc is saved, its no more dirty bIsDirty = false;

}

catch(Exception* ex)

{

MessageBox::Show(ex->ToString());

}

}

Pen* CGDIPlusDoc::GetCurrentPen()

{

return pCurrentPen;

}

Brush* CGDIPlusDoc::GetCurBrush()

{

return pCurrentBrush;

}

Team-Fly®

CREATING A MANAGED EXTENSIONS APPLICATION Chapter 12 431

//Updates all the views of the document with the new data

void CGDIPlusDoc::UpdateAllViews(CGDIPlusView* sender, CStroke* newStroke)

{

CGDIPlusView* pView;

for(int i=0; i < viewList->Count ; i++)

{

pView = dynamic_cast<CGDIPlusView*> (viewList->Item[i]);

if(pView->Equals(sender)) continue;

//If this is for a new stroke if(newStroke)

{

pView->Invalidate(newStroke->GetBoundingRectangle());

}

else

{

//must be ClearAll, hence invalidate the entire region pView->Invalidate();

}

pView->Update();

}

}

// Deletes the contents of the document void CGDIPlusDoc::DeleteContents()

{

strokeList->Clear(); UpdateAllViews(0, 0);

}

//View Header File

#ifndef __GDIPLUSVIEW_H__ #define __GDIPLUSVIEW_H__

#using <mscorlib.dll>

432 Project 2 CREATING AN APPLICATION USING MANAGED C++

#using <System.DLL>

#using <System.Drawing.DLL> #using <System.Windows.Forms.DLL>

using namespace System;

using namespace System::ComponentModel; using namespace System::Windows::Forms; using namespace System::Collections; using namespace System::IO;

using namespace System::Drawing;

using namespace System::Drawing::Printing; using namespace System::Collections;

#include “GDIPlusDoc.h”

__gc class CGDIPlusView : public Form

{

///<summary>

///Required designer variable

///</summary>

private:

System::ComponentModel::Container* pComponents;

CGDIPlusDoc* pDoc;

CMainWindow* pMainWin;

public:

Point ptPrevPoint;

CStroke* pCurrentStroke;

CGDIPlusView(CGDIPlusDoc* pDoc1, CMainWindow* pParent); ~CGDIPlusView();

void InitializeComponent();

void MouseDownHandler(Object* sender,MouseEventArgs* e); void MouseMoveHandler(Object* sender,MouseEventArgs* e); void MouseUpHandler(Object* sender,MouseEventArgs* e);

CREATING A MANAGED EXTENSIONS APPLICATION Chapter 12 433

void PaintHandler(Object* sender, PaintEventArgs* e); void ClosingHandler(Object* sender, CancelEventArgs* e); void ClosedHandler(Object* sender, EventArgs* e);

CGDIPlusDoc* GetDocument();

public:

void HandleLineDraw(); void HandleEllipseDraw(); void HandleRectDraw();

void HandleTextDraw(String* pStr, Drawing::Font* pFont, Color colorText); void HandleFilledEllipseDraw();

void HandleFilledRectDraw();

};

#endif __GDIPLUSVIEW_H__

//View .cpp file

#include “GDIPlus.h” #include “GDIPlusView.h” #include “GDIPlusDoc.h”

CGDIPlusView:: CGDIPlusView(CGDIPlusDoc* pDoc1, CMainWindow* pParent)

{

InitializeComponent(); pDoc = pDoc1;

MdiParent = pParent; //PSK pMainWin = pParent;

this->Text = String::Concat(S”GDIPlusDoc”, pDoc->nDocID.ToString(), S”:”, pDoc->viewList->Count.ToString());

}

CGDIPlusView::~CGDIPlusView()

{

}

void CGDIPlusView::InitializeComponent()

{

CREATING A MANAGED EXTENSIONS APPLICATION Chapter 12 435

return;

try

{

Point* p= __nogc new Point(e->X, e->Y);

//Need to box the Point because its a ValueType __box Point* pt = __box(*p); pCurrentStroke->pPointArray->Add(pt);

Graphics* g = CreateGraphics(); g->DrawLine(pDoc->GetCurrentPen(), ptPrevPoint, *p); ptPrevPoint = *p;

}

catch (Exception* ex) { MessageBox::Show(ex->ToString());

}

}

void CGDIPlusView::MouseUpHandler(Object* sender,MouseEventArgs* e)

{

if(!pCurrentStroke)

return;

try

{

Point* p= __nogc new Point(e->X, e->Y); __box Point* pt = __box(*p); pCurrentStroke->pPointArray->Add(pt); Graphics* g = CreateGraphics();

g->DrawLine(pDoc->GetCurrentPen(), ptPrevPoint, *p);

ptPrevPoint=*p;

//Tell the stroke item that we’re done adding points to it.

//This is so it can finish computing its bounding rectangle. pCurrentStroke->FinishStroke();

//Now that a stoke is added, inform all the views of the document about

this

pDoc->UpdateAllViews(this, pCurrentStroke);

Capture = false;

CREATING A MANAGED EXTENSIONS APPLICATION Chapter 12 437

{

pDoc->SaveDocument(pSaveDlg->FileName); pDoc->viewList->Remove(this);

}

else if(nRes == DialogResult::Cancel) e->Cancel = true;

}

else if(nSave == DialogResult::Cancel)

{

e->Cancel = true; //If user selected ‘Cancel’, don’t close

the form

}

else if(nSave == DialogResult::No) pDoc->viewList->Remove(this);

}

else

{

pDoc->viewList->Remove(this);

}

}

void CGDIPlusView::ClosedHandler(Object* sender, EventArgs* e)

{

//If there are no child views, then disable menu and toolbar items if(pMainWin->MdiChildren->Length == 0 )

pMainWin->DisableItems();

}

CGDIPlusDoc* CGDIPlusView::GetDocument()

{

return pDoc;

}

void CGDIPlusView::HandleLineDraw()

{

try

{

CREATING A MANAGED EXTENSIONS APPLICATION Chapter 12 439

{

Graphics* g = CreateGraphics();

g->FillEllipse(pDoc->GetCurBrush(), pDoc->nShapeLeft, pDoc->nShapeTop, pDoc->nShapeWidth, pDoc->nShapeHeight);

}

catch (Exception* ex) { MessageBox::Show(ex->ToString());

}

}

void CGDIPlusView::HandleFilledRectDraw()

{

try

{

Graphics* g = CreateGraphics();

g->FillRectangle(pDoc->GetCurBrush(), pDoc->nShapeLeft, pDoc->nShapeTop, pDoc->nShapeWidth, pDoc->nShapeHeight);

}

catch (Exception* ex) { MessageBox::Show(ex->ToString());

}

}

void CGDIPlusView::HandleTextDraw(String* pStr, Drawing::Font* pFont, Color colorText)

{

try

{

Point* p = __nogc new Point(20, 20); __box Point* pt = __box(*p);

Graphics* g = CreateGraphics();

g->DrawString(pStr, pFont, GetDocument()->GetCurBrush(), *pt);

}

catch (Exception* ex) { MessageBox::Show(ex->ToString());

}

}