MFC based paint

This is a discussion on MFC based paint within the Windows Programming forums, part of the Platform Specific Boards category; I'm making an MFC based paint as SDI in document view. I need help with making a interface for drawing ...

  1. #1
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    MFC based paint

    I'm making an MFC based paint as SDI in document view. I need help with making a interface for drawing rect , ellipse, etc.( I know the definition of the interface) . It could be helpfull if someone has a good example. I know the drawing functions but I'm not sure how to put all this together. This is what I have in mind:
    ///////////////////////////
    [class IPick { }; // base interface, functions only

    class PickCommon : public IPick {}; // common data members

    class Line : public PickCommon {}; // line specific stuff
    class Rect : public PickCommon {}; // rect specific stuff/]
    /////////////////

    Thanks a lot.

  2. #2
    Registered User Codeplug's Avatar
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    I'm confused. Do you need help with the actual drawing of shapes to the screen?

    gg

  3. #3
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    I know how to draw I need an interface for the drawing and I don't know what functions I need in. I have to make a derived class for drawing like this.
    ////////////////
    [ class Rect : public PickCommon {}; // rect specific stuff/]

    This class is derived from this two and I need some functions in.
    ////////////////
    [ class IPick { }; // base interface, functions only

    class PickCommon : public IPick {}; // common data members /]

  4. #4
    Registered User Codeplug's Avatar
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  5. #5
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    Yes this is helpfull but I need an interface.
    I need all pure virtual functions in base class because I maybe don't need for every tool (line, rect, ellipse) some data members Then I will make derived class from interface and use his functions and add some data members I need.
    I also need this class for saving in DocView class . My idea was to this in std::vector or std::list pointers on my bas class.

    This is my implementation of View class so if this is helpfull I will be very greatfull.

    Code:
    // verz1View.cpp : implementation of the Cverz1View class
    //
    
    #include "stdafx.h"
    #include "verz1.h"
    
    #include "verz1Doc.h"
    #include "verz1View.h"
    
    
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #endif
    
    
    // Cverz1View
    
    IMPLEMENT_DYNCREATE(Cverz1View, CView)
    
    BEGIN_MESSAGE_MAP(Cverz1View, CView)
    	// Standard printing commands
    	ON_COMMAND(ID_FILE_PRINT, &CView::OnFilePrint)
    	ON_COMMAND(ID_FILE_PRINT_DIRECT, &CView::OnFilePrint)
    	ON_COMMAND(ID_FILE_PRINT_PREVIEW, &CView::OnFilePrintPreview)
    
    	//buttoni na toolbaru
    	ON_COMMAND(ID_TBBUTTON1,OnLine)
    	ON_COMMAND(ID_TBBUTTON2,OnRect)
    	ON_COMMAND(ID_TBBUTTON3,OnEllipse)
    	ON_COMMAND(ID_TBBUTTON4,OnPencil)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON1, OnSelectLine)
        ON_UPDATE_COMMAND_UI(ID_TBBUTTON2, OnSelectRect)
        ON_UPDATE_COMMAND_UI(ID_TBBUTTON3, OnSelectEllipse)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON4, OnSelectPencil)
    	ON_COMMAND(ID_TBBUTTON10,OnRed)
    	ON_COMMAND(ID_TBBUTTON11,OnGreen)
    	ON_COMMAND(ID_TBBUTTON12,OnBlue)
    	ON_COMMAND(ID_TBBUTTON13,OnBlack)
    	ON_COMMAND(ID_TBBUTTON14,OnWhite)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON10, OnSelectRed)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON11, OnSelectGreen)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON12, OnSelectBlue)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON13, OnSelectBlack)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON14, OnSelectWhite)
    	ON_COMMAND(ID_TBBUTTON5, OnBrushOn)
    	ON_COMMAND(ID_TBBUTTON6, OnBrushOff)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON5, OnSelectBrushOn)
    	ON_UPDATE_COMMAND_UI(ID_TBBUTTON6, OnSelectBrushOff)
    
    
    
    	ON_WM_LBUTTONDOWN()
    	ON_WM_LBUTTONUP()
    	ON_WM_MOUSEMOVE()
    	
    END_MESSAGE_MAP()
    
    // Cverz1View construction/destruction
    
    Cverz1View::Cverz1View() : bBrushOn(false)
    
    
    {
    
    
    	CurBrush.lbColor = RGB(255,255,255);
    	CurBrush.lbHatch = BS_SOLID;
    	CurBrush.lbStyle = HS_CROSS;
    
    	CurPen.lopnColor = RGB(0,0,0);
    	CurPen.lopnStyle = PS_SOLID;
    	CurPen.lopnWidth.x = 1;
    
    	curTool = ID_TBBUTTON1 ;
    	curColor = ID_TBBUTTON10;
    
    }
    
    Cverz1View::~Cverz1View()
    {
    }
    
    
    
    BOOL Cverz1View::PreCreateWindow(CREATESTRUCT& cs)
    {
    	// TODO: Modify the Window class or styles here by modifying
    	//  the CREATESTRUCT cs
    
    	return CView::PreCreateWindow(cs);
    }
    
    // Cverz1View drawing
    
    void Cverz1View::OnDraw(CDC* pDC)
    {
    	
    	Cverz1Doc* pDoc = GetDocument();
    	ASSERT_VALID(pDoc);
    
    	
    	
    }
    
    
    
    // Cverz1View printing
    
    BOOL Cverz1View::OnPreparePrinting(CPrintInfo* pInfo)
    {
    	// default preparation
    	return DoPreparePrinting(pInfo);
    }
    
    void Cverz1View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
    {
    	// TODO: add extra initialization before printing
    }
    
    void Cverz1View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
    {
    	// TODO: add cleanup after printing
    }
    
    
    // Cverz1View diagnostics
    
    #ifdef _DEBUG
    void Cverz1View::AssertValid() const
    {
    	CView::AssertValid();
    }
    
    void Cverz1View::Dump(CDumpContext& dc) const
    {
    	CView::Dump(dc);
    }
    
    Cverz1Doc* Cverz1View::GetDocument() const // non-debug version is inline
    {
    	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(Cverz1Doc)));
    	return (Cverz1Doc*)m_pDocument;
    }
    #endif //_DEBUG
    
    
    // Cverz1View message handlers
    //////////////////////////////////////////////////////////////////////////////////////////////
    
    
    void Cverz1View::OnLine() {	
    	curTool = ID_TBBUTTON1;
    	
    }
    void Cverz1View::OnRect() {
    	curTool = ID_TBBUTTON2;
    	
    }
    void Cverz1View::OnEllipse() {	
    	curTool = ID_TBBUTTON3;
    	
    }
    void Cverz1View::OnPencil() {	
    	curTool = ID_TBBUTTON4;
    }
    void Cverz1View::OnRed() {	
    	curColor = ID_TBBUTTON10;
    	CurBrush.lbColor = RGB(255,0,0);
    	CurPen.lopnColor = RGB(255,0,0);
    }
    void Cverz1View::OnGreen() {	
    	curColor = ID_TBBUTTON11;
    	CurBrush.lbColor = RGB(0,255,0);
    	CurPen.lopnColor = RGB(0,255,0);
    }
    void Cverz1View::OnBlue() {	
    	curColor = ID_TBBUTTON12;
    	CurBrush.lbColor = RGB(0,0,255);
    	CurPen.lopnColor = RGB(0,0,255);
    
    }
    void Cverz1View::OnBlack() {	
    	curColor = ID_TBBUTTON13;
    	CurBrush.lbColor = RGB(0,0,0);
    	CurPen.lopnColor = RGB(0,0,0);
    }
    void Cverz1View::OnWhite() {	
    	curColor = ID_TBBUTTON14;
    	CurBrush.lbColor = RGB(255,255,255);
    	CurPen.lopnColor = RGB(255,255,255);
    }
    void Cverz1View::OnBrushOn() 
    {
    	
    bBrushOn=true;	//select brush
    CurBrush.lbStyle=BS_SOLID;
    }
    
    void Cverz1View::OnBrushOff() 
    {
    bBrushOn=false;	//select null brush
    CurBrush.lbStyle=BS_NULL;
    }
    
    void Cverz1View::OnSelectBrushOn(CCmdUI* pCmdUI) 
    {
    pCmdUI->SetCheck(bBrushOn);	
    }
    
    void Cverz1View::OnSelectBrushOff(CCmdUI* pCmdUI) 
    {
    pCmdUI->SetCheck(!bBrushOn);	
    }
    
    /////////////////////////////////////////////////////////////////
    //   postavljanje flagova za oznaku pritisnutog buttona
    void Cverz1View::OnSelectLine(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curTool == ID_TBBUTTON1 ? 1 : 0);
    }
    void Cverz1View::OnSelectRect(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curTool == ID_TBBUTTON2 ? 1 : 0);
    }
    void Cverz1View::OnSelectEllipse(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curTool == ID_TBBUTTON3 ? 1 : 0);
    }
    void Cverz1View::OnSelectPencil(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curTool == ID_TBBUTTON4 ? 1 : 0);
    }
    void Cverz1View::OnSelectRed(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curColor == ID_TBBUTTON10 ? 1 : 0);
    }
    void Cverz1View::OnSelectGreen(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curColor == ID_TBBUTTON11 ? 1 : 0);
    }
    void Cverz1View::OnSelectBlue(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curColor == ID_TBBUTTON12 ? 1 : 0);
    }
    void Cverz1View::OnSelectBlack(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curColor == ID_TBBUTTON13 ? 1 : 0);
    }
    void Cverz1View::OnSelectWhite(CCmdUI *pCmdUI) {
    	pCmdUI->SetCheck(curColor == ID_TBBUTTON14 ? 1 : 0);
    }
    
    
    void Cverz1View::OnLButtonDown(UINT nFlags, CPoint point)
    {
    Cverz1Doc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    // saving mouse position on button down
    Point.x = point.x;
    Point.y = point.y;
    
    // tu bi išla logika za crtanje
    switch(curTool) {
    	
    		
    }
    
    
    	CView::OnLButtonDown(nFlags, point);
    }
    
    void Cverz1View::OnLButtonUp(UINT nFlags, CPoint point)
    {
    	// TODO: Add your message handler code here and/or call default
    
    	CView::OnLButtonUp(nFlags, point);
    }
    
    void Cverz1View::OnMouseMove(UINT nFlags, CPoint point)
    {
    	// TODO: Add your message handler code here and/or call default
    
    	CView::OnMouseMove(nFlags, point);
    }

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