Pole vlastni tridy – C / C++ – Fórum – Programujte.com

udelal sem si vlastni tridu WbdPanel a chtel bych vytvorit pole kde budou ulozeny instance teto tridy. zkousel sem

WbdPanel * Panels;

Panels = new WbdPanel[10];

WbdPanel * tmpPanel = new Panel( this, Bitmap );

Panels[1] = tmpPanel //tak tady mi to hazi chybu

To MadMaxx: resit nejlepe pres knihovnu STL a treba vector

[podtrzene]Builder :[/podtrzene]
http://www.builder.cz/art/cpp/cpp_vector.html

Ma ta trieda aj konstruktor bez argumentov ?

chybu ti to hadze pretoze si vytvoril pole WbdPanel-ov a snazis na do jeho prvku pridat ukazatel na WbdPanel

a jak to mam pls udelat?

at uz s vektorem, nebo polem...

kdyz to zkousim pres ten vektor, tak mi to napise tohle:

1>d:\programovani\wbd3\wbd3\WbdFrame.h(79) : error C2248: 'wxPanel::wxPanel' : cannot access private member declared in class 'wxPanel' //a kdyz clicknu sem, tak me to hodi na **1**
1> c:\wxWidgets-2.6.3\include\wx/generic/panelg.h(93) : see declaration of 'wxPanel::wxPanel'
1> c:\wxWidgets-2.6.3\include\wx/generic/panelg.h(34) : see declaration of 'wxPanel'
1> This diagnostic occurred in the compiler generated function 'WbdPanel::WbdPanel(const WbdPanel &)'

class WbdPanel: public wxPanel

{

	public:

		WbdPanel();

		WbdPanel( wxWindow * parent , wxBitmap  bmp );

		~WbdPanel();

		WbdMemDC memory; 

}; // **1**

To MadMaxx:
Mozna by bylo lepsi, kdyby jsi sem postnul i definici tridy(samozreme pokud to neni prisne tajne) a taky priklad s vektorem. Jinak te kompilator upozornuje na to, ze trida wxPanel ma privatni konstruktor.

class WXDLLEXPORT wxPanel : public wxWindow

{

public:

    wxPanel() { Init(); }



    // Old-style constructor (no default values for coordinates to avoid

    // ambiguity with the new one)

    wxPanel(wxWindow *parent,

            int x, int y, int width, int height,

            long style = wxTAB_TRAVERSAL | wxNO_BORDER,

            const wxString& name = wxPanelNameStr)

    {

        Init();



        Create(parent, wxID_ANY, wxPoint(x, y), wxSize(width, height), style, name);

    }



    // Constructor

    wxPanel(wxWindow *parent,

            wxWindowID winid = wxID_ANY,

            const wxPoint& pos = wxDefaultPosition,

            const wxSize& size = wxDefaultSize,

            long style = wxTAB_TRAVERSAL | wxNO_BORDER,

            const wxString& name = wxPanelNameStr)

    {

        Init();



        Create(parent, winid, pos, size, style, name);

    }



    // Pseudo ctor

    bool Create(wxWindow *parent, wxWindowID winid,

                const wxPoint& pos = wxDefaultPosition,

                const wxSize& size = wxDefaultSize,

                long style = wxTAB_TRAVERSAL | wxNO_BORDER,

                const wxString& name = wxPanelNameStr);



    virtual ~wxPanel();



    // implementation from now on

    // --------------------------



        // calls layout for layout constraints and sizers

    void OnSize(wxSizeEvent& event);



    virtual void InitDialog();



#ifdef __WXUNIVERSAL__

    virtual bool IsCanvasWindow() const { return true; }

#endif





    WX_DECLARE_CONTROL_CONTAINER();



protected:

    // common part of all ctors

    void Init();



private:

    DECLARE_DYNAMIC_CLASS_NO_COPY(wxPanel)

    DECLARE_EVENT_TABLE()

};

Pardon, ja myslel definici tridy WbdPanel. Krom toho jak vidim, je tohle sice jen deklarace, ale presto jsem se zmylil v tom, ze ten konstruktor je privatni(jak vidno je public).

tu definici WbdPanel mas hore,

class WbdPanel: public wxPanel

To MadMaxx:
staci ten pinter dereferencovat a si za vodou ;) (help: operator *)

dereferencovat? pls napis sem nakej priklad, thx

To MadMaxx:

int x = 5;

cout << x << endl;

int* px = &x;

cout << px << endl

       << *px << endl; // ta * je operator dereferencie, tj z pointeru dostanes hodnotu a nie iba adresu :)

Pokud dobre chapu, tak tohle by melo bejt dobre?

WbdPanel * Panels;

Panels = new WbdPanel[10];

WbdPanel * tmpPanel = new Panel( this, Bitmap );

Panels[1] = * tmpPanel;

hm, tak nefacha, pise to:

d:\programovani\wbd3\wbd3\wbdframe.cpp(158) : error C2679: binary '=' : no operator found which takes a right-hand operand of type 'WbdPanel *' (or there is no acceptable conversion)
1> d:\programovani\wbd3\wbd3\wbdframe.h(79): could be 'WbdPanel &WbdPanel::operator =(const WbdPanel &)'
1> while trying to match the argument list '(WbdPanel, WbdPanel *)'

To MadMaxx: Nemas spravne pretizen operator prirazeni. Jinak to co jsi psal, ze je definice, tak je ve skutecnosti jen deklarace.
Definenice obyvkle, pokud teda nedelas inline fce, vypada asi nejak takto:

void a::setA(int a)

{ m_a = a;

}

Jen na doplneni, az si spravne pretiyis operator prirayeni a napises kopirovaci konstruktor(ma-li tam byt), tak pak staci pouzit vector.

#include <vector>

//...

std::vector<WbdPanels*> v; 

v.push_back(new WbdPanel(this, Bitmap)); 



// a dealokace

for(vector<WbdPanels*>::iterator i=v.begin(); i!=v.end(); ++i) delete *i; 

mno praveze bude asi problem s tim kopirovacim konstruktorem.... nak nevim co do nej napsat.....

To MadMaxx: Ja teda s wxWindows nepracuju, ale jak se tak koukam, tak s tim operatorem prirazeni a kopirovacim konstruktorem to nebude tak jednoduche. Totiz nevim, co znamena makro DECLARE_DYNAMIC_CLASS_NO_COPY(wxPanel), ale podle nazvu usuzuju, ze ta trida wxPanel neni urcena pro jakekoliv kopirovani(ma tedy privatni jak cpy-constr, tak operator= ).

a kdybych chtel nekde jen ulozit ukazatele na WbdPanel?

To MadMaxx: V tom pripade staci pouzit jiz vyse zmineny kod(s tim vektorem) a melo by to fungovat. Jinak ovsem obecne by cokokliv, co cpes do containeru melo mit definovan kopy construcor a opertator prirazeni(kvuli kopirovani).