src/combobox.cpp

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/*
* Copyright (c) 2006 by Kirill Kolodyazhniy.
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/

#include "stdinc.h"
#include "icon.h"
#include "eventhandler.h"
#include "widgets.h"
#include "menu.h"
#include "widget.h"
#include "combobox.h"
#include "exception.h"
namespace MWidgets
{

        /*******************************************************************************/
        ComboBox::ComboBox():Widget()
        {
                m_pOnChangeHandler=NULL;
        };
        /*******************************************************************************/
        ComboBox::~ComboBox()
        {
                if(m_pOnChangeHandler)
                        delete m_pOnChangeHandler;
        };
        /*******************************************************************************/
        void ComboBox::Create(Widget *parent,int x,int y,int w,int h)
        {
                Widget::Create(x,y,w,h,"","COMBOBOX",WS_CHILD|WS_BORDER|WS_TABSTOP|WS_VSCROLL|CBS_AUTOHSCROLL|CBS_DROPDOWN|WS_CLIPSIBLINGS,parent->GetHwnd());
        };
        /*******************************************************************************/
        LRESULT ComboBox::OnMessage (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
        {
                string str;
                if(message!=WM_GETTEXTLENGTH&&message!=WM_GETTEXT)
                        str=GetText();

                LRESULT rez=Widget::OnMessage(hWnd, message, wParam,lParam);

                if(message!=WM_GETTEXTLENGTH&&message!=WM_GETTEXT&&message!=WM_DESTROY&&message!=WM_NCDESTROY)
                        if(GetText().compare(str)!=0)
                                OnChange();
                return rez;
        };
        /*******************************************************************************/
        void ComboBox::OnCommand( WORD code,WORD  )
        {
                if(code==CBN_EDITCHANGE)
                        OnChange();
        };
        /*******************************************************************************/
        void ComboBox::OnChange()
        {
                if(m_pOnChangeHandler)
                {
                        m_pOnChangeHandler->Call(this);
                }
        };
        /*******************************************************************************/
        int ComboBox::AddString(string str)
        {
                int rez=(int)SendMessage(m_hWnd,CB_ADDSTRING,0,(LPARAM)str.c_str());
                if(rez!=CB_ERR)
                        return rez;
                return -1;
        };
        /*******************************************************************************/
        void ComboBox::DelString(int index)
        {
                SendMessage(m_hWnd,CB_DELETESTRING,index,0);
        };
        /*******************************************************************************/
        void ComboBox::Clear()
        {
                SendMessage(m_hWnd, CB_RESETCONTENT, 0, 0);
        };
        /*******************************************************************************/
        int ComboBox::GetItemsCount()
        {
                int rez=(int)SendMessage(m_hWnd,CB_GETCOUNT,0,0);
                if(rez!=CB_ERR)
                        return rez;
                return -1;
        };
        /*******************************************************************************/
        WIDGET_TYPE ComboBox::GetType()
        {
                return COMBOBOX;
        };
        /*******************************************************************************/
};

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