src/button.cpp

Go to the documentation of this file.

/*
* 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 "image.h"
#include "icon.h"
#include "eventhandler.h"
#include "widgets.h"
#include "menu.h"
#include "widget.h"
#include "button.h"
#include "exception.h"
namespace MWidgets
{
        /*******************************************************************************/
        Button::Button():Widget()
        {
                m_bFlat=false;
                m_pOnClickHandler=NULL;
                m_bMouseHover=false;
        };
        /*******************************************************************************/
        Button::~Button()
        {
                if(m_pOnClickHandler!=NULL)
                        delete m_pOnClickHandler;
        };
        /*******************************************************************************/
        void Button::Create(Widget *parent,int x,int y,int w,int h,string caption,string tooltip,bool bflat)
        {
                Widget::Create(x,y,w,h,caption,"BUTTON",WS_CHILD|BS_PUSHBUTTON|WS_TABSTOP|WS_CLIPSIBLINGS,parent->GetHwnd());
                m_bFlat=false;
                if(bflat)
                {
                        LONG styles=GetWindowLong(m_hWnd,GWL_STYLE);
                        styles|=BS_FLAT;
                        SetWindowLong(m_hWnd,GWL_STYLE,styles);
                        m_bFlat=true;
                }

                m_sToolTip=tooltip;
                TOOLINFO ti;                            // struct specifying info about tool in ToolTip control
                RECT rect;                  // for client area coordinates

                /* CREATE A TOOLTIP WINDOW */
                m_hWndTT = CreateWindowEx(WS_EX_TOPMOST,
                TOOLTIPS_CLASS,
                NULL,
                WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,
                CW_USEDEFAULT,
                CW_USEDEFAULT,
                CW_USEDEFAULT,
                CW_USEDEFAULT,
                m_hWnd,
                NULL,
                m_hInstance,
                NULL
                );

                SetWindowPos(m_hWndTT,HWND_TOPMOST,0,0,0,0,SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

                /* GET COORDINATES OF THE MAIN CLIENT AREA */
                GetClientRect (m_hWnd, &rect);

                /* INITIALIZE MEMBERS OF THE TOOLINFO STRUCTURE */
                ti.cbSize = sizeof(TOOLINFO);
                ti.uFlags = TTF_SUBCLASS;
                ti.hwnd = m_hWnd;
                ti.hinst = m_hInstance;
                ti.uId = 0;
                ti.lpszText = (LPSTR)m_sToolTip.c_str();
                // ToolTip control will cover the whole window
                ti.rect.left = rect.left;
                ti.rect.top = rect.top;
                ti.rect.right = rect.right;
                ti.rect.bottom = rect.bottom;

                /* SEND AN ADDTOOL MESSAGE TO THE TOOLTIP CONTROL WINDOW */
                SendMessage(m_hWndTT, TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &ti);

        };
        /*******************************************************************************/
        LRESULT Button::OnMessage (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
        {
                if(message==WM_MOUSELEAVE)
                {
                        m_bMouseHover=false;
                        InvalidateRect(hWnd,NULL,TRUE);
                }
                else if(message==WM_PAINT)
                {
                        if(m_bFlat&&m_bMouseHover)
                        {
                                PAINTSTRUCT ps;
                                RECT rc;
                                GetClientRect(hWnd,&rc);
                                HDC hdc=BeginPaint(hWnd,&ps);
                                HPEN p=CreatePen(PS_DOT,1,RGB(0,0,0));
                                SelectObject(hdc,p);
                                MoveToEx(hdc,2,2,NULL);
                                LineTo(hdc,rc.right-3,2);
                                LineTo(hdc,rc.right-3,rc.bottom-3);
                                LineTo(hdc,2,rc.bottom-3);
                                LineTo(hdc,2,2);
                                DeleteObject(p);
                                EndPaint(hWnd,&ps);
                        };
                }
                else if( message==WM_LBUTTONDOWN || message==WM_MOUSEMOVE   ||
            message==WM_LBUTTONUP   || message==WM_RBUTTONDOWN ||
            message==WM_MBUTTONDOWN || message==WM_RBUTTONUP   ||
            message==WM_MBUTTONUP)
                {
                        if(m_bFlat&&message==WM_MOUSEMOVE)
                        {
                                TRACKMOUSEEVENT tme;
                                tme.cbSize=sizeof(TRACKMOUSEEVENT);
                                tme.dwFlags=TME_LEAVE;
                                tme.dwHoverTime=0;
                                tme.hwndTrack=hWnd;
                                TrackMouseEvent(&tme);
                                if(!m_bMouseHover)
                                        InvalidateRect(hWnd,NULL,TRUE);
                                m_bMouseHover=true;
                        }
                        MSG msg;
                        msg.hwnd=m_hWnd;
                        msg.lParam=lParam;
                        msg.wParam=wParam;
                        msg.message=message;
                        SendMessage(m_hWndTT,TTM_RELAYEVENT, 0,(LPARAM)&msg );
                }
                return Widget::OnMessage(hWnd, message, wParam, lParam);
        };
        /*******************************************************************************/
        void Button::OnCommand( WORD code,WORD  )
        {
                if(code==BN_CLICKED)
                        OnClick();
        };
        /*******************************************************************************/
        void Button::OnClick()
        {
                if(m_pOnClickHandler)
                {
                        m_pOnClickHandler->Call(this);
                }
        };
        /*******************************************************************************/
        void Button::SetImage(Image* pImage)
        {
                LONG styles=GetWindowLong(m_hWnd,GWL_STYLE);
                styles|=BS_BITMAP;
                SetWindowLong(m_hWnd,GWL_STYLE,styles);
                SendMessage(m_hWnd,BM_SETIMAGE ,IMAGE_BITMAP,(LPARAM)pImage->GetHBITMAP());
        };
        /*******************************************************************************/
        WIDGET_TYPE Button::GetType()
        {
                return BUTTON;
        };
        /*******************************************************************************/
        void Button::SetPressed(bool val)
        {
                SendMessage(m_hWnd,BM_SETSTATE,val,0);
        };
        /*******************************************************************************/

};

---