// LinkButton.cpp

#include "stdafx.h"
#include "LinkButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CLinkButton

BEGIN_MESSAGE_MAP(CLinkButton, CButton)
  //{{AFX_MSG_MAP(CLinkButton)
  ON_WM_ERASEBKGND()
  ON_WM_MOUSEMOVE()
  ON_WM_LBUTTONDBLCLK()
  ON_WM_LBUTTONDOWN()
  ON_WM_LBUTTONUP()
  ON_WM_SETFOCUS()
  ON_WM_KILLFOCUS()
  //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLinkButton message handlers

void CLinkButton::OnLButtonDown(UINT nFlags, CPoint point) {
  if(!IsWindowEnabled()) return;
  LButtonDown=true;
  SetFocus();
  CButton::OnLButtonDown(nFlags, point);
}

void CLinkButton::OnLButtonDblClk(UINT nFlags, CPoint point) {
  if(!IsWindowEnabled()) return;
  LButtonDown=true;
  SetFocus();
  CButton::OnLButtonDblClk(nFlags, point);
}

void CLinkButton::OnMouseMove(UINT nFlags, CPoint point) {
  if(!IsWindowEnabled()) return;
  bool Over=MouseOver;
  if(!MouseOver) {
    MouseOver=true;
    if(!Captured) {
      SetCapture();
      Captured=true;
  } }
  if(Captured) {
    CRect Rect;
    GetClientRect(Rect);
    if(!Rect.PtInRect(point)) {
      MouseOver=false;
      if(!LButtonDown) { //We can't release it if the Left button is being held down
        ReleaseCapture();
        Captured=false;
  } } }
  if(Over!=MouseOver) { // If the mouse moved in or out of our ClientRect:
    Cursor=::SetCursor(Cursor); //Swap the value of Cursor as we swap Cursors
    Redraw();
  }
  CButton::OnMouseMove(nFlags, point);
}

void CLinkButton::OnLButtonUp(UINT nFlags, CPoint point) {
  bool Clicked=false;
  if(Captured) {
    ReleaseCapture();
    Captured=false;
    if(LButtonDown) {
      CRect Rect;
      GetClientRect(Rect);
      if(Rect.PtInRect(point)) Clicked=true;
  } }
  LButtonDown=false;
  if(Clicked) {
    MouseOver=false; // Releasing the button releases the resources:
    Cursor=::SetCursor(Cursor); //Swap the value of Cursor as we swap Cursors
    Redraw();
    GetOwner()->SendMessage(WM_COMMAND, GetDlgCtrlID());
  }else CButton::OnLButtonUp(nFlags, point);
}

BOOL CLinkButton::OnEraseBkgnd(CDC* pDC) {return true;} //  return CButton::OnEraseBkgnd(pDC);}

void CLinkButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) {
  CDC* pDC=CDC::FromHandle(lpDrawItemStruct->hDC); // device context for painting
  if(MouseOver || KeyDown) {
    pDC->SelectObject(LinkFont);
    pDC->SetTextColor(LinkColor);
  }else{
    pDC->SelectObject(TextFont);
    pDC->SetTextColor(TextColor);
  }
  pDC->FillSolidRect(&lpDrawItemStruct->rcItem, Focus ? FocusColor : ButtonColor);
  if(!IsWindowVisible()) return;
  CString S;
  GetWindowText(S);
  lpDrawItemStruct->rcItem.left=5;
  pDC->DrawText(S, &lpDrawItemStruct->rcItem, DT_LEFT|DT_SINGLELINE|DT_VCENTER);
}

void CLinkButton::OnSetFocus(CWnd* pOldWnd) {
  Focus=true;
  CButton::OnSetFocus(pOldWnd);
}

void CLinkButton::OnKillFocus(CWnd* pNewWnd) {
  Focus=false;
  CButton::OnKillFocus(pNewWnd);
}

BOOL CLinkButton::PreTranslateMessage(MSG* pMsg) {
  if(pMsg->wParam ==VK_RETURN) { //Let the Return and Enter keys operate the button when it has focus
    if(pMsg->message==WM_KEYDOWN) {
      if(KeyDown) return true;
      KeyDown=true;
      Redraw();
      GetOwner()->PostMessage(WM_COMMAND, GetDlgCtrlID());
    }else{
      KeyDown=false;
      Redraw();
    }
    return true;
  }
  return CButton::PreTranslateMessage(pMsg);
}