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<TITLE>Menu - Owner Drawn Menu with Icons (2)</TITLE>
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<FONT COLOR="#AOAO99">Owner Drawn Menu with Icons (2)</FONT></H3></CENTER>
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This code was contributed by <A HREF="mailto:BenA@sirplc.co.uk">Ben Ashley</A>.
<p>This code is an extension to Girish Bharadwaj's Owner Drawn
menu. The code he produced does not lack anything, but I thought
it would be advantageous to the user to be able to load a Menu
Resource in. Currently, you have to construct the menu yourself,
item-by-item. This can be very time consuming. Instead, I have
introduced 4 new functions to the Owner Drawn menu class...</p>
<ol>
<li>AppendODMenu(). Appends an Owner-Drawn Item to the menu.
You can pass an icon, a selected icon and a disabled
icon.</li>
<li>ModifyODMenu(), as above but modifies an existing menu
given it's command Identifier (Not positional
information)</li>
<li>LoadMenu(int) & LoadMenu(LPCTSTR). Given a menu
resource, these commands (which effectively replace
CMenu's LoadMenu()), will load the specified menu
resource, creating each item as an owner-drawn item. You
may then use the ModifyODMenu() member function to assign
icon states to the items. It is not possible at this time
to specify icons within the menu resource, although I
suspect it is possible by defining a custom resource
type. This is something I will be looking in to in the
next few weeks.</li>
</ol>
<p>Some problems the new code does <em>not</em> address, is the
drawing of separators, checkboxes or the correct placement of the
shortcut key text. This is also something I will be looking at,
but of course, anyone else is free to implement it.</p>
<p>As I renamed the menu class TCMenu, just giving you the added
snippets is probably not enough. It is for this reason that the
entire code is here. Apart from a few changes to the drawing
behaviour of the menu, I have only added those functions
mentioned above. The rest of the code must be credited to Girish
Bharadwaj.</p>
<h2>The header file.... (TCMenu.h)...</h2>
<p> </p>
<pre><font color="#990000">/*
===============================================================================
CMenu
TCMenu
--------------- </font></pre>
<pre><font color="#990000">Implements Owner-drawn menu behaviour
===============================================================================
*/
</font></pre>
<pre><font color="#990000">#ifndef TCMENU_H
#define TCMENU_H
</font></pre>
<pre><font color="#990000">// TCMenuData class. Fill this class structure to define a single menu item:
</font></pre>
<pre><font color="#990000">class TCMenuData
{
public:
TCMenuData () { menuIconNormal = -1; menuIconSelected = -1; menuIconDisabled = -1;nID=0;};
char menuText[32];
UINT menuIconNormal;
UINT menuIconSelected;
UINT menuIconDisabled;
UINT nID;
};
</font></pre>
<pre><font color="#990000">typedef enum {Normal,TextOnly} HIGHLIGHTSTYLE;
</font></pre>
<pre><font color="#990000">class TCMenu : public CMenu // Derived from CMenu
{
// Construction
public:
TCMenu(); </font></pre>
<pre><font color="#990000">// Attributes
protected:
CTypedPtrArray<CPtrArray, TCMenuData*> m_MenuList; // Stores list of menu items </font></pre>
<pre><font color="#990000">// When loading an owner-drawn menu using a Resource, TCMenu must keep track of
// the popup menu's that it creates. Warning, this list *MUST* be destroyed
// last item first :)
</font></pre>
<pre><font color="#990000">CTypedPtrArray<CPtrArray, TCMenu*> m_SubMenus; // Stores list of sub-menus </font></pre>
<pre><font color="#990000">// Operations
public: </font></pre>
<pre><font color="#990000">// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CCustomMenu)
//}}AFX_VIRTUAL </font></pre>
<pre><font color="#990000">// Implementation
public:
virtual ~TCMenu(); // Virtual Destructor </font></pre>
<pre><font color="#990000">// Drawing: </font></pre>
<pre><font color="#990000">virtual void DrawItem( LPDRAWITEMSTRUCT); // Draw an item
virtual void MeasureItem( LPMEASUREITEMSTRUCT ); // Measure an item
</font></pre>
<pre><font color="#990000">// Custamizing:
</font></pre>
<pre><font color="#990000">void SetTextColor (COLORREF ); // Set the text color
void SetBackColor (COLORREF); // Set background color
void SetHighlightColor (COLORREF); // Set highlight Color
void SetIconSize (int, int); // Set icon size
void SetHighlightStyle (HIGHLIGHTSTYLE ); // Set Highlight style
void SetHighlightTextColor (COLORREF); // Set Highlight text color
</font></pre>
<pre><font color="#990000">virtual BOOL AppendODMenu(LPCTSTR lpstrText,
UINT nFlags = MF_OWNERDRAW,
UINT nID = 0,
UINT nIconNormal = -1,
UINT nIconSelected = -1,
UINT nIconDisabled = -1); // Owner-Drawn Append </font></pre>
<pre><font color="#990000">virtual BOOL ModifyODMenu(LPCTSTR lpstrText,
UINT nID = 0,
UINT nIconNormal = -1,
UINT nIconSelected = -1,
UINT nIconDisabled = -1); // Owner-Drawn Modify </font></pre>
<pre><font color="#990000">virtual BOOL LoadMenu(LPCTSTR lpszResourceName); // Load a menu
virtual BOOL LoadMenu(int nResource); // ... </font></pre>
<pre><font color="#990000">// Destoying:
</font></pre>
<pre><font color="#990000">virtual BOOL DestroyMenu();
</font></pre>
<pre><font color="#990000">// Generated message map functions
protected:
COLORREF m_crText;
COLORREF m_clrBack;
COLORREF m_clrText;
COLORREF m_clrHilight;
COLORREF m_clrHilightText;
LOGFONT m_lf;
CFont m_fontMenu;
UINT m_iMenuHeight;
BOOL m_bLBtnDown;
CBrush m_brBackground,m_brSelect;
CPen m_penBack;
int m_iconX,m_iconY;
HIGHLIGHTSTYLE m_hilightStyle; </font></pre>
<pre><font color="#990000">//{{AFX_MSG(CCustomMenu)
// NOTE - the ClassWizard will add and remove member functions here.
//}}AFX_MSG
}; </font></pre>
<pre><font color="#990000">///////////////////////////////////////////////////////////////////////////
// </font></pre>
<pre><font color="#990000">//{{AFX_INSERT_LOCATION}}
// Microsoft Developer Studio will insert additional declarations immediately before the previous line. </font></pre>
<pre><font color="#990000">#endif // CCUSTOMMENU_H </font></pre>
<h2>The Implementation File (TCMenu.cpp)</h2>
<p> </p>
<pre><font color="#990000">//*************************************************************************</font></pre>
<pre><font color="#990000">// TCMenu.cpp : implementation file
//
#include "stdafx.h" // Standard windows header file
#include "TCMenu.h" // TCMenu class declaration
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/*
=================================================================================
TCMenu::TCMenu()
TCMeny::~TCMenu()
-----------------
Constructor and Destructor.
=================================================================================
*/
TCMenu::TCMenu()
{
m_clrText = GetSysColor (COLOR_MENUTEXT); // Default menu text colour
m_clrBack = GetSysColor (COLOR_MENU);
m_brBackground.CreateSolidBrush (m_clrBack);
m_penBack.CreatePen (PS_SOLID,0,m_clrBack);
m_crText = m_clrText;
m_bLBtnDown = FALSE;
m_iconX = 16; // Icon sizes default to 16 x 16
m_iconY = 16; // ...
m_clrHilight = GetSysColor (COLOR_HIGHLIGHT); // User Colours...
m_brSelect.CreateSolidBrush (m_clrHilight); // Create a brush
m_clrHilightText = GetSysColor (COLOR_HIGHLIGHTTEXT); // User Colours...
ZeroMemory ((PVOID) &m_lf,sizeof (LOGFONT));
NONCLIENTMETRICS nm;
nm.cbSize = sizeof (NONCLIENTMETRICS);
//Get the system metrics for the Captionfromhere
VERIFY (SystemParametersInfo (SPI_GETNONCLIENTMETRICS,0,&nm,0));
m_lf = nm.lfMenuFont;
m_iMenuHeight = nm.iMenuHeight;
m_fontMenu.CreateFontIndirect (&m_lf);
}
TCMenu::~TCMenu()
{
DestroyMenu();
}
BOOL TCMenu::DestroyMenu()
{
// Destroy Sub menus:
int m;
int numSubMenus = m_SubMenus.GetUpperBound();
for(m = numSubMenus; m >= 0; m--)
delete(m_SubMenus[m]);
m_SubMenus.RemoveAll();
// Destroy brushes:
if ((HBRUSH) m_brBackground != NULL) // Background brush
m_brBackground.DeleteObject ();
if ((HFONT)m_fontMenu !=NULL) // Font for the menu
m_fontMenu.DeleteObject ();
if ((HBRUSH)m_brSelect != NULL) // Selected background brush
m_brSelect.DeleteObject ();
// Destroy menu data
int numItems = m_MenuList.GetUpperBound();
for(m = 0; m <= numItems; m++)
delete(m_MenuList[m]);
m_MenuList.RemoveAll();
// Call base-class implementation last:
return(CMenu::DestroyMenu());
};
///////////////////////////////////////////////////////////////////////////
//
// TCMenu message handlers
/*
=================================================================================
void TCMenu::DrawItem(LPDRAWITEMSTRUCT)
---------------------------------------
Called by the framework when a particular item needs to be drawn. We overide
this to draw the menu item in a custom-fashion, including icons and the 3D
rectangle bar.
=================================================================================
*/
void TCMenu::DrawItem (LPDRAWITEMSTRUCT lpDIS)
{
ASSERT(lpDIS != NULL);
CDC* pDC = CDC::FromHandle(lpDIS->hDC);
CRect rect;
HICON hIcon;
COLORREF crText = m_crText;
// draw the colored rectangle portion
rect.CopyRect(&lpDIS->rcItem);
// draw the up/down/focused/disabled state
UINT action = lpDIS->itemAction;
UINT state = lpDIS->itemState;
CString strText;
LOGFONT lf;
lf = m_lf;
CFont dispFont;
CFont *pFont;
//GetWindowText(strText);
if (lpDIS->itemData != NULL)
{
UINT nIconNormal = (((TCMenuData*)(lpDIS->itemData))->menuIconNormal);
UINT nIconSelected = (((TCMenuData*)(lpDIS->itemData))->menuIconSelected);
UINT nIconDisabled = (((TCMenuData*)(lpDIS->itemData))->menuIconDisabled);
strText = (((TCMenuData*) (lpDIS->itemData))->menuText);
if(nIconNormal == -1)
hIcon = NULL;
else
{
hIcon = NULL;
// Obtain the IDs for the appropriate Icons:
if (state & ODS_SELECTED && !(state & ODS_GRAYED)) // Selected (but not disabled)
{
if(nIconSelected != -1)
hIcon = AfxGetApp ()->LoadIcon(nIconSelected);
}
else
{
if(state & ODS_GRAYED) // Disabled (selected or not)
if(nIconDisabled != -1)
hIcon = AfxGetApp()->LoadIcon(nIconDisabled);
};
// If we didn't manage to select a specific icon, we'll use the
// default (normal) one...
if(hIcon == NULL)
hIcon = AfxGetApp()->LoadIcon(nIconNormal);
}
}
else
{
strText.Empty();
hIcon = NULL;
}
if ( (state & ODS_SELECTED) )
{
// draw the down edges
CPen *pOldPen = pDC->SelectObject (&m_penBack);
// You need only Text highlight and thats what you get
if (m_hilightStyle != Normal)
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