Button color picker (like Excel)

I recently wanted to allow certain color selection in one of my 16 bits projects like Excel offers in it's toolbar. The following code acomplishes exactly that. My projet is a 16 bits application so the exemple is in 16 bits build with MSVC 1.52, but I sure you can recompile it in 32 bits.

Just include the ComboBtn.h and ComboBtn.cpp files in your project and create a control member variable. Here's a preview of the button and the implementation in a toolbar.

Download sample and source 85KB

// mainfrm.h : interface of the CMainFrame class
//
/////////////////////////////////////////////////////////////////////////////
#include "combobtn.h"

class CMainFrame : public CMDIFrameWnd
{
	DECLARE_DYNAMIC(CMainFrame)
public:
	CMainFrame();

// Attributes
public:
	CButtonCombo m_colorBtn;
	CButtonCombo m_bitmapBtn;

// Operations
public:

// Implementation
public:
	virtual ~CMainFrame();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:  // control bar embedded members
	CStatusBar  m_wndStatusBar;
	CToolBar    m_wndToolBar;

// Generated message map functions
protected:
	//{{AFX_MSG(CMainFrame)
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
		// NOTE - the ClassWizard will add and remove member functions here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

// in mainfrm.cpp

// toolbar buttons - IDs are command buttons
static UINT BASED_CODE buttons[] =
{
	// same order as in the bitmap 'toolbar.bmp'
	ID_FILE_NEW,
	ID_FILE_OPEN,
	ID_FILE_SAVE,
		ID_SEPARATOR,
	ID_EDIT_CUT,
	ID_EDIT_COPY,
	ID_EDIT_PASTE,
		ID_SEPARATOR,
		ID_SEPARATOR,	// Color Button
		ID_SEPARATOR,
		ID_SEPARATOR,	// Bitmap Button
		ID_SEPARATOR,
	ID_FILE_PRINT,
	ID_APP_ABOUT,
};

static UINT BASED_CODE indicators[] =
{
	ID_SEPARATOR,           // status line indicator
	ID_INDICATOR_CAPS,
	ID_INDICATOR_NUM,
	ID_INDICATOR_SCRL,
};

#define IDC_BTNCOLOR	1000
#define IDC_BTNBITMAP	1001

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
	// TODO: add member initialization code here
}

CMainFrame::~CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;

	if (!m_wndToolBar.Create(this) ||
		!m_wndToolBar.LoadBitmap(IDR_MAINFRAME) ||
		!m_wndToolBar.SetButtons(buttons,
		  sizeof(buttons)/sizeof(UINT)))
	{
		TRACE("Failed to create toolbar\n");
		return -1;      // fail to create
	}

	m_wndToolBar.SetButtonInfo(8, IDC_BTNCOLOR, TBBS_SEPARATOR, 48 );
	m_wndToolBar.SetButtonInfo(10, IDC_BTNBITMAP, TBBS_SEPARATOR, 48 );
	
	m_wndToolBar.SetButtonInfo(9, ID_SEPARATOR, TBBS_SEPARATOR, 12 );
	m_wndToolBar.SetButtonInfo(11, ID_SEPARATOR, TBBS_SEPARATOR, 12 );
	CRect rect;
	m_wndToolBar.GetItemRect(8, &rect);

	CString sText = ""; 
	char buffer[5];
	for (int i = 0; i < 72; i++)
		sText += "Color " + CString(itoa(i, buffer, 10)) + ((i < 71)? ";" : "");

	m_colorBtn.Create(rect, CSize(8, 6), CSize(16, 15), &m_wndToolBar, IDC_BTNCOLOR);
//	If you want the text for each color use this line 
//	m_colorBtn.Create(rect, CSize(8, 6), CSize(16, 15), &m_wndToolBar, IDC_BTNCOLOR, sText);

	sText.LoadString(IDS_STRINGCHART);	
	m_wndToolBar.GetItemRect(10, &rect);
	m_bitmapBtn.Create(rect, CSize(4, 4), IDB_CHART, 14, &m_wndToolBar, IDC_BTNBITMAP, sText);

	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		  sizeof(indicators)/sizeof(UINT)))
	{
		TRACE("Failed to create status bar\n");
		return -1;      // fail to create
	}

	return 0;
}