High-speed-Charting-Control/ChartDemo/ColourPicker/ColourPicker.cpp

310 lines
9.7 KiB
C++

// ColourPicker.cpp : implementation file
//
// ColourPicker is a drop-in colour picker control. Check out the
// header file or the accompanying HTML doc file for details.
//
// Written by Chris Maunder (chrismaunder@codeguru.com)
// Extended by Alexander Bischofberger (bischofb@informatik.tu-muenchen.de)
// Copyright (c) 1998.
//
// This code may be used in compiled form in any way you desire. This
// file may be redistributed unmodified by any means PROVIDING it is
// not sold for profit without the authors written consent, and
// providing that this notice and the authors name is included. If
// the source code in this file is used in any commercial application
// then a simple email would be nice.
//
// This file is provided "as is" with no expressed or implied warranty.
// The author accepts no liability if it causes any damage to your
// computer, causes your pet cat to fall ill, increases baldness or
// makes you car start emitting strange noises when you start it up.
//
// Expect bugs.
//
// Please use and enjoy. Please let me know of any bugs/mods/improvements
// that you have found/implemented and I will fix/incorporate them into this
// file.
//
// Updated 16 May 1998
// 31 May 1998 - added Default text (CJM)
// 9 Jan 1999 - minor vis update
#include "stdafx.h"
#include "ColourPopup.h"
#include "ColourPicker.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
void AFXAPI DDX_ColourPicker(CDataExchange *pDX, int nIDC, COLORREF& crColour)
{
HWND hWndCtrl = pDX->PrepareCtrl(nIDC);
ASSERT (hWndCtrl != NULL);
CColourPicker* pColourPicker = (CColourPicker*) CWnd::FromHandle(hWndCtrl);
if (pDX->m_bSaveAndValidate)
{
crColour = pColourPicker->GetColour();
}
else // initializing
{
pColourPicker->SetColour(crColour);
}
}
/////////////////////////////////////////////////////////////////////////////
// CColourPicker
CColourPicker::CColourPicker()
{
SetBkColour(GetSysColor(COLOR_3DFACE));
SetTextColour(GetSysColor(COLOR_BTNTEXT));
m_bTrackSelection = FALSE;
m_nSelectionMode = CP_MODE_BK;
m_bActive = FALSE;
m_strDefaultText = _T("Automatic");
m_strCustomText = _T("More Colours...");
}
CColourPicker::~CColourPicker()
{
}
IMPLEMENT_DYNCREATE(CColourPicker, CButton)
BEGIN_MESSAGE_MAP(CColourPicker, CButton)
//{{AFX_MSG_MAP(CColourPicker)
ON_CONTROL_REFLECT_EX(BN_CLICKED, OnClicked)
ON_WM_CREATE()
//}}AFX_MSG_MAP
ON_MESSAGE(CPN_SELENDOK, OnSelEndOK)
ON_MESSAGE(CPN_SELENDCANCEL, OnSelEndCancel)
ON_MESSAGE(CPN_SELCHANGE, OnSelChange)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CColourPicker message handlers
LONG CColourPicker::OnSelEndOK(UINT lParam, LONG /*wParam*/)
{
COLORREF crNewColour = (COLORREF) lParam;
m_bActive = FALSE;
SetColour(crNewColour);
CWnd *pParent = GetParent();
if (pParent) {
pParent->SendMessage(CPN_CLOSEUP, lParam, (WPARAM) GetDlgCtrlID());
pParent->SendMessage(CPN_SELENDOK, lParam, (WPARAM) GetDlgCtrlID());
}
if (crNewColour != GetColour())
if (pParent) pParent->SendMessage(CPN_SELCHANGE, lParam, (WPARAM) GetDlgCtrlID());
return TRUE;
}
LONG CColourPicker::OnSelEndCancel(UINT lParam, LONG /*wParam*/)
{
m_bActive = FALSE;
SetColour((COLORREF) lParam);
CWnd *pParent = GetParent();
if (pParent) {
pParent->SendMessage(CPN_CLOSEUP, lParam, (WPARAM) GetDlgCtrlID());
pParent->SendMessage(CPN_SELENDCANCEL, lParam, (WPARAM) GetDlgCtrlID());
}
return TRUE;
}
LONG CColourPicker::OnSelChange(UINT lParam, LONG /*wParam*/)
{
if (m_bTrackSelection) SetColour((COLORREF) lParam);
CWnd *pParent = GetParent();
if (pParent) pParent->SendMessage(CPN_SELCHANGE, lParam, (WPARAM) GetDlgCtrlID());
return TRUE;
}
int CColourPicker::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CButton::OnCreate(lpCreateStruct) == -1)
return -1;
SetWindowSize(); // resize appropriately
return 0;
}
// On mouse click, create and show a CColourPopup window for colour selection
BOOL CColourPicker::OnClicked()
{
m_bActive = TRUE;
CRect rect;
GetWindowRect(rect);
new CColourPopup(CPoint(rect.left, rect.bottom), // Point to display popup
GetColour(), // Selected colour
this, // parent
m_strDefaultText, // "Default" text area
m_strCustomText); // Custom Text
CWnd *pParent = GetParent();
if (pParent)
pParent->SendMessage(CPN_DROPDOWN, (LPARAM)GetColour(), (WPARAM) GetDlgCtrlID());
// Docs say I should return FALSE to stop the parent also getting the message.
// HA! What a joke.
return TRUE;
}
void CColourPicker::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
ASSERT(lpDrawItemStruct);
CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
CRect rect = lpDrawItemStruct->rcItem;
UINT state = lpDrawItemStruct->itemState;
CString m_strText;
CSize Margins(::GetSystemMetrics(SM_CXEDGE), ::GetSystemMetrics(SM_CYEDGE));
// Draw arrow
if (m_bActive) state |= ODS_SELECTED;
pDC->DrawFrameControl(&m_ArrowRect, DFC_SCROLL, DFCS_SCROLLDOWN |
((state & ODS_SELECTED) ? DFCS_PUSHED : 0) |
((state & ODS_DISABLED) ? DFCS_INACTIVE : 0));
pDC->DrawEdge(rect, EDGE_SUNKEN, BF_RECT);
// Must reduce the size of the "client" area of the button due to edge thickness.
rect.DeflateRect(Margins.cx, Margins.cy);
// Fill remaining area with colour
rect.right -= m_ArrowRect.Width();
CBrush brush( ((state & ODS_DISABLED) || m_crColourBk == CLR_DEFAULT)?
::GetSysColor(COLOR_3DFACE) : m_crColourBk);
CBrush* pOldBrush = (CBrush*) pDC->SelectObject(&brush);
pDC->SelectStockObject(NULL_PEN);
pDC->Rectangle(rect);
pDC->SelectObject(pOldBrush);
// Draw the window text (if any)
GetWindowText(m_strText);
if (m_strText.GetLength())
{
pDC->SetBkMode(TRANSPARENT);
if (state & ODS_DISABLED)
{
rect.OffsetRect(1,1);
pDC->SetTextColor(::GetSysColor(COLOR_3DHILIGHT));
pDC->DrawText(m_strText, rect, DT_CENTER|DT_SINGLELINE|DT_VCENTER);
rect.OffsetRect(-1,-1);
pDC->SetTextColor(::GetSysColor(COLOR_3DSHADOW));
pDC->DrawText(m_strText, rect, DT_CENTER|DT_SINGLELINE|DT_VCENTER);
}
else
{
pDC->SetTextColor((m_crColourText == CLR_DEFAULT)? 0 : m_crColourText);
pDC->DrawText(m_strText, rect, DT_CENTER|DT_SINGLELINE|DT_VCENTER);
}
}
// Draw focus rect
if (state & ODS_FOCUS)
{
rect.DeflateRect(1,1);
pDC->DrawFocusRect(rect);
}
}
/////////////////////////////////////////////////////////////////////////////
// CColourPicker overrides
void CColourPicker::PreSubclassWindow()
{
ModifyStyle(0, BS_OWNERDRAW); // Make it owner drawn
CButton::PreSubclassWindow();
SetWindowSize(); // resize appropriately
}
/////////////////////////////////////////////////////////////////////////////
// CColourPicker attributes
COLORREF CColourPicker::GetColour()
{
return (m_nSelectionMode == CP_MODE_TEXT)?
GetTextColour(): GetBkColour();
}
void CColourPicker::SetColour(COLORREF crColour)
{
(m_nSelectionMode == CP_MODE_TEXT)?
SetTextColour(crColour): SetBkColour(crColour);
}
void CColourPicker::SetBkColour(COLORREF crColourBk)
{
m_crColourBk = crColourBk;
if (IsWindow(m_hWnd))
RedrawWindow();
}
void CColourPicker::SetTextColour(COLORREF crColourText)
{
m_crColourText = crColourText;
if (IsWindow(m_hWnd))
RedrawWindow();
}
void CColourPicker::SetDefaultText(LPCTSTR szDefaultText)
{
m_strDefaultText = (szDefaultText)? szDefaultText : _T("");
}
void CColourPicker::SetCustomText(LPCTSTR szCustomText)
{
m_strCustomText = (szCustomText)? szCustomText : _T("");
}
/////////////////////////////////////////////////////////////////////////////
// CColourPicker implementation
void CColourPicker::SetWindowSize()
{
// Get size dimensions of edges
CSize MarginSize(::GetSystemMetrics(SM_CXEDGE), ::GetSystemMetrics(SM_CYEDGE));
// Get size of dropdown arrow
int nArrowWidth = max(::GetSystemMetrics(SM_CXHTHUMB), 5*MarginSize.cx);
int nArrowHeight = max(::GetSystemMetrics(SM_CYVTHUMB), 5*MarginSize.cy);
CSize ArrowSize(max(nArrowWidth, nArrowHeight), max(nArrowWidth, nArrowHeight));
// Get window size
CRect rect;
GetWindowRect(rect);
CWnd* pParent = GetParent();
if (pParent)
pParent->ScreenToClient(rect);
// Set window size at least as wide as 2 arrows, and as high as arrow + margins
int nWidth = max(rect.Width(), 2*ArrowSize.cx + 2*MarginSize.cx);
MoveWindow(rect.left, rect.top, nWidth, ArrowSize.cy+2*MarginSize.cy, TRUE);
// Get the new coords of this window
GetWindowRect(rect);
ScreenToClient(rect);
// Get the rect where the arrow goes, and convert to client coords.
m_ArrowRect.SetRect(rect.right - ArrowSize.cx - MarginSize.cx,
rect.top + MarginSize.cy, rect.right - MarginSize.cx,
rect.bottom - MarginSize.cy);
}