ColourPicker.cpp
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上传日期:2007-01-08
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文件大小:10k
- // 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);
- }