diff options
| author | Casimir666 <casimir666@users.sourceforge.net> | 2006-06-25 01:37:43 +0400 |
|---|---|---|
| committer | Casimir666 <casimir666@users.sourceforge.net> | 2006-06-25 01:37:43 +0400 |
| commit | 0868305e78da2b0742c2ce349efa041d5622ae21 (patch) | |
| tree | 663fd93132c7927910ba7c13188d6332b2e3e5b2 /src/apps/mplayerc/LineNumberEdit.cpp | |
| parent | 43c8656956a0460fc4551e3ea7a39b9f3094a3e3 (diff) | |
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@14 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/apps/mplayerc/LineNumberEdit.cpp')
| -rw-r--r-- | src/apps/mplayerc/LineNumberEdit.cpp | 971 |
1 files changed, 971 insertions, 0 deletions
diff --git a/src/apps/mplayerc/LineNumberEdit.cpp b/src/apps/mplayerc/LineNumberEdit.cpp new file mode 100644 index 000000000..563bd4a15 --- /dev/null +++ b/src/apps/mplayerc/LineNumberEdit.cpp @@ -0,0 +1,971 @@ +/* ==========================================================================
+ CLineNumberEdit
+ Author : Johan Rosengren, Abstrakt Mekanik AB
+ Date : 2004-03-09
+ Purpose : CLineNumberEdit is a CEdit-derived class that displays
+ line numbers to the left of the text.
+ Description : The class uses the edit rect to make space for the line
+ numbers. The line numbers are relized through a special
+ CStatic-derived class, CLineNumberStatic. As soon as the
+ text is updated, the CLineNumberStatic is updated as
+ well.
+ Usage : The control can be dynamically created, or created from
+ a dialog template. The formatting string for the line
+ numbers can be set by calling SetLineNumberFormat (the
+ same format string as for CString::Format). By calling
+ SetMarginForegroundColor or SetMarginBackgroundColor
+ the fore- and background colors for the line number
+ display is set.
+ ========================================================================
+ Update : Keith Bowes
+ Date : 2004-04-13
+ Purpose : 1. To allow CLineNumberEdit to properly change colour when
+ Enabled/Disabled or when system colours change.
+ Changing system colours only has a noticable effect when
+ a scheme such as Marine or Plum is chosen.
+ 2. To allow a line number delta to be applied to the first
+ line number so the index does not have to start at zero.
+ 3. To allow a max value to be specified to stop the line
+ count and to allow smarter size formatting.
+ Description : 1. Added OnEnable and OnSysColorChange to detect when
+ a colour change is required. This allows the line number
+ area and CEdit area to update colours properly.
+ Added colour ref variables to hold enabled/disabled states
+ of the background/foreground colours.
+ In an attempt to allow previous functionality to take
+ precedence, if the colours are changed explicitly, the
+ system colours are no longer queried.
+ 2. Added m_LineDelta, applied when line numbers are formatted.
+ 3. Using m_maxval when > 0 to limit the max values and when
+ formatting colomn width.
+ JRO: Added m_lineDelta as well.
+ Usage : 1. Default behaviour is to change colours to reflect CEdit.
+ manually changing the colour will cause the colours to
+ only change to the specified colours.
+ 2. SetLineNumberRange sets both min and max values.
+ 3. SetLineNumberRange sets both min and max values.
+
+ Comments : - Perhaps line values should be stored as UINT's as negative
+ values may have unexpected results.
+ - CLineNumberEdit::m_format creates a duplicate of
+ CLineNumberStatic::m_format, is this needed?
+ JRO: Even though the the two classes are thightly coupled,
+ this duplication of data makes it easier to decouple them.
+ A small matter, but code reuse is Politically Correct,
+ and as such A Desirable Feature.
+ - Added options could allow different system colours to be
+ chosen and updated as system attributes are changed.
+ - if m_maxval is exceeded in the edit box, new lines
+ are added without line numbers. This might not be the
+ desired behaviour.
+ JRO: I think this is rather nifty, actually. If I, as a
+ developer, sets the max number of lines to be numbered,
+ I also expect this to be the case :-)))
+ - It's not spelled wrong, just differently. ;0)
+ ========================================================================
+ Update : Johan Rosengren
+ Date : 2004-04-14
+ Purpose : 1. Allow deriving of CLineNumberEdit.
+ Description : 1. Made the message handlers virtual.
+ Usage : 1. Declare message handlers as virtual in derived
+ classes. Note that CLineNumberEdit is not built to
+ be derived from, however.
+ ========================================================================
+ Update : Keith Bowes
+ Date : 2004-04-22
+ Purpose : To allow processing of WM_LINESCROLL messages.
+ Description : Added OnLineScroll to handle the message.
+ Usage : Now will call UpdateTopAndBottom if the message is
+ received.
+ ========================================================================
+ Update : Johan Rosengren
+ Date : 2004-05-02
+ Purpose : Select complete line when a line-number is clicked
+ Description : Added registered user message, sent when the line-
+ number static is clicked.
+ Usage : See urm_SELECTLINE in the code.
+ ========================================================================*/
+
+#include "stdafx.h"
+#include "LineNumberEdit.h"
+
+#ifdef _DEBUG
+#define new DEBUG_NEW
+#undef THIS_FILE
+static char THIS_FILE[] = __FILE__;
+#endif
+
+// Registered message to allow selection of complete
+// lines by clicking the line number
+UINT urm_SELECTLINE = ::RegisterWindowMessage( _T("_LINE_NUMBER_EDIT_SELECTLINE_") );
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberEdit
+CLineNumberEdit::CLineNumberEdit()
+/* ============================================================
+ Function : CLineNumberEdit::CLineNumberEdit
+ Description : constructor
+
+ Return : void
+ Parameters : none
+
+ Usage :
+
+ ============================================================*/
+{
+
+ m_hWnd = NULL;
+ m_line.m_hWnd = NULL;
+ m_zero.cx = 0;
+ m_zero.cy = 0;
+ m_format = _T( "%03i" );
+ m_LineDelta = 1;
+
+ // Could default m_maxval to 99,999, but may cause problems
+ // if m_format is changed and m_maxval is not...
+ m_maxval = 998;
+
+ // Setting up so by defult the original hard-coded colour
+ // scheme is used when enabled and the system colours are
+ // used when disabled.
+ m_bUseEnabledSystemColours = FALSE;
+ m_bUseDisabledSystemColours = TRUE;
+ m_EnabledFgCol = RGB( 0, 0, 0 );
+ m_EnabledBgCol = RGB( 200, 200, 200 );
+ m_DisabledFgCol = GetSysColor( COLOR_GRAYTEXT );
+ m_DisabledBgCol = GetSysColor( COLOR_3DFACE );
+
+ SetWindowColour();
+
+}
+
+CLineNumberEdit::~CLineNumberEdit()
+/* ============================================================
+ Function : CLineNumberEdit::~CLineNumberEdit
+ Description : destructor
+
+ Return : void
+ Parameters : none
+
+ Usage :
+
+ ============================================================*/
+{
+}
+
+BEGIN_MESSAGE_MAP(CLineNumberEdit, CEdit)
+ ON_CONTROL_REFLECT(EN_CHANGE, OnChange)
+ ON_WM_VSCROLL()
+ ON_CONTROL_REFLECT(EN_VSCROLL, OnVscroll)
+ ON_MESSAGE(WM_SETFONT, OnSetFont)
+ ON_WM_SIZE()
+ ON_MESSAGE(WM_SETTEXT, OnSetText)
+ ON_WM_SYSCOLORCHANGE()
+ ON_WM_ENABLE()
+ ON_MESSAGE(EM_LINESCROLL, OnLineScroll)
+ ON_REGISTERED_MESSAGE(urm_SELECTLINE, OnSelectLine)
+END_MESSAGE_MAP()
+
+void CLineNumberEdit::PreSubclassWindow()
+/* ============================================================
+ Function : CLineNumberEdit::PreSubclassWindow
+ Description : This function is called before the control
+ is subclassed for a control on a dialog
+ template, and during creation for
+ dynamically created controls.
+
+ Return : void
+ Parameters : none
+
+ Usage : Called from MFC
+
+ ============================================================*/
+{
+
+ // Unfortunately, we can't change to ES_MULTILINE
+ // during run-time.
+ ASSERT( GetStyle() & ES_MULTILINE );
+
+ // Creating the line number control
+ SetLineNumberFormat( m_format );
+
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberEdit message handlers
+
+void CLineNumberEdit::OnSysColorChange()
+/* ============================================================
+ Function : CLineNumberEdit::OnSysColorChange
+ Description : Handles WM_SYSCOLORCHANGE. User has changed
+ the system colours, want to refresh.
+
+ Return : void
+ Parameters : void
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ CEdit::OnSysColorChange();
+
+ // update the CStatic with the new colours
+ SetWindowColour( IsWindowEnabled() );
+
+}
+
+LRESULT CLineNumberEdit::OnSetText( WPARAM wParam, LPARAM lParam )
+/* ============================================================
+ Function : CLineNumberEdit::OnSetText
+ Description : Handles WM_SETTEXT. We must update the line
+ numbers in the line number control as well.
+
+ Return : LRESULT - From Def proc
+ Parameters : WPARAM wParam - From Windows
+ LPARAM lParam - From Windows
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ // Default processing
+ LRESULT retval = DefWindowProc( WM_SETTEXT, wParam, lParam );
+ UpdateTopAndBottom();
+ return retval;
+
+}
+
+void CLineNumberEdit::OnChange()
+/* ============================================================
+ Function : CLineNumberEdit::OnChange
+ Description : Mapped to EN_CHANGE. We must handle
+ EN_CHANGE to let the line-number control
+ reflect changes to the edit box content.
+
+ Return : void
+ Parameters : none
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ UpdateTopAndBottom();
+
+}
+
+void CLineNumberEdit::OnVscroll()
+/* ============================================================
+ Function : CLineNumberEdit::OnVscroll
+ Description : Mapped to EN_VSCROLL. We update the line
+ numbers in the line number control
+
+ Return : void
+ Parameters : none
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ UpdateTopAndBottom();
+
+}
+
+void CLineNumberEdit::OnVScroll( UINT nSBCode, UINT nPos, CScrollBar* pScrollBar )
+/* ============================================================
+ Function : CLineNumberEdit::OnVScroll
+ Description : Handles WM_VSCROLL. We handle WM_VSCROLL
+ in addition to the notification EN_VSCROLL,
+ to handle scrollbar dragging as well
+
+ Return : void
+ Parameters : UINT nSBCode - From Windows
+ UINT nPos - From Windows
+ CScrollBar* pScrollBar - From Windows
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ CEdit::OnVScroll( nSBCode, nPos, pScrollBar );
+ UpdateTopAndBottom();
+
+}
+
+LRESULT CLineNumberEdit::OnLineScroll( WPARAM wParam, LPARAM lParam )
+/* ============================================================
+ Function : CLineNumberEdit::OnLineScroll
+ Description : Mapped to EM_LINESCROLL. We update the line
+ numbers in the line number control.
+
+ Return : void
+ Parameters : none
+ Usage : Called from Windows
+ ============================================================*/
+{
+
+ // Default processing
+ LRESULT retval = DefWindowProc( EM_LINESCROLL, wParam, lParam );
+ UpdateTopAndBottom();
+ return retval;
+
+}
+
+LRESULT CLineNumberEdit::OnSetFont( WPARAM wParam, LPARAM lParam )
+/* ============================================================
+ Function : CLineNumberEdit::OnSetFont
+ Description : Mapped to WM_SETFONT. We must recalculate
+ the line number control size as well.
+
+ Return : LRESULT - Always 0
+ Parameters : WPARAM wParam - From Windows
+ LPARAM lParam - From Windows
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ DefWindowProc( WM_SETFONT, wParam, lParam );
+ // We resize the line-number
+ // field
+ Prepare();
+ return 0;
+
+}
+
+void CLineNumberEdit::OnSize( UINT nType, int cx, int cy )
+/* ============================================================
+ Function : CLineNumberEdit::OnSize
+ Description : Handles WM_SIZE. Recalculates the line
+ number control size as well.
+
+ Return : void
+ Parameters : UINT nType - From Windows
+ int cx - From Windows
+ int cy - From Windows
+
+ Usage : Called from Windows
+
+ ============================================================*/
+{
+
+ CEdit::OnSize( nType, cx, cy );
+
+ // If we have the line-number
+ // control, it must be resized
+ // as well.
+ if( m_line.m_hWnd )
+ Prepare();
+
+}
+
+void CLineNumberEdit::OnEnable( BOOL bEnable )
+/* ============================================================
+ Function : CLineNumberEdit::OnEnable
+ Description : Handles WM_ENABLE. Calls to set colours.
+
+ Return : void
+ Parameters : BOOL bEnable - From Windows
+
+ Usage : Called from Windows.
+
+ ============================================================*/
+{
+
+ CEdit::OnEnable( bEnable );
+ SetWindowColour( bEnable );
+
+}
+
+LRESULT CLineNumberEdit::OnSelectLine(WPARAM wParam, LPARAM /*lParam*/ )
+/* ============================================================
+ Function : CLineNumberEdit::OnSelectLine
+ Description : Handler for the urm_SELECTLINE registered
+ message. Will select the line in wParam.
+
+ Return : LRESULT - Not used
+ Parameters : WPARAM wParam - The line to select
+ LPARAM lParam - Not used
+
+ Usage : Called from MFC. Use
+ SendMessage( urm_SELECTLINE, line ) from
+ code.
+
+ ============================================================*/
+{
+
+ // Calc start and end position of the line
+ int lineno = wParam + GetScrollPos( SB_VERT );
+ int start = LineIndex( lineno );
+ int end = LineIndex( lineno + 1 );
+ SetSel( start, end - 1 );
+ return 0;
+
+}
+
+void CLineNumberEdit::SetWindowColour( BOOL bEnable /*= TRUE*/ )
+/* ============================================================
+ Function : CLineNumberEdit::SetWindowColour
+ Description : Handles changing window colours.
+
+ Return : void
+ Parameters : BOOL bEnable - flag if set enabled/disabled
+ colours
+
+ Usage : Called to change colours in the edit box.
+
+ ============================================================*/
+{
+
+ if (m_bUseEnabledSystemColours)
+ {
+ // re-query the system colours in case they have changed.
+ m_EnabledFgCol = GetSysColor( COLOR_WINDOWTEXT );
+ m_EnabledBgCol = GetSysColor( COLOR_WINDOW );
+ }
+
+ if (m_bUseDisabledSystemColours)
+ {
+ // re-query the system colours in case they have changed.
+ m_DisabledFgCol = GetSysColor( COLOR_GRAYTEXT );
+ m_DisabledBgCol = GetSysColor( COLOR_3DFACE );
+ }
+
+ // change the colour based on bEnable
+ if (bEnable)
+ {
+ m_line.SetFgColor( m_EnabledFgCol, TRUE );
+ m_line.SetBgColor( m_EnabledBgCol, TRUE );
+ } else {
+ m_line.SetFgColor( m_DisabledFgCol, TRUE );
+ m_line.SetBgColor( m_DisabledBgCol, TRUE );
+ }
+
+}
+
+void CLineNumberEdit::UseSystemColours( BOOL bUseEnabled /*= TRUE*/, BOOL bUseDisabled /*= TRUE*/ )
+/* ============================================================
+ Function : CLineNumberEdit::UseSystemColours
+ Description : Sets the Use*SystemColours flags.
+
+ Return : void
+ Parameters : BOOL bEnabled - flag if to use enabled
+ system colours
+ BOOL bDisabled - flag if to use disabled
+ system colours
+
+ Usage : Called to change colours in the edit box
+
+ ============================================================*/
+{
+
+ m_bUseEnabledSystemColours = bUseEnabled;
+ m_bUseDisabledSystemColours = bUseDisabled;
+ BOOL bEnable = TRUE;
+ if (::IsWindow(m_hWnd))
+ bEnable = IsWindowEnabled();
+
+ SetWindowColour( bEnable );
+
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberEdit private implementation
+
+void CLineNumberEdit::Prepare()
+/* ============================================================
+ Function : CLineNumberEdit::Prepare
+ Description : Setting the edit rect for the control and
+ either create or move the line number
+ control. Also sets the top- and bottom
+ line numbers.
+
+ Return : void
+ Parameters : none
+
+ Usage : Must be called to (re)establish the edit
+ rect, must also be called as soon as the
+ control changes size.
+
+ ============================================================*/
+{
+
+ // Calc sizes
+ int width = CalcLineNumberWidth();
+ CRect rect;
+ GetClientRect( &rect );
+ CRect rectEdit( rect );
+ rect.right = width;
+ rectEdit.left = rect.right + 3;
+
+ // Setting the edit rect and
+ // creating or moving child control
+ SetRect( &rectEdit );
+ if( m_line.m_hWnd )
+ m_line.MoveWindow( 0, 0, width, rect.Height() );
+ else
+ m_line.Create(NULL,WS_CHILD | WS_VISIBLE | SS_NOTIFY, rect, this, 1 );
+
+ GetRect( &rectEdit );
+
+ // Update line number control data
+ m_line.SetTopMargin( rectEdit.top );
+ UpdateTopAndBottom();
+
+}
+
+int CLineNumberEdit::CalcLineNumberWidth()
+/* ============================================================
+ Function : CLineNumberEdit::CalcLineNumberWidth
+ Description : Calculates the desired width of the line
+ number control, using the current format
+ string and the max number of chars allowed
+ (pessimistic - assumes one character per
+ line).
+
+ Return : int - The width in pixels
+ Parameters : none
+
+ Usage : Called as soon as the format string is
+ changed.
+
+ ============================================================*/
+{
+
+ CClientDC dc( this );
+
+ // If a new font is set during runtime,
+ // we must explicitly select the font into
+ // the CClientDC to measure it.
+ CFont* font = GetFont();
+ CFont* oldFont = dc.SelectObject( font );
+
+ m_zero=dc.GetTextExtent( _T( "0" ) );
+ CString format;
+
+ // GetLimitText returns the number of bytes the edit box may contain,
+ // not the max number of lines...
+ //... which is the max number of lines, given one character per d:o :-)
+ int maxval = GetLimitText();
+ if (m_maxval > 0)
+ maxval = m_maxval + m_LineDelta;
+
+ format.Format( m_format, maxval );
+ CSize fmt = dc.GetTextExtent( format );
+ dc.SelectObject( oldFont );
+
+ // Calculate the size of the line-
+ // number field. We add a 5 pixel margin
+ // to the max size of the format string
+ return fmt.cx + 5;
+
+}
+
+void CLineNumberEdit::UpdateTopAndBottom()
+/* ============================================================
+ Function : CLineNumberEdit::UpdateTopAndBottom
+ Description : Updates the top- and bottom line number
+ for the line number control.
+
+ Return : void
+ Parameters : none
+ Usage : Should be called as soon as the contents of
+ the control is changed.
+
+ ============================================================*/
+{
+
+ CRect rect;
+ GetClientRect( &rect );
+ int maxline = GetLineCount() + m_LineDelta;
+
+ // Height for individual lines
+ int lineheight = m_zero.cy;
+
+ // Calculate the number of lines to draw
+ int topline = GetFirstVisibleLine() + m_LineDelta;
+ if( ( topline + ( rect.Height() / lineheight ) ) < maxline )
+ maxline = topline + ( rect.Height() / lineheight );
+
+ if ( m_maxval > 0 && maxline > m_maxval + m_LineDelta )
+ maxline = m_maxval + m_LineDelta;
+
+ m_line.SetTopAndBottom( topline, maxline );
+
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberEdit public implementation
+
+void CLineNumberEdit::SetMarginForegroundColor( COLORREF col, BOOL redraw, BOOL bEnabled /*= TRUE*/ )
+/* ============================================================
+ Function : CLineNumberEdit::SetMarginForegroundColor
+ Description : Sets the text color for the number
+ margin.
+
+ Return : void
+ Parameters : COLORREF col - The new text color
+ BOOL redraw - TRUE if the control
+ should be redrawn
+ (default)
+
+ Usage : Call to set a new text color for the line
+ number margin. The control will be redrawn
+ if it exists.
+
+ ============================================================*/
+{
+
+ m_line.SetFgColor( col, redraw );
+ if (bEnabled)
+ {
+ m_bUseEnabledSystemColours = FALSE;
+ m_EnabledFgCol = col;
+ } else {
+ m_bUseDisabledSystemColours = FALSE;
+ m_DisabledFgCol = col;
+ }
+
+}
+
+void CLineNumberEdit::SetMarginBackgroundColor( COLORREF col, BOOL redraw, BOOL bEnabled /*= TRUE*/ )
+/* ============================================================
+ Function : CLineNumberEdit::SetMarginBackgroundColor
+ Description : Sets the background color for the number
+ margin.
+
+ Return : void
+ Parameters : COLORREF col - The new background color
+ BOOL redraw - TRUE if the control
+ should be redrawn
+ (default)
+
+ Usage : Call to set a new background color for the
+ line number margin. The control will be
+ redrawn if it exists.
+
+ ============================================================*/
+{
+
+ m_line.SetBgColor( col, redraw );
+ if (bEnabled)
+ {
+ m_bUseEnabledSystemColours = FALSE;
+ m_EnabledBgCol = col;
+ } else {
+ m_bUseDisabledSystemColours = FALSE;
+ m_DisabledBgCol = col;
+ }
+
+}
+
+void CLineNumberEdit::SetLineNumberFormat( CString format )
+/* ============================================================
+ Function : CLineNumberEdit::SetLineNumberFormat
+ Description : Changes the way line numbers are presented
+ on screen.
+
+ Return : void
+ Parameters : CString format - The new format string
+
+ Usage : Call with a format string using the same
+ format as CString::Format. It should contain
+ one and only one numeric type.
+
+ ============================================================*/
+{
+
+ m_format = format;
+ m_line.SetLineNumberFormat( format );
+ if( m_hWnd )
+ Prepare();
+
+}
+
+void CLineNumberEdit::SetLineNumberRange( UINT nMin, UINT nMax /*= 0*/ )
+/* ============================================================
+ Function : CLineNumberEdit::SetLineNumberRange
+ Description : Changes the default min and max line numbers.
+
+ Return : void
+ Parameters : int nMin - changes the line offset
+ int nMax - changes the max line number
+
+ Usage : Call to set up the min and max line numbers.
+
+ ============================================================*/
+{
+
+ m_LineDelta = ( int ) nMin;
+ m_maxval = ( int ) nMax;
+
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberStatic
+
+CLineNumberStatic::CLineNumberStatic()
+/* ============================================================
+ Function : CLineNumberStatic::CLineNumberStatic
+ Description : constructor
+
+ Return : void
+ Parameters : none
+
+ Usage :
+
+ ============================================================*/
+{
+
+ m_bgcol = RGB( 255, 255, 248 );
+ m_fgcol = RGB( 0, 0, 0 );
+ m_format = _T( "%05i" );
+ m_topline = 0;
+ m_bottomline = 0;
+}
+
+CLineNumberStatic::~CLineNumberStatic()
+/* ============================================================
+ Function : CLineNumberStatic::~CLineNumberStatic
+ Description : destructor
+
+ Return : void
+ Parameters : none
+
+ Usage :
+
+ ============================================================*/
+{
+}
+
+BEGIN_MESSAGE_MAP(CLineNumberStatic, CStatic)
+ ON_WM_PAINT()
+ ON_WM_ERASEBKGND()
+ ON_WM_LBUTTONDOWN()
+END_MESSAGE_MAP()
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberStatic message handlers
+
+void CLineNumberStatic::OnPaint()
+/* ============================================================
+ Function : CLineNumberStatic::OnPaint
+ Description : Handler for WM_PAINT.
+
+ Return : void
+ Parameters : none
+
+ Usage : Called from Windows.
+
+ ============================================================*/
+{
+
+ CPaintDC dcPaint( this );
+
+ CRect rect;
+ GetClientRect( &rect );
+
+ // We double buffer the drawing -
+ // preparing the memory CDC
+ CDC dc;
+ dc.CreateCompatibleDC( &dcPaint );
+ int saved = dc.SaveDC();
+
+ // Create GDI and select objects
+ CBitmap bmp;
+ CPen pen;
+ bmp.CreateCompatibleBitmap( &dcPaint, rect.Width(), rect.Height() );
+ pen.CreatePen( PS_SOLID, 1, m_fgcol );
+ dc.SelectObject( &bmp );
+ dc.SelectObject( &pen );
+
+ // Painting the background
+ dc.FillSolidRect( &rect, m_bgcol );
+ dc.MoveTo( rect.right - 1, 0 );
+ dc.LineTo( rect.right - 1, rect.bottom );
+
+ // Setting other attributes
+ dc.SetTextColor( m_fgcol );
+ dc.SetBkColor( m_bgcol );
+ dc.SelectObject( GetParent()->GetFont() );
+
+ // Output the line numbers
+ if( m_bottomline )
+ {
+ int lineheight = dc.GetTextExtent( _T( "0" ) ).cy;
+ for( int t = m_topline ; t < m_bottomline ; t++ )
+ {
+ CString output;
+ output.Format( m_format, t );
+ int topposition = m_topmargin + lineheight * ( t - m_topline );
+ dc.TextOut( 2, topposition, output );
+ }
+ }
+
+ dcPaint.BitBlt( 0, 0, rect. right, rect.bottom, &dc, 0, 0, SRCCOPY );
+ dc.RestoreDC( saved );
+
+}
+
+BOOL CLineNumberStatic::OnEraseBkgnd( CDC* )
+/* ============================================================
+ Function : CLineNumberStatic::OnEraseBkgnd
+ Description : Mapped to WM_ERASEBKGND. Handled to avoid
+ flicker, as we redraw the complete control
+ in OnPaint
+
+ Return : BOOL - Always TRUE
+ Parameters : CDC* - From Windows
+
+ Usage : Called from Windows.
+
+ ============================================================*/
+{
+
+ return TRUE;
+
+}
+
+void CLineNumberStatic::OnLButtonDown( UINT nFlags, CPoint point )
+/* ============================================================
+ Function : CLineNumberStatic::OnLButtonDown
+ Description : Called when the control is clicked. Will
+ send the urm_SELECTLINE registered message
+ to the parent to select the line clicked on.
+
+ Return : void
+ Parameters : UINT nFlags - Not used
+ CPoint point - Position of cursor
+
+ Usage : Called from Windows.
+
+ ============================================================*/
+{
+
+ // Find the line clicked on
+ CClientDC dc( this );
+ dc.SelectObject( GetParent()->GetFont() );
+ int lineheight = dc.GetTextExtent( _T( "0" ) ).cy;
+ int lineno = ( int ) ( ( double ) point.y / ( double ) lineheight );
+
+ // Select this line in the edit control
+ GetParent()->SendMessage( urm_SELECTLINE, lineno );
+
+ CStatic::OnLButtonDown( nFlags, point );
+
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// CLineNumberStatic public implementation
+
+void CLineNumberStatic::SetBgColor( COLORREF col, BOOL redraw )
+/* ============================================================
+ Function : CLineNumberStatic::SetBgColor
+ Description : This function sets the panel background
+ color
+
+ Return : void
+ Parameters : COLORREF col - New background color
+ BOOL redraw - TRUE if the control
+ should be redrawn
+ (default)
+
+ Usage : Called from the parent.
+
+ ============================================================*/
+{
+
+ m_bgcol = col;
+ if( m_hWnd && redraw )
+ RedrawWindow();
+
+}
+
+void CLineNumberStatic::SetFgColor( COLORREF col, BOOL redraw )
+/* ============================================================
+ Function : CLineNumberStatic::SetFgColor
+ Description : This function sets the panel foreground
+ color
+
+ Return : void
+ Parameters : COLORREF col - New text color
+ BOOL redraw - TRUE if the control
+ should be redrawn
+ (default)
+
+ Usage : Called from the parent.
+
+ ============================================================*/
+{
+
+ m_fgcol = col;
+ if( m_hWnd && redraw )
+ RedrawWindow();
+
+}
+
+void CLineNumberStatic::SetTopAndBottom( int topline, int bottomline )
+/* ============================================================
+ Function : CLineNumberStatic::SetTopAndBottom
+ Description : Sets the top- and bottom line and redraw
+ the control (if it exists)
+
+ Return : void
+ Parameters : int topline - The top line number
+ int bottomline - The bottom line number
+
+ Usage : Called when the top and bottom line is
+ changed in the parent.
+
+ ============================================================*/
+{
+
+ m_topline = topline;
+ m_bottomline = bottomline;
+ if( m_hWnd )
+ RedrawWindow();
+
+}
+
+void CLineNumberStatic::SetTopMargin( int topmargin )
+/* ============================================================
+ Function : CLineNumberStatic::SetTopMargin
+ Description : Sets the top margin for painting.
+
+ Return : void
+ Parameters : int topmargin - The top margin to set
+
+ Usage : Will be called with the value of GetRect
+ from the parent.
+
+ ============================================================*/
+{
+
+ m_topmargin = topmargin;
+
+}
+
+void CLineNumberStatic::SetLineNumberFormat( CString format )
+/* ============================================================
+ Function : CLineNumberStatic::SetLineNumberFormat
+ Description : Sets the format string of the control
+
+ Return : void
+ Parameters : CString format - Format string to use
+
+ Usage : Called from the parent when the format
+ string is changed.
+
+ ============================================================*/
+{
+
+ m_format = format;
+ if( m_hWnd )
+ RedrawWindow();
+
+}
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