358 lines
8.9 KiB
C++
358 lines
8.9 KiB
C++
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/*
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*
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* ChartLegend.cpp
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*
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* Written by C<EFBFBD>dric Moonen (cedric_moonen@hotmail.com)
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*
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*
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*
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* This code may be used for any non-commercial and commercial purposes in a compiled form.
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* The code may be redistributed as long as it remains unmodified and providing that the
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* author name and this disclaimer remain intact. The sources can be modified WITH the author
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* consent only.
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*
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* This code is provided without any garanties. I cannot be held responsible for the damage or
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* the loss of time it causes. Use it at your own risks
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*
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* An e-mail to notify me that you are using this code is appreciated also.
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*
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* History:
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* - 02/03/2008: Legend can now be docked on any side or can be floating.
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* - 02/03/2008: Added support for transparent legend.
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* - 24/03/2008: Bug fix for invisible series.
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* - 28/03/2008: Support for horizontal legend.
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* - 28/03/2008: Bitmap size is now the same for all series.
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*
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*/
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#include "stdafx.h"
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#include "ChartLegend.h"
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#include "ChartSerie.h"
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#include "ChartCtrl.h"
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#ifdef _DEBUG
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#undef THIS_FILE
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static char THIS_FILE[]=__FILE__;
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#define new DEBUG_NEW
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#endif
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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CChartLegend::CChartLegend(CChartCtrl* pParent)
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{
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m_pParentCtrl = pParent;
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m_BackColor = RGB(255,255,255);
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m_iFontSize = 100;
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m_strFontName = _T("Times New Roman");
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m_bIsVisible = false;
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m_bDocked = true;
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m_DockSide = dsDockRight;
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m_iLeftPos = m_iTopPos = 0;
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m_bIsTransparent = false;
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m_bIsHorizontal = false;
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m_bShadow = true;
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m_iShadowDepth = 3;
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m_BitmapSize.cx = 16;
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m_BitmapSize.cy = 16;
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}
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CChartLegend::~CChartLegend()
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{
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}
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void CChartLegend::SetVisible(bool bVisible)
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{
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m_bIsVisible = bVisible;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::SetBackColor(COLORREF NewColor)
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{
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m_BackColor = NewColor;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::SetShadowColor(COLORREF NewColor)
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{
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m_ShadowColor = NewColor;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::EnableShadow(bool bEnable)
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{
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m_bShadow = bEnable;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::SetShadowDepth(int Depth)
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{
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m_iShadowDepth = Depth;
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m_pParentCtrl->RefreshCtrl();
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}
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BOOL CChartLegend::IsPointInside(const CPoint& screenPoint) const
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{
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return m_LegendRect.PtInRect(screenPoint);
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}
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void CChartLegend::SetFont(int iPointSize, const TChartString& strFaceName)
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{
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m_iFontSize = iPointSize;
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m_strFontName = strFaceName;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::SetTransparent(bool bTransparent)
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{
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m_bIsTransparent = bTransparent;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::SetHorizontalMode(bool bHorizontal)
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{
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m_bIsHorizontal = bHorizontal;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::DockLegend(DockSide dsSide)
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{
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m_bDocked = true;
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m_DockSide = dsSide;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::UndockLegend(int iLeftPos, int iTopPos)
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{
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m_bDocked = false;
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m_iLeftPos = iLeftPos;
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m_iTopPos = iTopPos;
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m_pParentCtrl->RefreshCtrl();
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}
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void CChartLegend::ClipArea(CRect& rcControl, CDC* pDC)
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{
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UpdatePosition(pDC,rcControl);
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if (m_LegendRect.IsRectEmpty())
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return;
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if (m_bDocked)
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{
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switch (m_DockSide)
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{
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case dsDockRight:
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rcControl.right = m_LegendRect.left + 2;
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break;
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case dsDockLeft:
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rcControl.left = m_LegendRect.right - 2;
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break;
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case dsDockTop:
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rcControl.top = m_LegendRect.bottom + 2;
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break;
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case dsDockBottom:
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rcControl.bottom = m_LegendRect.top - 2;
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break;
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}
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}
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}
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void CChartLegend::UpdatePosition(CDC* pDC, const CRect& rcControl)
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{
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CRect NewPosition;
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NewPosition.SetRectEmpty();
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if (!m_bIsVisible)
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{
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m_LegendRect = NewPosition;
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return;
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}
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CFont* pOldFont;
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CFont NewFont;
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NewFont.CreatePointFont(m_iFontSize,m_strFontName.c_str(),pDC);
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pOldFont = pDC->SelectObject(&NewFont);
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int Height = 0;
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int Width = 0;
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int MaxText = 0;
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CSize TextSize;
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m_pParentCtrl->GoToFirstSerie();
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int Drawn = 0;
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while (CChartSerie* pSerie=m_pParentCtrl->GetNextSerie())
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{
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if ( (pSerie->GetName() == _T("")) || !pSerie->IsVisible() )
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continue;
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Drawn++;
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TextSize = pDC->GetTextExtent(pSerie->GetName().c_str());
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if (!m_bIsHorizontal)
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{
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if (TextSize.cy>m_BitmapSize.cy)
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Height += TextSize.cy + 2;
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else
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Height += m_BitmapSize.cy + 2;
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if (TextSize.cx > MaxText)
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MaxText = TextSize.cx;
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}
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else
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{
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Width += TextSize.cx + 4 + m_BitmapSize.cx + 10;
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if (TextSize.cy > MaxText)
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MaxText = TextSize.cy;
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}
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}
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pDC->SelectObject(pOldFont);
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DeleteObject(NewFont);
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if (!Drawn)
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{
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m_LegendRect = NewPosition;
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return;
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}
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if (!m_bIsHorizontal)
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{
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Width += MaxText + m_BitmapSize.cx + 12;
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Height += 4 + 4 - 2; // Top and bottom margins. -2 because space counted once too much
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}
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else
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{
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Width += 2 + 2 - 10;
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Height = 4 + max(m_BitmapSize.cy,MaxText) + 4;
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}
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if (!m_bDocked)
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{
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NewPosition.top = m_iTopPos;
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NewPosition.left = m_iLeftPos;
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NewPosition.bottom = m_iTopPos + Height + 2;
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NewPosition.right = m_iLeftPos + Width;
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}
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else
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{
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switch (m_DockSide)
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{
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case dsDockRight:
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NewPosition.top = ((rcControl.bottom-rcControl.top)/2) - ((Height + 2)/2);
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NewPosition.left = rcControl.right - (Width + 6);
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NewPosition.bottom = NewPosition.top + Height;
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NewPosition.right = NewPosition.left + Width;
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break;
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case dsDockLeft:
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NewPosition.top = ((rcControl.bottom-rcControl.top)/2) - ((Height + 2)/2);
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NewPosition.left = rcControl.left + 3;
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NewPosition.bottom = NewPosition.top + Height;
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NewPosition.right = NewPosition.left + Width;
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break;
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case dsDockTop:
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NewPosition.top = rcControl.top + 3; //((rcControl.bottom-rcControl.top)/2) - ((Height + 2)/2);
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NewPosition.left = ((rcControl.right-rcControl.left)/2) - (Width/2); // rcControl.left + 3;
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NewPosition.bottom = NewPosition.top + Height;
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NewPosition.right = NewPosition.left + Width;
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break;
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case dsDockBottom:
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NewPosition.top = rcControl.bottom - (Height + 2); //((rcControl.bottom-rcControl.top)/2) - ((Height + 2)/2);
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NewPosition.left = ((rcControl.right-rcControl.left)/2) - (Width/2); // rcControl.left + 3;
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NewPosition.bottom = NewPosition.top + Height;
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NewPosition.right = NewPosition.left + Width;
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break;
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}
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}
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m_LegendRect = NewPosition;
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}
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void CChartLegend::Draw(CDC *pDC)
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{
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if (!pDC->GetSafeHdc())
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return;
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if (!m_bIsVisible)
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return;
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if (m_LegendRect.IsRectEmpty())
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return;
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CPen SolidPen(PS_SOLID,0,RGB(0,0,0));
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CPen* pOldPen;
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CFont* pOldFont;
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CFont NewFont;
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NewFont.CreatePointFont(m_iFontSize,m_strFontName.c_str(),pDC);
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// Draw the shadow
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if (m_bShadow)
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{
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CRect ShadowRect = m_LegendRect;
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ShadowRect.OffsetRect(m_iShadowDepth,m_iShadowDepth);
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CBrush BrushShadow;
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BrushShadow.CreateSolidBrush(m_ShadowColor) ;
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pDC->FillRect(ShadowRect,&BrushShadow);
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}
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if (!m_bIsTransparent)
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{
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//Fill back color
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CBrush BrushBack;
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BrushBack.CreateSolidBrush(m_BackColor) ;
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pDC->FillRect(m_LegendRect,&BrushBack);
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}
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pOldFont = pDC->SelectObject(&NewFont);
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pOldPen = pDC->SelectObject(&SolidPen);
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//Draw rectangle:
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pDC->MoveTo(m_LegendRect.left,m_LegendRect.top);
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pDC->LineTo(m_LegendRect.right,m_LegendRect.top);
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pDC->LineTo(m_LegendRect.right,m_LegendRect.bottom);
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pDC->LineTo(m_LegendRect.left,m_LegendRect.bottom);
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pDC->LineTo(m_LegendRect.left,m_LegendRect.top);
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int iPrevMode = pDC->SetBkMode(TRANSPARENT);
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CRect rectBitmap(m_LegendRect.left+2,m_LegendRect.top+5,
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m_LegendRect.left+2+m_BitmapSize.cx,
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m_LegendRect.top+6+m_BitmapSize.cy);
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m_pParentCtrl->GoToFirstSerie();
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while (CChartSerie* pSerie=m_pParentCtrl->GetNextSerie())
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{
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if ( (pSerie->GetName() == _T("")) || !pSerie->IsVisible() )
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continue;
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int MaxHeight = 0;
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CSize TextSize = pDC->GetTextExtent(pSerie->GetName().c_str());
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if (TextSize.cy > m_BitmapSize.cy)
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{
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pDC->ExtTextOut(rectBitmap.right+4,rectBitmap.top,ETO_CLIPPED,NULL,pSerie->GetName().c_str(),NULL);
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CRect rectTemp(rectBitmap);
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int YOffset = TextSize.cy/2 - rectBitmap.Height()/2;
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rectTemp.OffsetRect(0,YOffset);
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pSerie->DrawLegend(pDC,rectTemp);
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MaxHeight = TextSize.cy;
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}
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else
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{
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int YOffset = rectBitmap.CenterPoint().y - TextSize.cy/2;
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pDC->ExtTextOut(rectBitmap.right+4,YOffset,ETO_CLIPPED,NULL,pSerie->GetName().c_str(),NULL);
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MaxHeight = m_BitmapSize.cy;
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pSerie->DrawLegend(pDC,rectBitmap);
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}
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if (!m_bIsHorizontal)
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rectBitmap.OffsetRect(0,MaxHeight+2);
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else
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rectBitmap.OffsetRect(m_BitmapSize.cx+4+TextSize.cx+10,0);
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}
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pDC->SetBkMode(iPrevMode);
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pDC->SelectObject(pOldFont);
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DeleteObject(NewFont);
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pDC->SelectObject(pOldPen);
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DeleteObject(SolidPen);
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}
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