Qt第三方庫QCustomPlot——QCustomPlot解讀

Qt第三方庫QCustomPlot——QCustomPlot解讀

QCustomPlot（2） 

這個小部件類，對於QCustomPlot的全部方面都有所體現

下面閱讀它的函數：

函數組織順序爲: 基本設置---添加圖線---刪除圖線---添加額外Item---層次管理---座標軸管理----導出圖表

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    QCustomPlot (QWidget *parent=0)

void    setViewport (const QRect &rect)//視口設置，一般就是本部件所在的長寬
void    setBackground (const QPixmap &pm)//在整個視口的最底層繪製圖片，用做背景
void    setBackground (const QPixmap &pm, bool scaled, Qt::AspectRatioMode mode=Qt::KeepAspectRatioByExpanding)
void    setBackground (const QBrush &brush)
void    setBackgroundScaled (bool scaled)//設置setBackground 所繪的圖是否進行縮放以適應Viewport
void    setBackgroundScaledMode (Qt::AspectRatioMode mode)//有Qt::IgnoreAspectRatio（忽略比例，縮放至適應視口），Qt::KeepAspectRatio（保持長寬比，直到一邊最大至視口邊緣）Qt::KeepAspectRatioByExpanding（保持長寬比，縮放至充滿視口）
void    setAntialiasedElements (const QCP::AntialiasedElements &antialiasedElements)//抗鋸齒效果，對於各對象，都有默認設置，可經過本函數，改變默認不抗鋸齒的元素，使它也抗。
void    setAntialiasedElement (QCP::AntialiasedElement antialiasedElement, bool enabled=true)//更方便的開關
void    setNotAntialiasedElements (const QCP::AntialiasedElements AntialiasedElements)//設置不抗
void    setNotAntialiasedElement (QCP::AntialiasedElement notAntialiasedElement, bool enabled=true)
void    setAutoAddPlottableToLegend (bool on)//是否自動添加圖形到圖例，默認是
void    setInteraction (const QCP::Interaction &interaction, bool enabled=true)//設置交互方式，如是否可拖動或縮放軸，是否可選中軸或圖例等。
void    setInteractions (const QCP::Interactions &interactions)
void    setSelectionTolerance (int pixels)//選擇公差設置，在多少像素中能選中某個元素
void    setNoAntialiasingOnDrag (bool enabled)//拖動時是否也抗鋸齒
void    setPlottingHint (QCP::PlottingHint hint, bool enabled=true)//設置其它參數，如快速繪製線（損失質量），緩存軸的lable(提升效率)
void    setPlottingHints (const QCP::PlottingHints &hints)
void    setMultiSelectModifier (Qt::KeyboardModifier modifier)//要多選時的按鍵，默認Qt::ControlModifier，即ctrl

QRect   viewport () const//與上述大體對應
QPixmap     background () const
bool    backgroundScaled () const
Qt::AspectRatioMode     backgroundScaledMode () const
QCPLayoutGrid *     plotLayout () const
QCP::AntialiasedElements    antialiasedElements () const
QCP::AntialiasedElements    notAntialiasedElements () const
bool    autoAddPlottableToLegend () const
const QCP::Interactions     interactions () const
int     selectionTolerance () const
bool    noAntialiasingOnDrag () const
QCP::PlottingHints  plottingHints () const
Qt::KeyboardModifier    multiSelectModifier () const


QCPAbstractPlottable *  plottable (int index)//全部添加的圖線都自動加了索引，按前後順序
QCPAbstractPlottable *  plottable ()
bool    addPlottable (QCPAbstractPlottable *plottable)//添加除graph線外的其它種類型的曲線或圖
bool    removePlottable (QCPAbstractPlottable *plottable)
bool    removePlottable (int index)
int     clearPlottables ()
int     plottableCount () const
QList< QCPAbstractPlottable * >   selectedPlottables () const//返回選中的線
QCPAbstractPlottable *  plottableAt (const QPointF &pos, bool onlySelectable=false) const//返回某個點是否有圖線
bool    hasPlottable (QCPAbstractPlottable *plottable) const

QCPGraph *  addGraph (QCPAxis *keyAxis=0, QCPAxis *valueAxis=0)//爲Graph線留的特殊接口，因Graph是最經常使用的
bool    removeGraph (QCPGraph *graph)
bool    removeGraph (int index)
QCPGraph *  graph (int index) const
QCPGraph *  graph () const
int     clearGraphs ()
int     graphCount () const
QList< QCPGraph * >   selectedGraphs () const


bool    addItem (QCPAbstractItem *item)//添加一些附加item，如箭頭等
bool    removeItem (QCPAbstractItem *item)
bool    removeItem (int index)
int     clearItems ()
int     itemCount () const
QCPAbstractItem *   item (int index) const
QCPAbstractItem *   item () const
QList< QCPAbstractItem * >    selectedItems () const
QCPAbstractItem *   itemAt (const QPointF &pos, bool onlySelectable=false) const
bool    hasItem (QCPAbstractItem *item) const
QCPLayoutElement *  layoutElementAt (const QPointF &pos) const

QCPLayer *  layer (const QString &name) const//QCustomPlot分層的實現與管理
QCPLayer *  layer (int index) const
QCPLayer *  currentLayer () const
bool    setCurrentLayer (const QString &name)
bool    setCurrentLayer (QCPLayer *layer)
int     layerCount () const
bool    addLayer (const QString &name, QCPLayer *otherLayer=0, LayerInsertMode insertMode=limAbove)
bool    removeLayer (QCPLayer *layer)
bool    moveLayer (QCPLayer *layer, QCPLayer *otherLayer, LayerInsertMode insertMode=limAbove)

QCPAxisRect *   axisRect (int index=0) const
QList< QCPAxisRect * >    axisRects () const
QList< QCPAxis * >    selectedAxes () const
QList< QCPLegend * >  selectedLegends () const
int     axisRectCount () const

bool    savePdf (const QString &fileName, bool noCosmeticPen=false, int width=0, int height=0, const QString &pdfCreator="", const QString &pdfTitle="")//將圖表導出成各類格式
bool    savePng (const QString &fileName, int width=0, int height=0, double scale=1.0, int quality=-1)
bool    saveJpg (const QString &fileName, int width=0, int height=0, double scale=1.0, int quality=-1)
bool    saveBmp (const QString &fileName, int width=0, int height=0, double scale=1.0)
bool    saveRastered (const QString &fileName, int width, int height, double scale, const char *format, int quality=-1)
QPixmap     toPixmap (int width=0, int height=0, double scale=1.0)
void    toPainter (QCPPainter *painter, int width=0, int height=0)

//三個槽
Q_SLOT void     replot (QCustomPlot::RefreshPriority refreshPriority=QCustomPlot::rpHint)//從新生成圖表
Q_SLOT void     rescaleAxes (bool onlyVisiblePlottables=false)
Q_SLOT void     deselectAll ()//取消選擇