QtView Class Reference

#include <QtView.h>

Inheritance diagram for QtView:

[legend]Collaboration diagram for QtView:

[legend]List of all members.

Detailed Description

The class of derived from ViewBase and QCanvasRectangle for drawing on a QCanvas.

It is derived from QCanvasRectangle in order to get a position and size on the canvas. The view thus becomes a QCanvasItem. The inherited active state is used to lock the size and position on the canvas. The inherited selected state is used to highlight the selected item. It also derives from QtViewImp which contains most of the drawing code.

Author:: Paul F. Kunz <Paul_Kunz@slac.stanford.edu>
Sanket Biren Malde <sanket@stanford.edu>

Definition at line 41 of file QtView.h.

Public Member Functions

chunks () const

virtual const QFont & defaultFont ()

virtual void draw (QPainter &)

Re-Implements the inherited function from QCanvasPoygonalItem.

virtual void drawColorLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const std::vector< Color > &colors, float size)

Draws multiple line segments, each with a different color - that is, a line between x0,y0 and x1,y1, with color[0] =color[1] another between x2,y2 and x3,y3 with color[2]=color[3] and so on.

virtual void drawLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const Color &color, float size)

Draws multiple line segments - that is, a line between x0,y0 and x1,y2, another between x2,y2 and x3,y3 and so on.

virtual void drawMag (float x, float y, int mag, float fontsize, QFont &)

virtual void drawMag (float x, float y, int mag, float fontsize)

Draws the exponent on the axis label.

virtual void drawPoints (const std::vector< double > &x, const std::vector< double > &y, const std::vector< Color > &colors, hippodraw::Symbol::Type type, float sym_size)

virtual void drawPoints (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Symbol::Type type, float sym_size)

virtual void drawPolyLine (const std::vector< double > &xpoints, const std::vector< double > &ypoints, hippodraw::Line::Style style, const Color &color, float size)

Draws a polyline.

virtual void drawSelf ()

Draws itself.

virtual void drawShape (QPainter &)

Overrides pure virtual function of QCanvasPolygonalItem.

virtual void drawSquare (double x1, double y1, double x2, double y2, int red, int green, int blue)

Draws a colored square.

virtual void drawText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize, const FontBase *font)

Draws a text string at a point in the view's coordinate system.

virtual void drawText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize)

virtual void drawUserText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp)

Draws a text string at a point in the data coordinate system.

virtual void drawViewLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const Color &color, float size)

Draws multiple line segments.

virtual void drawViewLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, bool color, float size)

Draws multiple line segments.

virtual void drawViewSquare (float x1, float y1, float x2, float y2, int red, int green, int blue)

Draws a colored square in view space.

virtual void endPlot ()

Finalizes the plot view by unlocking the QApplication.

virtual void fillPickedPoint (double x, double y, std::vector< double > &picked) const

Fills the picked point vector.

virtual double getAspectRatio () const

Get the aspect ratio.

virtual HippoRectangle getDrawRect () const

Overrides virtual function of ViewBase.

virtual HippoRectangle getMarginRect () const

Returns the Rectangle within which points representations are draw.

PlotterBase * getPlotter ()

Returns the plotter used by this view.

PlotterBase * getPlotter () const

Returns the plotter used by this view.

const Range & getRange (hippodraw::Axes::Type axis) const

Returns the range of the data space on specified axis.

const HippoRectangle & getUserRect () const

Is called by the AxisRepBase object (or one of its derived objects), and returns the rectangle where the drawing is made.

height () const

virtual void initPlot (double transform_aspect_ratio)

Initializes a view before drawing.

QtView (const QtView &)

The copy constructor.

QtView (PlotterBase *plotter)

The constructor.

rect () const

rtti () const

void setCrossX (double val)

Set the crossX value.

void setCrossY (double val)

Set the crossY value.

virtual void setDefaultFont (const QFont &font)

virtual void setDrawRect (float x, float y, float width, float height)

Sets the drawing rectangle in the paint device space.

void setDrawRect (const QRect &rect)

Sets the drawing rectangle in the paint device space.

void setInspector (QObject *)

Sets the receiver of update messages.

virtual void setPageWidth (int upage_w)

Set the page width.

virtual void setPlotter (PlotterBase *plotter)

Sets the PlotterBase object to plotter.

virtual void setShowCrossHairs (bool flag)

Sets display status of cross-hairs.

setSize (int width, int height)

size () const

int toView (double x) const

Converts the view space coordinate x expressed as a double to one expressed as an int.

int toViewX (double datX) const

Converts the data space coordinate X to the view space coordinate X.

int toViewY (double datY) const

Converts the data space coordinate Y to the view space coordinate Y.

virtual void update (const Observable *)

Responds to Obvervable update message.

float userToDrawColor (double c) const

Converts a coordinate in user space to drawing space along the color (X) axis.

float userToDrawX (double x) const

Converts a coordinate in user space to drawing space along the X axis.

float userToDrawY (double x) const

Converts a coordinate in user space to drawing space along the Y axis.

width () const

virtual void willDelete (const Observable *)

Notifies this Observer object that one of its Observable objects is about to be deleted.

virtual ~QtView ()

The required virtual destructor.

Protected Member Functions

virtual void draw_Text (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize, QFont &font)

Protected Attributes

QFont m_font_default

QObject * m_inspector

The receiver of update messages.

QPainter * m_painter

The current Qt QPainter object.

PlotterBase * m_plotter

The plotter object used by this view.

Private Member Functions

void drawMethod (const std::vector< double > &x, const std::vector< double > &y, int opt1, int opt2)

Draws in the view using the specified method.

void drawViewMethod (const std::vector< double > &x, const std::vector< double > &y, int opt1, int opt2)

Draws in the view using the specified method.

void drawWithPixmap (QPainter &painter)

Does the drawing with QPixmap cache instead of directly to paint device.

void ensureOffScrSize (int osw, int osh)

Used by the double buffering done in method draw.

int toCanvasX (double dx) const

Converts coordinate from view space to canvas space.

int toCanvasY (double dy) const

Converts coordinate from view space to canvas space.

void transformAndFill (QPointArray &array, const std::vector< double > &x, const std::vector< double > &y, int(QtView::*xfunc)(double) const, int(QtView::*yfunc)(double) const )

Fills the array with QPoint objects whose coordinates are in the QPaintDevice space from the vectors x and y whose coordinates are in the data space.

Private Attributes

bool m_crosshairs

A flag indicating if cross-hairs should be drawn.

bool m_filled

A flag indicating if the buffer pixmap has been filled.

bool m_is_drawing

A flag set true when drawing has stared.

QPixmap m_pixmap

A QPixmap used for buffer the plot.

int m_upage_w

Page width.

Constructor & Destructor Documentation

QtView::QtView ( PlotterBase * plotter )

The constructor.

Parameters:

plotter The plotter of the class derived from PlotterBase to be used in a drawing.

Definition at line 29 of file QtView.cxx.
References ViewBase::m_plotter.

QtView::QtView ( const QtView & )

The copy constructor.

QtView::~QtView ( ) [virtual]

The required virtual destructor.

Definition at line 46 of file QtView.cxx.
References ViewBase::m_plotter.

Member Function Documentation

const QFont & QtViewImp::defaultFont ( ) [virtual, inherited]

Definition at line 913 of file QtViewImp.cxx.
References QtViewImp::m_font_default.

void QtView::draw ( QPainter & ) [virtual]

Re-Implements the inherited function from QCanvasPoygonalItem.
First calls base class to draw the contents. If selected, then also draws the border and sends update message to m_inspector.
Definition at line 111 of file QtView.cxx.
References QPainter::device(), DrawBorder::draw(), ViewBase::drawSelf(), drawWithPixmap(), DrawBorder::instance(), m_crosshairs, m_is_drawing, QtViewImp::m_painter, ViewBase::m_plotter, QPainter::setPen(), and DrawBorder::setView().
Referenced by drawShape(), and initPlot().

void QtViewImp::draw_Text ( const std::string & s,

float x,

float y,

float fontsize,

float angle,

char xp,

char yp,

bool resize,

QFont & font

) [protected, virtual, inherited]

Definition at line 593 of file QtViewImp.cxx.
References QPainter::boundingRect(), QFontMetrics::boundingRect(), QPainter::drawText(), ViewBase::getDrawRect(), HippoRectangle::getHeight(), HippoRectangle::getWidth(), HippoRectangle::getX(), HippoRectangle::getY(), QRect::height(), QtViewImp::m_painter, QRect::moveBy(), QPainter::restore(), QPainter::rotate(), QPainter::save(), ViewBase::setDrawRect(), QPainter::setFont(), QRect::setHeight(), QFont::setPixelSize(), QFont::setPointSize(), QRect::setWidth(), QPainter::translate(), and QRect::width().
Referenced by QtViewImp::drawText(), and QtViewImp::drawUserText().

void QtViewImp::drawColorLines ( const std::vector< double > & x,

const std::vector< double > & y,

hippodraw::Line::Style style,

const std::vector< Color > & colors,

float size

) [virtual, inherited]

Draws multiple line segments, each with a different color - that is, a line between x0,y0 and x1,y1, with color[0] =color[1] another between x2,y2 and x3,y3 with color[2]=color[3] and so on.
x pairs of coordinates in user space on the X axis for the beginning and the end of the line segment.
y pairs of coordinates in user space on the Y axis for the beginning and the end of the line segment.
style the line style.
color The RGB values for the color of the line.
size The thickness of the line.

Bug:
Could call drawPolyLine for each contour with same color.

Implements ViewBase.
Definition at line 509 of file QtViewImp.cxx.
References QPainter::drawLine(), Color::getBlue(), Color::getGreen(), Color::getRed(), QtViewImp::m_painter, QPainter::restore(), QtViewImp::s_line_style, QPainter::save(), QPainter::setPen(), QPen::setStyle(), QtViewImp::toViewX(), and QtViewImp::toViewY().

void QtViewImp::drawLines ( const std::vector< double > & x,

const std::vector< double > & y,

hippodraw::Line::Style style,

const Color & color,

float size

) [virtual, inherited]

Draws multiple line segments - that is, a line between x0,y0 and x1,y2, another between x2,y2 and x3,y3 and so on.
x pairs of coordinates in user space on the X axis for the beginning and the end of the line segment. y pairs of coordinates in user space on the Y axis for the beginning and the end of the line segment. style the line style. color The color size The thickness of the line.
Implements ViewBase.
Definition at line 482 of file QtViewImp.cxx.
References QtViewImp::createPen(), QPainter::drawLineSegments(), QtViewImp::m_painter, QPainter::restore(), QPainter::save(), QPainter::setPen(), QtViewImp::toViewX(), QtViewImp::toViewY(), and QtViewImp::transformAndFill().

void QtViewImp::drawMag ( float x,

float y,

int mag,

float fontsize,

QFont &

) [virtual, inherited]

Definition at line 840 of file QtViewImp.cxx.
References QString::arg(), QPainter::drawText(), QString::length(), QtViewImp::m_painter, QPainter::restore(), QPainter::save(), QPainter::setFont(), QFont::setPointSize(), and QPainter::translate().

void QtViewImp::drawMag ( float x,

float y,

int mag,

float fontsize

) [virtual, inherited]

Draws the exponent on the axis label.
The arguments stand for the starting position of the writing ( x, y ), for the value of the magnitude ( mag ), and for the font ( fontsize ).

Bug:
@@ This method should not exist.
The x, y coordinates of the position of the magnitude should be calculated in the AxisRepBase class and that class should use drawText.
Implements ViewBase.
Definition at line 833 of file QtViewImp.cxx.
References QtViewImp::m_font_default.

void QtView::drawMethod ( const std::vector< double > & x,

const std::vector< double > & y,

int opt1,

int opt2

) [private]

Draws in the view using the specified method.
The coordinates are in the user space.
Reimplemented from QtViewImp.
Definition at line 267 of file QtView.cxx.
References QPainter::drawPolyline(), QtViewImp::m_painter, QCanvasRectangle::size(), toViewX(), toViewY(), and transformAndFill().

void QtViewImp::drawPoints ( const std::vector< double > & x,

const std::vector< double > & y,

const std::vector< Color > & colors,

hippodraw::Symbol::Type type,

float sym_size

) [virtual, inherited]

Todo:
This method has a lot of duplicated code from the one with the same name but only one color.
One should remove the duplication.

Todo:
The draw triangle methods have duplicated code which could be removed.

Implements ViewBase.
Definition at line 317 of file QtViewImp.cxx.
References hippodraw::Symbol::CIRCLE, QPainter::drawEllipse(), QPainter::drawPie(), QPainter::drawPolygon(), hippodraw::Symbol::FILLED_CIRCLE, hippodraw::Symbol::FILLED_TRIANGLE, QPainter::fillRect(), Color::getBlue(), Color::getGreen(), Color::getRed(), QtViewImp::m_painter, hippodraw::Symbol::PLUS, QPainter::restore(), QPainter::save(), QPainter::setBrush(), QPainter::setPen(), QPointArray::setPoint(), hippodraw::Symbol::SOLIDSQUARE, hippodraw::Symbol::SQUARE, hippodraw::Symbol::TIMES, QtViewImp::toViewX(), QtViewImp::toViewY(), and hippodraw::Symbol::TRIANGLE.

void QtViewImp::drawPoints ( const std::vector< double > & x,

const std::vector< double > & y,

hippodraw::Symbol::Type type,

float sym_size

) [virtual, inherited]

Todo:
Determine if this member function is no longer needed.

Definition at line 300 of file QtViewImp.cxx.

void QtViewImp::drawPolyLine ( const std::vector< double > & xpoints,

const std::vector< double > & ypoints,

hippodraw::Line::Style style,

const Color & color,

float size

) [virtual, inherited]

Draws a polyline.
xpoints points along the X axis. ypoints points along the Y axis. style the line style. color The color. size The thickness of the line.
Implements ViewBase.
Definition at line 463 of file QtViewImp.cxx.
References QtViewImp::createPen(), QtViewImp::drawMethod(), QtViewImp::m_painter, QPainter::restore(), QPainter::save(), and QPainter::setPen().

void ViewBase::drawSelf ( ) [virtual, inherited]

Draws itself.

Definition at line 60 of file ViewBase.cxx.
References PlotterBase::drawIn(), and ViewBase::m_plotter.
Referenced by QtViewWidget::draw(), draw(), drawWithPixmap(), OpenGLWindow::paint(), and QtViewWidget::paintEvent().

void QtView::drawShape ( QPainter & painter ) [virtual]

Overrides pure virtual function of QCanvasPolygonalItem.

Todo:
This method could be removed.

Reimplemented from QCanvasRectangle.
Definition at line 141 of file QtView.cxx.
References draw().

void QtViewImp::drawSquare ( double x1,

double y1,

double x2,

double y2,

int red,

int green,

int blue

) [virtual, inherited]

Draws a colored square.
Used for shading on the cuts and the gray plot.
Implements ViewBase.
Definition at line 865 of file QtViewImp.cxx.
References QPainter::fillRect(), QtViewImp::m_painter, QtViewImp::toViewX(), and QtViewImp::toViewY().

void QtViewImp::drawText ( const std::string & s,

float x,

float y,

float fontsize,

float angle,

char xp,

char yp,

bool resize,

const FontBase * font

) [virtual, inherited]

Draws a text string at a point in the view's coordinate system.

Parameters:

s The string to be drawn.

x The x coordinate in the view's coordinate system.

y The y coordinate in the view's coordinate system.

fontsize The font size. If zero, then taken from the font object.

angle The angle to draw. 90 degrees is vertical with the beginning of the text towards the bottom.

xp The horizontal alignment with respect to the coordinate. 'r' means the coordinate is on the right side of the text, 'c' means centered, and 'l' for the left side.

yp The vertical alignment with respect to the coordinate. 't' means toward the top, 'c' means centered, and 'b' means bottom.

resize If true, the bounding rectangle of the view should be resized to fit the text string.

font If not a null pointer, then the font object to be used, otherwise the default font will be used.

Implements ViewBase.
Definition at line 791 of file QtViewImp.cxx.
References QtViewImp::draw_Text(), ViewBase::getDrawRect(), HippoRectangle::getX(), HippoRectangle::getY(), and QtViewImp::m_font_default.

void QtViewImp::drawText ( const std::string & s,

float xx,

float yy,

float fontsize,

float angle,

char xp,

char yp,

bool resize

) [virtual, inherited]

Note:
This method is only here to avoid introducing FontBase to SIP based Python extension module.

Definition at line 781 of file QtViewImp.cxx.

void QtViewImp::drawUserText ( const std::string & s,

float x,

float y,

float fontsize,

float angle,

char xp,

char yp

) [virtual, inherited]

Draws a text string at a point in the data coordinate system.

See also:
drawText

Bug:
Is this function used somewhere?

Implements ViewBase.
Definition at line 819 of file QtViewImp.cxx.
References QtViewImp::draw_Text(), ViewBase::getDrawRect(), HippoRectangle::getX(), HippoRectangle::getY(), QtViewImp::m_font_default, QtViewImp::userToDrawX(), and QtViewImp::userToDrawY().

void QtViewImp::drawViewLines ( const std::vector< double > & x,

const std::vector< double > & y,

hippodraw::Line::Style style,

const Color & color,

float size

) [virtual, inherited]

Draws multiple line segments.
x pairs of coordinates in view space on the X axis for the beginning and the end of the line segment. y pairs of coordinates in view space on the Y axis for the beginning and the end of the line segment. style the line style. color The color size The thickness of the line.
Implements ViewBase.
Definition at line 566 of file QtViewImp.cxx.
References QtViewImp::createPen(), QPainter::drawLineSegments(), QtViewImp::m_painter, QPainter::restore(), QPainter::save(), QPainter::setPen(), QtViewImp::toCanvasX(), QtViewImp::toCanvasY(), and QtViewImp::transformAndFill().

void QtViewImp::drawViewLines ( const std::vector< double > & x,

const std::vector< double > & y,

hippodraw::Line::Style style,

bool color,

float size

) [virtual, inherited]

Draws multiple line segments.
x pairs of coordinates in view space on the X axis for the beginning and the end of the line segment. y pairs of coordinates in view space on the Y axis for the beginning and the end of the line segment. style the line style. color if true, use the display's point color; otherwise, use the default color. size The thickness of the line.
Implements ViewBase.
Definition at line 544 of file QtViewImp.cxx.
References QtViewImp::drawViewMethod(), QtViewImp::m_painter, QPainter::pen(), QPainter::restore(), QtViewImp::s_line_style, QPainter::save(), QPainter::setPen(), and QPen::setStyle().

void QtView::drawViewMethod ( const std::vector< double > & x,

const std::vector< double > & y,

int opt1,

int opt2

) [private]

Draws in the view using the specified method.
The coordinates are in the view space.

Todo:
We may have function like this that takes pointer to member function of QPainter as first argument.

Reimplemented from QtViewImp.
Definition at line 250 of file QtView.cxx.
References QPainter::drawLineSegments(), QtViewImp::m_painter, QCanvasRectangle::size(), toCanvasX(), toCanvasY(), and transformAndFill().

void QtViewImp::drawViewSquare ( float x1,

float y1,

float x2,

float y2,

int red,

int green,

int blue

) [virtual, inherited]

Draws a colored square in view space.
Used for shading on the cuts and the gray plot.
Implements ViewBase.
Definition at line 880 of file QtViewImp.cxx.
References QPainter::fillRect(), QtViewImp::m_painter, QtViewImp::toCanvasX(), and QtViewImp::toCanvasY().

void QtView::drawWithPixmap ( QPainter & painter ) [private]

Does the drawing with QPixmap cache instead of directly to paint device.

Attention:
This method should not be used when drawing to the printer.

Definition at line 55 of file QtView.cxx.
References QPainter::begin(), QPainter::drawPixmap(), ViewBase::drawSelf(), QPainter::end(), ensureOffScrSize(), QPixmap::fill(), ViewBase::getAspectRatio(), getDrawRect(), HippoRectangle::getHeight(), HippoRectangle::getWidth(), HippoRectangle::getX(), HippoRectangle::getY(), QCanvasRectangle::height(), m_filled, QtViewImp::m_painter, m_pixmap, QCanvasRectangle::rect(), setDrawRect(), QPainter::translate(), and QCanvasRectangle::width().
Referenced by draw().

void QtView::endPlot ( ) [virtual]

Finalizes the plot view by unlocking the QApplication.

Reimplemented from QtViewImp.
Definition at line 198 of file QtView.cxx.

void QtView::ensureOffScrSize ( int osw,

int osh

) [private]

Used by the double buffering done in method draw.

Todo:
It still does a fair amount of flickering, need to look at this further.

Definition at line 284 of file QtView.cxx.
References QPixmap::height(), m_pixmap, QPixmap::resize(), and QPixmap::width().
Referenced by drawWithPixmap().

void QtView::fillPickedPoint ( double x,

double y,

std::vector< double > & picked

) const [virtual]

Fills the picked point vector.
Converts the view coordinates x and y to data coordinates. The results are put in the vector picked.
Implements QtViewImp.
Definition at line 215 of file QtView.cxx.
References ViewBase::m_plotter.

double ViewBase::getAspectRatio ( ) const [virtual, inherited]

Get the aspect ratio.

Definition at line 85 of file ViewBase.cxx.
References ViewBase::m_plotter.
Referenced by CanvasView::contentsMouseMoveEvent(), and drawWithPixmap().

HippoRectangle QtView::getDrawRect ( ) const [virtual]

Overrides virtual function of ViewBase.

Implements ViewBase.
Definition at line 146 of file QtView.cxx.
References QCanvasRectangle::height(), and QCanvasRectangle::width().
Referenced by drawWithPixmap(), and initPlot().

HippoRectangle QtViewImp::getMarginRect ( ) const [virtual, inherited]

Returns the Rectangle within which points representations are draw.
The coordinate is shifted by position of view on canvas.
Reimplemented from ViewBase.
Definition at line 80 of file QtViewImp.cxx.
References PlotterBase::getMarginRect(), and ViewBase::m_plotter.

PlotterBase * ViewBase::getPlotter ( ) [inherited]

Returns the plotter used by this view.

Definition at line 55 of file ViewBase.cxx.
References ViewBase::m_plotter.

PlotterBase * ViewBase::getPlotter ( ) const [inherited]

Returns the plotter used by this view.

Reimplemented in OpenGLView.
Definition at line 50 of file ViewBase.cxx.
References ViewBase::m_plotter.
Referenced by DisplayController::addTextViewToList(), ViewBaseXML::areDataSourcesSaved(), CutController::connectDataRep(), CanvasView::controlMousePressEvent(), ViewBaseXML::createChild(), CanvasView::fillPlotterList(), CutController::fillTupleCutList(), PyCanvas::findSelectedView(), PyCanvas::getDisplays(), OpenGLView::getPlotter(), CanvasView::getViewFor(), PlotTable::initialize(), DisplayController::removeTextObservers(), PyCanvas::saveAsImage(), CanvasView::saveSelectedAsEps(), CanvasView::setIntervalEnabled(), and CanvasView::viewShowPickTable().

const Range & ViewBase::getRange ( hippodraw::Axes::Type axis ) const [inherited]

Returns the range of the data space on specified axis.

Definition at line 68 of file ViewBase.cxx.
References ViewBase::m_plotter.
Referenced by ContourPointRep::drawContourTicks().


Public Member Functions
	chunks () const
virtual const QFont &	defaultFont ()
virtual void	draw (QPainter &)
	Re-Implements the inherited function from QCanvasPoygonalItem.
virtual void	drawColorLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const std::vector< Color > &colors, float size)
	Draws multiple line segments, each with a different color - that is, a line between x0,y0 and x1,y1, with color[0] =color[1] another between x2,y2 and x3,y3 with color[2]=color[3] and so on.
virtual void	drawLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const Color &color, float size)
	Draws multiple line segments - that is, a line between x0,y0 and x1,y2, another between x2,y2 and x3,y3 and so on.
virtual void	drawMag (float x, float y, int mag, float fontsize, QFont &)
virtual void	drawMag (float x, float y, int mag, float fontsize)
	Draws the exponent on the axis label.
virtual void	drawPoints (const std::vector< double > &x, const std::vector< double > &y, const std::vector< Color > &colors, hippodraw::Symbol::Type type, float sym_size)
virtual void	drawPoints (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Symbol::Type type, float sym_size)
virtual void	drawPolyLine (const std::vector< double > &xpoints, const std::vector< double > &ypoints, hippodraw::Line::Style style, const Color &color, float size)
	Draws a polyline.
virtual void	drawSelf ()
	Draws itself.
virtual void	drawShape (QPainter &)
	Overrides pure virtual function of QCanvasPolygonalItem.
virtual void	drawSquare (double x1, double y1, double x2, double y2, int red, int green, int blue)
	Draws a colored square.
virtual void	drawText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize, const FontBase *font)
	Draws a text string at a point in the view's coordinate system.
virtual void	drawText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize)
virtual void	drawUserText (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp)
	Draws a text string at a point in the data coordinate system.
virtual void	drawViewLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, const Color &color, float size)
	Draws multiple line segments.
virtual void	drawViewLines (const std::vector< double > &x, const std::vector< double > &y, hippodraw::Line::Style style, bool color, float size)
	Draws multiple line segments.
virtual void	drawViewSquare (float x1, float y1, float x2, float y2, int red, int green, int blue)
	Draws a colored square in view space.
virtual void	endPlot ()
	Finalizes the plot view by unlocking the QApplication.
virtual void	fillPickedPoint (double x, double y, std::vector< double > &picked) const
	Fills the picked point vector.
virtual double	getAspectRatio () const
	Get the aspect ratio.
virtual HippoRectangle	getDrawRect () const
	Overrides virtual function of ViewBase.
virtual HippoRectangle	getMarginRect () const
	Returns the Rectangle within which points representations are draw.
PlotterBase *	getPlotter ()
	Returns the plotter used by this view.
PlotterBase *	getPlotter () const
	Returns the plotter used by this view.
const Range &	getRange (hippodraw::Axes::Type axis) const
	Returns the range of the data space on specified axis.
const HippoRectangle &	getUserRect () const
	Is called by the AxisRepBase object (or one of its derived objects), and returns the rectangle where the drawing is made.
	height () const
virtual void	initPlot (double transform_aspect_ratio)
	Initializes a view before drawing.
	QtView (const QtView &)
	The copy constructor.
	QtView (PlotterBase *plotter)
	The constructor.
	rect () const
	rtti () const
void	setCrossX (double val)
	Set the crossX value.
void	setCrossY (double val)
	Set the crossY value.
virtual void	setDefaultFont (const QFont &font)
virtual void	setDrawRect (float x, float y, float width, float height)
	Sets the drawing rectangle in the paint device space.
void	setDrawRect (const QRect &rect)
	Sets the drawing rectangle in the paint device space.
void	setInspector (QObject *)
	Sets the receiver of update messages.
virtual void	setPageWidth (int upage_w)
	Set the page width.
virtual void	setPlotter (PlotterBase *plotter)
	Sets the PlotterBase object to plotter.
virtual void	setShowCrossHairs (bool flag)
	Sets display status of cross-hairs.
	setSize (int width, int height)
	size () const
int	toView (double x) const
	Converts the view space coordinate x expressed as a `double` to one expressed as an `int`.
int	toViewX (double datX) const
	Converts the data space coordinate X to the view space coordinate X.
int	toViewY (double datY) const
	Converts the data space coordinate Y to the view space coordinate Y.
virtual void	update (const Observable *)
	Responds to Obvervable update message.
float	userToDrawColor (double c) const
	Converts a coordinate in user space to drawing space along the color (X) axis.
float	userToDrawX (double x) const
	Converts a coordinate in user space to drawing space along the X axis.
float	userToDrawY (double x) const
	Converts a coordinate in user space to drawing space along the Y axis.
	width () const
virtual void	willDelete (const Observable *)
	Notifies `this` Observer object that one of its Observable objects is about to be deleted.
virtual	~QtView ()
	The required virtual destructor.
Protected Member Functions
virtual void	draw_Text (const std::string &s, float x, float y, float fontsize, float angle, char xp, char yp, bool resize, QFont &font)
Protected Attributes
QFont	m_font_default
QObject *	m_inspector
	The receiver of update messages.
QPainter *	m_painter
	The current Qt QPainter object.
PlotterBase *	m_plotter
	The plotter object used by this view.
Private Member Functions
void	drawMethod (const std::vector< double > &x, const std::vector< double > &y, int opt1, int opt2)
	Draws in the view using the specified method.
void	drawViewMethod (const std::vector< double > &x, const std::vector< double > &y, int opt1, int opt2)
	Draws in the view using the specified method.
void	drawWithPixmap (QPainter &painter)
	Does the drawing with QPixmap cache instead of directly to paint device.
void	ensureOffScrSize (int osw, int osh)
	Used by the double buffering done in method draw.
int	toCanvasX (double dx) const
	Converts coordinate from view space to canvas space.
int	toCanvasY (double dy) const
	Converts coordinate from view space to canvas space.
void	transformAndFill (QPointArray &array, const std::vector< double > &x, const std::vector< double > &y, int(QtView::xfunc)(double) const, int(QtView::yfunc)(double) const )
	Fills the array with QPoint objects whose coordinates are in the QPaintDevice space from the vectors x and y whose coordinates are in the data space.
Private Attributes
bool	m_crosshairs
	A flag indicating if cross-hairs should be drawn.
bool	m_filled
	A flag indicating if the buffer pixmap has been filled.
bool	m_is_drawing
	A flag set true when drawing has stared.
QPixmap	m_pixmap
	A QPixmap used for buffer the plot.
int	m_upage_w
	Page width.