a class for contour plots More...

#include <gtkmm-plplot/plotcontour.h>

Inheritance diagram for Gtk::PLplot::PlotContour:

[legend]

Public Member Functions
	PlotContour (PlotDataSurface &data, const Glib::ustring &axis_title_x="X-axis", const Glib::ustring &axis_title_y="Y-axis", const Glib::ustring &plot_title="", unsigned int nlevels=6, Gdk::RGBA edge_color=Gdk::RGBA("red"), double edge_width=PLOTDATA_DEFAULT_LINE_WIDTH, const double plot_width_norm=1.0, const double plot_height_norm=1.0, const double plot_offset_horizontal_norm=0.0, const double plot_offset_vertical_norm=0.0)

virtual	~PlotContour ()

void	set_edge_color (Gdk::RGBA color)

Gdk::RGBA	get_edge_color ()

void	set_edge_width (double width)

double	get_edge_width ()

void	set_nlevels (unsigned int nlevels)

unsigned int	get_nlevels ()

void	show_labels ()

void	hide_labels ()

bool	is_showing_labels () const

virtual void	draw_plot (const Cairo::RefPtr< Cairo::Context > &cr, const int width, const int height) override

Public Member Functions inherited from Gtk::PLplot::Plot
virtual	~Plot ()

virtual void	remove_data (unsigned int plot_data_index)

virtual void	remove_data (PlotData &plot_data_member)

virtual void	remove_object (unsigned int plot_object_index)

virtual void	remove_object (PlotObject &plot_object_member)

virtual PlotData *	get_data (unsigned int data_index=0) final

void	set_axis_title_x (Glib::ustring title)

void	set_axis_title_y (Glib::ustring title)

Glib::ustring	get_axis_title_x ()

Glib::ustring	get_axis_title_y ()

void	set_plot_title (Glib::ustring title)

Glib::ustring	get_plot_title ()

void	show ()

void	hide ()

bool	is_showing () const

Gdk::RGBA	get_background_color ()

void	set_background_color (Gdk::RGBA color)

Gdk::RGBA	get_axes_color ()

void	set_axes_color (Gdk::RGBA color)

Gdk::RGBA	get_titles_color ()

void	set_titles_color (Gdk::RGBA color)

sigc::signal< void(void)>	signal_changed ()

sigc::signal< void(PlotData *)>	signal_data_added ()

sigc::signal< void(PlotData *)>	signal_data_removed ()

sigc::signal< void(PlotObject *)>	signal_object_added ()

sigc::signal< void(PlotObject *)>	signal_object_removed ()

Public Member Functions inherited from Gtk::PLplot::Object
virtual void	set_manage ()

Public Member Functions inherited from Gtk::PLplot::RegionSelection
virtual	~RegionSelection ()

void	set_region (double xmin, double xmax, double ymin, double ymax)

void	get_region (double &xmin, double &xmax, double &ymin, double &ymax)

bool	get_region_selectable ()

void	set_region_selectable (bool selectable=true)

bool	get_region_zoomable ()

void	set_region_zoomable (bool zoomable=true)

double	get_region_zoom_scale_factor ()

void	set_region_zoom_scale_factor (double scale_factor)

Gdk::RGBA	get_region_selection_color ()

void	set_region_selection_color (Gdk::RGBA color)

double	get_region_selection_width ()

void	set_region_selection_width (double line_width)

bool	get_region_pannable ()

void	set_region_pannable (bool pannable=true)

sigc::signal< void(double, double, double, double)>	signal_select_region ()

sigc::signal< void(double, double)>	signal_cursor_motion ()

sigc::signal< void(double, double)>	signal_cursor_enter ()

sigc::signal< void(void)>	signal_cursor_leave ()

sigc::signal< std::vector< double >(double, double, double, double)>	signal_pan ()

sigc::signal< void(double, double)>	signal_double_press ()

sigc::signal< void(double, double, GdkScrollDirection)>	signal_zoom_region ()

Protected Member Functions
virtual void	plot_data_modified () override
	a method that will update the `_range` variables when datasets are added, modified or removed.

	PlotContour (const Glib::ustring &axis_title_x, const Glib::ustring &axis_title_y, const Glib::ustring &plot_title, unsigned int nlevels, Gdk::RGBA edge_color, double edge_width, const double plot_width_norm, const double plot_height_norm, const double plot_offset_horizontal_norm, const double plot_offset_vertical_norm)

virtual void	add_data (PlotDataSurface &data)

Protected Member Functions inherited from Gtk::PLplot::Plot
virtual void	on_changed ()

virtual void	on_data_added (PlotData *new_data)

virtual void	on_data_removed (PlotData *removed_data)

virtual void	on_object_added (PlotObject *new_object)

virtual void	on_object_removed (PlotObject *removed_object)

virtual void	draw_plot_init (const Cairo::RefPtr< Cairo::Context > &cr, const int width, const int height) final

	Plot (const Glib::ustring &axis_title_x, const Glib::ustring &axis_title_y, const Glib::ustring &plot_title, const double plot_width_norm, const double plot_height_norm, const double plot_offset_horizontal_norm, const double plot_offset_vertical_norm)

Protected Member Functions inherited from Gtk::PLplot::Object
	Object ()

Protected Member Functions inherited from Gtk::PLplot::RegionSelection
virtual void	coordinate_transform_plplot_to_cairo (double x_pl, double y_pl, double &x_cr, double &y_cr) final

virtual void	coordinate_transform_cairo_to_plplot (double x_cr, double y_cr, double &x_pl, double &y_pl) final

virtual void	coordinate_transform_world_to_cairo (double x_wr, double y_wr, double &x_cr, double &y_cr) final

virtual void	coordinate_transform_cairo_to_world (double x_cr, double y_cr, double &x_wr, double &y_wr) final

virtual void	coordinate_transform_world_to_plplot (double x_wr, double y_wr, double &x_pl, double &y_pl)

virtual void	coordinate_transform_plplot_to_world (double x_pl, double y_pl, double &x_wr, double &y_wr)

virtual void	on_select_region (double xmin, double xmax, double ymin, double ymax)

virtual void	on_zoom_region (double x, double y, GdkScrollDirection direction)

virtual void	on_cursor_motion (double x, double y)

virtual void	on_cursor_enter (double x, double y)

virtual void	on_cursor_leave ()

virtual std::vector< double >	on_pan (double old_x, double old_y, double new_x, double new_y)

virtual void	on_double_press (double x, double y)

	RegionSelection ()

	RegionSelection (const RegionSelection &region_selection)=default

Protected Attributes
unsigned int	nlevels
	Number of contour levels to draw.

Gdk::RGBA	edge_color
	Defines pen color used for contours defining edges.

double	edge_width
	Defines line width used for contours defining edges.

bool	showing_labels
	`true` will draw the contour labels, `false` hides them

double	zmin
	Minimum of `z`, used to determine the contour edges.

double	zmax
	Maximum of `z`, used to determine the contour edges.

std::vector< double >	clevels
	Vector containing the data levels corresponding to the edges of each region that will be plotted. To work properly the levels should be monotonic.

Protected Attributes inherited from Gtk::PLplot::Plot
std::vector< PlotData * >	plot_data
	vector that contains pointers to the PlotData datasets

std::vector< PlotObject * >	plot_objects
	vector that contains pointers to the PlotObject datasets

Glib::ustring	axis_title_x
	X-axis title.

Glib::ustring	axis_title_y
	Y-axis title.

Glib::ustring	plot_title
	Plot title.

plstream *	pls
	the `plstream` object that will ensure the connection with PLplot

int	canvas_width
	the width of the canvas in Cairo units

int	canvas_height
	the height of the canvas in Cairo units

int	plot_offset_x
	the offset of the plot with respect to the top left corner of the canvas, measured along the horizontal (X-) axis in Cairo units

int	plot_offset_y
	the offset of the plot with respect to the top left corner of the canvas, measured along the vertical (Y-) axis in Cairo units

int	plot_width
	the current width of the plot in Cairo units

int	plot_height
	the current height of the plot in Cairo units

bool	shown
	`true` means the plot is currently visible, `false` means it is not plotted

Gdk::RGBA	background_color
	the currently used background color of the plot (default = fully transparent white, meaning that the background will be determined by the canvas)

const double	plot_width_norm
	the normalized plot width, calculated relative to the canvas width

const double	plot_height_norm
	the normalized plot height, calculated relative to the canvas height

const double	plot_offset_horizontal_norm
	the normalized horizontal offset from the canvas top left corner, calculated relative to the canvas width

const double	plot_offset_vertical_norm
	the normalized vertical offset from the canvas top left corner, calculated relative to the canvas height

Gdk::RGBA	axes_color
	the currently used color to draw the axes, the box and gridlines. Default is opaque black

Gdk::RGBA	titles_color
	the currently used color to draw the axes and plot titles. Default is opaque black

sigc::signal< void(void)>	_signal_changed
	signal that gets emitted whenever any of the plot parameters, or any of the contained PlotData datasets is changed.

sigc::signal< void(PlotData *)>	_signal_data_added
	signal emitted whenever a PlotData dataset is added to the plot

sigc::signal< void(PlotData *)>	_signal_data_removed
	signal emitted whenever data is removed from the plot.

sigc::signal< void(PlotObject *)>	_signal_object_added
	signal emitted whenever a PlotObject is added to the plot

sigc::signal< void(PlotObject *)>	_signal_object_removed
	signal emitted whenever a PlotObject is removed from the plot.

Protected Attributes inherited from Gtk::PLplot::RegionSelection
double	cairo_range_x [2]
	the current range shown on the plot for the X-axis in Cairo coordinates

double	cairo_range_y [2]
	the current range shown on the plot for the Y-axis in Cairo coordinates

double	plotted_range_x [2]
	the current range shown on the plot for the X-axis in PLplot coordinates (NOT world!!!)

double	plotted_range_y [2]
	the current range shown on the plot for the Y-axis in PLplot coordinates (NOT world!!!)

double	plot_data_range_x [2]
	the maximum range covered by the X-values of the datasets in PLplot coordinates (NOT world!!!)

double	plot_data_range_y [2]
	the maximum range covered by the Y-values of the datasets in PLplot coordinates (NOT world!!!)

sigc::signal< void(double, double, double, double)>	_signal_select_region
	signal that gets emitted whenever a new region was selected using the mouse pointer in Canvas::on_button_release_event()

sigc::signal< void(double, double, GdkScrollDirection)>	_signal_zoom_region
	signal that gets emitted whenever one zooms in on the plot using the mouse scroll wheel in Canvas::on_scroll_event()

sigc::signal< void(double, double)>	_signal_cursor_motion
	signal that will be emitted whenever the cursor (usually the mouse) is moved.

sigc::signal< void(double, double)>	_signal_cursor_enter
	signal that will be emitted whenever the cursor (usually the mouse) enter.

sigc::signal< void(void)>	_signal_cursor_leave
	signal that will be emitted whenever the cursor (usually the mouse) leave.

sigc::signal< std::vector< double >(double, double, double, double)>	_signal_pan
	signal that will be emitted whenever the cursor is moved within a pannable plot while the SHIFT key is pressed in and the left mouse button is pressed.

sigc::signal< void(double, double)>	_signal_double_press
	signal that will emitted whenever a double mouse-click event was recorded within the plot box. Default response will be to reset the region to a range determined by the minima and maxima of the X- and Y- datasets.

Private Member Functions
	PlotContour ()=delete
	no default constructor

	PlotContour (const PlotContour &)=delete
	no copy constructor

PlotContour &	operator= (const PlotContour &)=delete
	no assignment operator

Friends
class	Canvas

Additional Inherited Members
Static Protected Member Functions inherited from Gtk::PLplot::RegionSelection
static void	ensure_valid_range (double &val0, double &val1)
	internal function that ensures valid ranges are always plotted, mostly avoiding case where for either x or y, data min is equal to data max.

Detailed Description

a class for contour plots

A class for conventional contour plots. Construction requires a single PlotDataSurface dataset, and no datasets may be added afterwards. For more beautiful contour plot with shaded regions, check out PlotContourShades. PlotContour features several properties that determine the appearance of the contour. Important is that whenever a property is changed, signal_changed() is emitted, which will eventually be picked up by the canvas that will hold the plot. For more information, the reader is referred to example Example 7: a Simple contour plot.

Constructor & Destructor Documentation

◆ PlotContour() [1/4]

Gtk::PLplot::PlotContour::PlotContour ( )

privatedelete

no default constructor

◆ PlotContour() [2/4]

Gtk::PLplot::PlotContour::PlotContour ( const PlotContour & )

privatedelete

no copy constructor

◆ PlotContour() [3/4]

Gtk::PLplot::PlotContour::PlotContour	(	const Glib::ustring &	axis_title_x,
		const Glib::ustring &	axis_title_y,
		const Glib::ustring &	plot_title,
		unsigned int	nlevels,
		Gdk::RGBA	edge_color,
		double	edge_width,
		const double	plot_width_norm,
		const double	plot_height_norm,
		const double	plot_offset_horizontal_norm,
		const double	plot_offset_vertical_norm
	)

protected

Constructor

This protected constructor is meant to be used in derived classes only to circumvent the problem of calling add_data() in a constructor which calls PlotContour's public constructor.

Parameters

axis_title_x	X-axis title
axis_title_y	Y-axis title
plot_title	plot title
nlevels	the number of contour edges required for the plot
edge_color	the contour edge color, default is red
edge_width	the contour edge width, default is 1.0
plot_width_norm	the normalized plot width, calculated relative to the canvas width
plot_height_norm	the normalized plot height, calculated relative to the canvas height
plot_offset_horizontal_norm	the normalized horizontal offset from the canvas top left corner, calculated relative to the canvas width
plot_offset_vertical_norm	the normalized vertical offset from the canvas top left corner, calculated relative to the canvas height

◆ PlotContour() [4/4]

Gtk::PLplot::PlotContour::PlotContour	(	PlotDataSurface &	data,
		const Glib::ustring &	axis_title_x = `"X-axis"`,
		const Glib::ustring &	axis_title_y = `"Y-axis"`,
		const Glib::ustring &	plot_title = `""`,
		unsigned int	nlevels = `6`,
		Gdk::RGBA	edge_color = `Gdk::RGBA("red")`,
		double	edge_width = `PLOTDATA_DEFAULT_LINE_WIDTH`,
		const double	plot_width_norm = `1.0`,
		const double	plot_height_norm = `1.0`,
		const double	plot_offset_horizontal_norm = `0.0`,
		const double	plot_offset_vertical_norm = `0.0`
	)

Constructor

This class provides a single public constructor, which takes an existing PlotDataSurface dataset to construct a plot. Optionally, the constructor takes additional arguments to set the axes and plot titles, as well as normalized coordinates that will determine the position and dimensions of the plot within the canvas. The default corresponds to the plot taking up the full canvas space.

Parameters

data	a PlotDataSurface object containing a plot dataset
axis_title_x	X-axis title
axis_title_y	Y-axis title
plot_title	plot title
nlevels	the number of contour edges required for the plot
edge_color	the contour edge color, default is red
edge_width	the contour edge width, default is 1.0
plot_width_norm	the normalized plot width, calculated relative to the canvas width
plot_height_norm	the normalized plot height, calculated relative to the canvas height
plot_offset_horizontal_norm	the normalized horizontal offset from the canvas top left corner, calculated relative to the canvas width
plot_offset_vertical_norm	the normalized vertical offset from the canvas top left corner, calculated relative to the canvas height

◆ ~PlotContour()

virtual Gtk::PLplot::PlotContour::~PlotContour ( )

virtual

Destructor

Member Function Documentation

◆ add_data()

virtual void Gtk::PLplot::PlotContour::add_data ( PlotDataSurface & data )

protectedvirtual

Add a single PlotDataSurface dataset to the plot

Parameters

data	dataset to be added to the plot

Exceptions

Gtk::PLplot::Exception

◆ draw_plot()

virtual void Gtk::PLplot::PlotContour::draw_plot	(	const Cairo::RefPtr< Cairo::Context > &	cr,
		const int	width,
		const int	height
	)

overridevirtual

Method to draw the plot with all of its datasets

This method is virtual allowing inheriting classes to implement their own method with the same signature.

Parameters

cr	the cairo context to draw to.
width	the width of the Canvas widget
height	the height of the Canvas widget

Implements Gtk::PLplot::Plot.

Reimplemented in Gtk::PLplot::PlotContourShades.

◆ get_edge_color()

Gdk::RGBA Gtk::PLplot::PlotContour::get_edge_color ( )

Get the current contour edge color

Returns: the currently used contour edge color

◆ get_edge_width()

double Gtk::PLplot::PlotContour::get_edge_width ( )

Get the currently used contour edge width

Returns: the currently used width of the contour edge lines

Exceptions

Gtk::PLplot::Exception

◆ get_nlevels()

unsigned int Gtk::PLplot::PlotContour::get_nlevels ( )

Get the number of contour levels

Returns: The number of contour levels

Exceptions

Gtk::PLplot::Exception

◆ hide_labels()

void Gtk::PLplot::PlotContour::hide_labels ( )

Hides the contour labels

◆ is_showing_labels()

bool Gtk::PLplot::PlotContour::is_showing_labels ( ) const

Returns whether or not the contour labels are currently showing

◆ operator=()

PlotContour & Gtk::PLplot::PlotContour::operator= ( const PlotContour & )

privatedelete

no assignment operator

◆ plot_data_modified()

virtual void Gtk::PLplot::PlotContour::plot_data_modified ( )

overrideprotectedvirtual

a method that will update the _range variables when datasets are added, modified or removed.

Implements Gtk::PLplot::Plot.

◆ set_edge_color()

void Gtk::PLplot::PlotContour::set_edge_color ( Gdk::RGBA color )

Changes the color used for the contour defining edges

Parameters

color The new color that will be used to draw the contour edges

◆ set_edge_width()

void Gtk::PLplot::PlotContour::set_edge_width ( double width )

Sets the width of the contour edge lines

Parameters

width The new width to be used for drawing the contour edge lines

◆ set_nlevels()

void Gtk::PLplot::PlotContour::set_nlevels ( unsigned int nlevels )

Sets the number of contour levels to draw

Note that the actually shown number of edges is equal to nlevels -2! This is because the maximum and minimum values in the z dataset have their own edge, which is just a single dot and is not shown!

Parameters

nlevels The new number of contour levels

◆ show_labels()

void Gtk::PLplot::PlotContour::show_labels ( )

Show the contour labels

Friends And Related Symbol Documentation

◆ Canvas

friend class Canvas

friend

Member Data Documentation

◆ clevels

std::vector<double> Gtk::PLplot::PlotContour::clevels

protected

Vector containing the data levels corresponding to the edges of each region that will be plotted. To work properly the levels should be monotonic.

◆ edge_color

Gdk::RGBA Gtk::PLplot::PlotContour::edge_color

protected

Defines pen color used for contours defining edges.

◆ edge_width

double Gtk::PLplot::PlotContour::edge_width

protected

Defines line width used for contours defining edges.

◆ nlevels

unsigned int Gtk::PLplot::PlotContour::nlevels

protected

Number of contour levels to draw.

◆ showing_labels

bool Gtk::PLplot::PlotContour::showing_labels

protected

true will draw the contour labels, false hides them

◆ zmax

double Gtk::PLplot::PlotContour::zmax

protected

Maximum of z, used to determine the contour edges.

◆ zmin

double Gtk::PLplot::PlotContour::zmin

protected

Minimum of z, used to determine the contour edges.

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PlotContour() [1/4]

◆ PlotContour() [2/4]

◆ PlotContour() [3/4]

◆ PlotContour() [4/4]

◆ ~PlotContour()

Member Function Documentation

◆ add_data()

◆ draw_plot()

◆ get_edge_color()

◆ get_edge_width()

◆ get_nlevels()

◆ hide_labels()

◆ is_showing_labels()

◆ operator=()

◆ plot_data_modified()

◆ set_edge_color()

◆ set_edge_width()

◆ set_nlevels()

◆ show_labels()

Friends And Related Symbol Documentation

◆ Canvas

Member Data Documentation

◆ clevels

◆ edge_color

◆ edge_width

◆ nlevels

◆ showing_labels

◆ zmax

◆ zmin