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0001 -----2.10.0 () -----
0002 New features:
0003         * [worksheet]
0004                 * Bar plots
0005                 * Plot templates - allow to save and re-use custom plot configurations
0006         * [spreadsheet]
0007                 * use a different icon for calculated columns, also show the definition of the formula and parameters in the tooltip text in the project explorer
0008                 * Heatmap formatting for categorical data in text columns
0009         * [import]
0010                 * Import data from Excel .xlsx files using QXlsx library
0011                 * HDF5: support VLEN data import
0012                 * Live data: support multiple values via TCP
0013         * [export]
0014                 * Use the current working project directory, if available, as the default export path
0015         * [analysis]
0016                 * guess start vaues of fit parameter for polynomial models by linear regression
0018 Performance improvements:
0019         * reduce the memory consumption during the spreadsheet export to Sqlite
0020         * reduce the memory consumption when importing from a database table into the spreadsheet
0021         * faster import of files with a big number of columns
0022         * faster creation of a big number of columns in the spreadsheet
0024 Bug fixes:
0025         * [worksheet]
0026                 * don't crash when undoing the step "add info element".
0027                 * don't crash when changing the error bar types in the curve with no x-column selected yet
0028                 * don't show any context menu in the presenter widget
0029                 * use the full screen size in the dynamic presenter widget for worksheets with "use view size" property set to true
0030                 * allow to zoom the view in the dynamic presenter widget
0031                 * fix using custom value label with invalid data points in xy-curve (BUG 455214)
0032                 * don't crash when deleting a text label that was added after worksheet objects (plots and curves) were created via the plot data dialog (BUG 455096)
0033                 * fix displayed end value of date time plot range
0034                 * fix shifts in date time values due to locale settings (BUG 455579)
0035         * [spreadsheet] properly paste the data in the format 'yyyy-MM-dd hh:mm:ss' and similar
0036         * [fit] fix locale usage in evaluation range
0037         * [fit] correctly invalidate fit result when model changes
0040 -----2.9.0 (03.05.2022) -----
0041         * [general]
0042                 * Allow to copy&paste and to duplicate single objects in the project explorer
0043                 * Allow to change the order of objects in the project explorer (move up and down)
0044                 * Added global settings for numbers
0045                 * Color maps manager allowing the access to multiple collections of color maps
0046                 * Show git hash in about dialog for convenience
0047                 * Use system liborigin when available
0048                 * Open new project per default on startup
0049                 * Examples Dialog - an easy way to browse through all available example projects and to open them directly in the application
0050                 * Allow to save the project without the results of the calculations in the analysis curves to reduce the size of project file
0051                 * Use XZ compression of project files per default with compatibility option for older versions of LabPlot
0052                 * Improve preview resolution of distributions and fit functions
0053                 * Add parser functions to generate non-uniform random numbers of several distributions
0054                 * Fuzzy matching when doing search/filter in the Project Explorer
0055         * [analysis]
0056                 * Support Mathieu functions via GSL
0057                 * Support fitting of any distribution to a histogram
0058                 * Added Hilbert transform including envelope
0059                 * Improve entering ranges for various methods
0060         * [import]
0061                 * Add Option to specify header line in ASCII data
0062                 * Import SAS, Stata and SPSS files using readstat library
0063                 * Import MATLAB MAT files using matio library
0064                 * Import LTspice files
0065                 * HDF5: Select first variable when loading file
0066                 * HDF5: Use data type when importing data
0067                 * HDF5: Preview and import 2d data of strings
0068                 * Improved OPJ project import
0069                 * Improve binary data preview and import data types and speed
0070         * [spreadsheet]:
0071                 * Allow to freeze the first column
0072                 * Search in the spreadsheet
0073                 * Conditional heatmap formatting
0074                 * Support value labels
0075                 * Extended statistics dialog - show additional visualizations (histogram, KDE plot, normal Q-Q plot, BoxPlot)
0076                 * List random number distributions alphabetically
0077         * [worksheet]:
0078                 * Info Element - a new worksheet element to annotate curve values on the plot
0079                 * Image Element - allow to embed the image data and save it in the project file
0080                 * BoxPlot
0081                 * Crosshair cursor mode in the plot
0082                 * New themes "Monokai", "ggplot grey", "ggplot dark", "Tufte"
0083                 * Many more curve symbols
0084                 * Allow to specify text label's position in logical plot coordinates
0085                 * Allow to use a custom column to set the text for the axis ticks
0086                 * Allow to resize the plots on the worksheet with the mouse when no layout is active
0087                 * Plot border type - allow to specify which lines of the plot rectangular to draw (left, top, etc.)
0088                 * Support multiple plot ranges
0089                 * Support real scientific notation and improve all formats of axes tick label
0090                 * Support axes auto tick number and improve range auto scaling
0091                 * Optional showing axis scale and offset in plot
0092                 * Add inverse axis scale
0093                 * Add first tick offset to better place axis ticks
0094                 * Rug plot - visualization where the data points are displayed as marks along the axes
0095                 * Tufte's "range frames" - a new mode in Axis to automatically set the start and end points of the axis to the min and max data points
0096                 * Allow to specify which curves should be shown in the plot legend
0097                 * Switched to Poppler for better LaTeX typesetting support
0098                 * Support background color for label
0100 Bug fixes:
0101         * Fitting: Fix missing locale support in evaluating range of fit function
0102         * Fitting: Fix pseudovoigt model
0103         * Fix crash in convolution and correlation
0104         * Windows: use breeze as default for better dark mode
0105         * Properly save the geometry of visible windows in the project
0106         * Interpolation: avoid crash when x data contains invalid data points or is not strictly increasing
0107         * HDF5: Fix reading attribute strings and better handle strings in compound data
0109 -----2.8.2 (01.04.2021) -----
0110 Bug fixes:
0111         * [CAS]
0112                 * Fixed the regression introduced after the python2 backend was deprecated in Cantor
0113                 * Warn about the potential data looses when a project with CAS content is opened but no CAS support is available
0114         * [worksheet]:
0115                 * DateTime support for Custom Points and for Histograms
0116                 * Fix "power of" notations for negative values, show "0" for zero and improve auto precision for small values for axis labels
0117                 * Show all available symbols styles for CustomPoint, the last one was missing
0118                 * Convert the plot range format to datetime also when the first histogram for datetime data was added to the plot
0119                 * Properly restore the saved values column and also save the values formatting properties in the histogram
0120                 * If the deleted columns are being restored, restore the column pointers also in the histograms
0121                 * Properly react in the histogram when data columns are deleted or renamed
0122                 * Save/load the values format in xy-curve
0123                 * React on text changes for values prefix and suffix and not on return pressed event in the curve properties explorer
0124                 * Fix log scale axis for one tick and ln-scale typo
0125                 * Fix sqrt and square axis scale
0126                 * adjust the range format (numeric vs. datetime) also when the the column of the first curve is changed and not only when a new curve is added
0127                 * simplified the naming of the initial axes for the default plot types (box blot with four axes,  etc.) - use "x" instead of "x axis 1", etc.
0128                 * export to more image formats (jpg, bmp, ppm, xbm, xpm)
0129         * [spreadsheet]
0130                 * show column statistics also for bigint columns
0131                 * when selecting a column in the project explorer, make sure it becomes visible in the spreadsheet by scrolling horizontaly to its position
0132                 * when removing or inserting rows in the spreadsheet, properly update the headers in the spreadsheet
0133         * [import]
0134                 * Don't try to parse a netCDF file when the application was compiled without any support for netCDF, and similar for other formats
0135                 * Show the last recently imported projects in a combobox also in ImportProjectDialog similar to how it's already done in ImportFileDialog
0136                 * Don't show any error messages when the source file or local socket is empty when the import dialog is opened for the first time
0137                 * Fixed ASCII import when start column > 1
0138         * Don't change the current selection in the Project Explorer when objects are being added or removed during undo or redo
0139         * Improved LaTeX support in export dialog and export of big spreadsheets
0140         * BUG 427190 - Fixed resetting parser error count on some platforms (Debian, Manjaro)
0141         * BUG 429110 - Support semicolon as function argument separator for locale with comma as decimal separator
0142         * BUG 429368 - Fix validation of custom model equation in fit dock
0143         * BUG 431535 - Save/Load value format
0144         * BUG 432291 - Show the relevant parts of the drop lines also when the data points are outside of the plot range
0146 -----2.8.1 (13.11.2020) -----
0147         * [worksheet] allow to change the background color for axis labels (default: transparent)
0148         * [worksheet] allow to copy the plot cursor cordinates
0149         * [spreadsheet] better auto-detection of datetime format for values pasted in the spreadsheet
0150         * [live data] allow to add the timestamp column for all network live sources (TCP/UDP), not only for MQTT
0151         * [live data] better error handling and user notifications
0153 Bug fixes:
0154         * Fix compiling with Cantor 20.08.X and X>0
0155         * Fix drawing lines between points of datetime data
0156         * Fix drawing axis tick label in color when in HTML mode
0157         * Fix size of dock widgets when changing between them
0158         * BUG 389920 - remove sub-window shadow remnants when closing the project
0159         * BUG 428029 - changing font of text label for newer Qt versions
0160         * BUG 428813 - full screen not restored (also fixed full screen on macOS)
0161         * BUG 428698 - Don't crash when doing drag&drop between different main windows
0162         * Fix missing settings dialog on macOS
0163         * Parser improvements (found in "Generate Function Values"):
0164                 * Fix Crash using variable name of pre-defined functions as function ("sin()")
0165                 * Allow variable names containing function names ("sina")
0166                 * Correctly remove variables when changing name
0167                 * Use application number locale
0168                 * insert predefined functions with correct number of arguments
0170 -----2.8 (16.09.2020) -----
0171         * Improved DateTime data support
0172         * Show the size of the members in the JSON file in the import file dialog
0173         * [worksheet] In the Export Worksheet Dialog allow to export to the clipboard
0174         * [worksheet] Allow to move plots, text labels and legend with arrow keys
0175         * [worksheet] Image worksheet element
0176         * [worksheet] Reference line on the plot
0177         * [worksheet] Support for imperial units for geometry and size settings of objects
0178         * [worksheet] Improve axes major and minor tick settings
0179         * [spreadsheet] show infinite values as such and not as NaN
0180         * [spreadsheet] support big integer (64 bit) as data type
0181         * [spreadsheet] column normalization methods "divide by max", "divide by min", etc.
0182         * [spreadsheet] Tukey's ladder of powers
0183         * [spreadsheet] added the size of the data set, its mode, 1st and 3rd quartiles and IQR to the column statistics
0184         * [analysis] calculate and expose the rough values as the result of a smooth (data = smooth + rough)
0185         * Allow to open Cantor and Jupyter projects
0186         * [Windows] improved craft blueprint and installer package
0187         * [macOS] added support for touchbar
0188         * Support global user specified decimal separator
0189         * Improved locale support in number input fields
0190         * Extended "About"-Dialog
0192 Bug fixes:
0193         * BUG 421193 - import float(4) data from hdf5
0194         * BUG 418390 - Ignore infinite values (created in CAS worksheets for example) in curves
0195         * BUG 412455 - Don't crash (sporadically) when opening the color scheme menu
0196         * BUG 415214 - Better algorithm to draw the error bar caps
0197         * BUG 413397 - Properly handle removal of columns in the spreadsheet model
0198         * BUG 413401 - In plot data dialog, don't add new worksheets as children to workbooks, use the proper parent aspect
0199         * Fix Cantor support and Unicode characters on Windows
0200         * Fix evaluating fit residuals
0202 -----2.7 (24.10.2019)-----
0203 New features:
0204         * Allow to move objects (drag&drop) to different folders in the project explorer
0205         * [spreadsheet] allow to insert multiple rows and columns in one step
0206         * [spreadsheet] improved the handling of calculated columns (values calculated via a formula):
0207                 * Allow to automatically update the calculated column on data changes in the variable columns
0208                 * Invalidate the calculated column if one of the variable columns was deleted
0209                 * In "Functions Values" dialog highlight the variable column combobox red if the variable column was deleted in the project
0210                 * In "Functions Values" dialog don't allow to select columns to be calculated as variable columns (avoid circular dependencies)
0211                 * In "Used in" context menu of a column show all other calculated columns where this column is used as a variable
0212         * [spreadsheet] when pasting data into empty columns, automatically convert their type to the type of the data to be pasted
0213         * Automatically update curves if a data column deleted before was re-added again (during the import or manually)
0214         * When auto-scaling in the plot take also the error bars into account, if available
0215         * For live data sources allow to save the relative path to the data source
0217 UX improvements:
0218         * in the "Import Data" dialog show the history of the recently imported files
0219         * Improved the selection of curves in the plot that are near to or behind each other
0220         * BUG 408529 - Allow to use DEL to delete cells in spreadsheet and matrix
0221         * BUG 408537 - Allow to insert multiple rows and columns in the spreadsheet in one step
0222         * Added translations to Windows and macOS packages
0223         * Allow to stop the current selection in the plot with ESC
0224         * BUG 410855 - Seed the random number generator with the current time in order not to generate repetitive numbers in the spreadsheet.
0226 Performance:
0227         * Increased the plotting speed for curves with many data points by removing points which are shown on the same pixel in the scene
0229 Bug fixes:
0230         * Disable auto-scale when zooming, otherwise wrong (= auto scaled) data region is shown after project save&open
0231         * [macOS] fix determining number of lines of data files
0232         * Bug 408530 - correctly show error bars for data source columns having NANs
0233         * Bug 407847 - fixed the broken project import
0234         * Bug 411122 - fixed missing option for the resolution of PNG files in the export dialog
0235         * BUG 406805 - support for directory structures in ROOT files
0236         * [data fitting] handle weighted fitting with zero errors correctly
0237         * [data fitting] allow weighted fitting with data source from curve
0238         * [data fitting] fix function for calculating bounded values
0239         * [nsl] fix memory leak in line simplification (Douglas Peuker variant)
0240         * [nsl] fix bug in calculating Bessel polynomials on Windows (used in Bessel filter)
0242 -----2.6 (19.04.2019)-----
0243 New features:
0244         * Histogram
0245         * Import from MQTT sources
0246         * Import of ROOT (CERN) TH1 histograms
0247         * Import of Ngspice raw files (ASCII and binary)
0248         * Import of data in JSON format (JSON arrays and objects)
0249         * Improved import of NetCDF files
0250         * Added file type specific summary and content for special file types in info box of import dialog
0251         * Convolution/Deconvolution of data sets (sampling interval, linear/circular, normalization, wrap, standard kernel)
0252         * Cross-/Autocorrelation of data sets (sampling interval, linear/circular, normalization)
0253         * Allow to specify the number format when exporting spreadsheet and matrix
0254         * Improved user interface for data fitting (add fit function preview, show parameters directly, make options foldable)
0255         * [spreadsheet] when filling a float column with row numbers, automatically convert its type to integer
0256         * [spreadsheet] when filling an integer column with function values, automatically convert its type to float
0257         * [spreadsheet] data manipulation: add/subtract/multiply/divide for column values
0258         * [spreadsheet] export to SQLite
0259         * [matrix] data manipulation: add/subtract/multiply/divide for matrix values
0260         * [worksheet] Allow to specify different border shapes for labels (rectangle, eclipse, etc.)
0261         * [worksheet] Allow to rotate plot legends
0262         * [worksheet] Better positioning of rotated axis tick labels
0263         * [worksheet] Allow to make plots not-interactive (ignore mouse drag and wheel events) to avoid unwanted occasional panning and zooming
0264         * Allow to connect to SQL databases via ODBC
0265         * Show the amount of consumed memory in the status bar (optional)
0266         * Allow to change the settings for different computer algebra systems (Maxima, etc.) directly in LabPlot (embedd Cantor's settings widgets)
0268 Bug fixes:
0269         * Fixed several problems in live data support
0270         * [spreadsheet] properly calculate function values out of integer x-values
0271         * [matrix] fix editing integer values
0272         * [import] fix preview update and add missing close of netcdf files
0273         * Don't crash when a scaling factor equal to zero was set for axis
0275 -----2.5 (21.06.2018)-----
0276 New features:
0277         * Support for reading and plotting of live-data
0278         * Improved data fitting
0279                 * Automatically guess parameter of custom models
0280                 * Better result presentation
0281                 * Support different weight types
0282                 * Consider given x- and y-error when fitting (can be switched off)
0283                 * Show t statistics, P > |t| and confidence interval
0284                 * Calculate p-value for chi-square and F test in nonlinear fitting
0285                 * added fit models for most statistical distributions
0286         * Improved theming
0287                 * Apply themes to worksheet and to all its children
0288                 * Respect theme settings also in plot legends and labels
0289                 * Allow to disable theming in worksheets and plots after a theme was selected
0290                 * Show currently active theme in the "Apply theme" button
0291                 * New application option in the settings for the default theme used for new worksheets.
0292         * Support different data types
0293                 * auto detect integer and datetime data in import
0294                 * support number locale and datetime formats
0295                 * improved data type support in spreadsheets
0296         * Import from SQL databases (tables or custom queries)
0297         * Import Origin OPJ projects
0298         * Much better support for Windows and macOS
0299         * Syntax highlighting for LaTeX in the text label
0300         * Allow to set the background color for LaTeX labels
0301         * Support Hermite polynomials from GSL 2.4
0302         * Support error functions and related functions from libcerf
0303         * "Used in" sub-menu in column contex menu for faster navigation to the curves consuming the column
0304         * Direct application of analysis functions (smoothing, interpolating, etc.) on the ploted data via curve's context menu
0305         * Direct application of analysis functions  on the data in the spreadsheet and plotting of the results via spreadsheet's context menu
0306         * Drag columns in the project explorer and drop them on plots (either in a worksheet view or in the project explorer) to create curves
0307         * "Show last N points" and "Show first N points" data ranges in cartesian plot
0308         * Added CLI option --presenter to start LabPlot directly in the presenter mode
0309         * Added CLI parameter to directly open project files (LabPlot or Origin)
0310         * Allow drag&drop of projects files (LabPlot and Origin) on the main window to load the project
0311         * Allow drag&drop of data files on the main window to import the data
0312         * Show tooltips for the supported mathematical functions and constants in the expression text field
0313         * Automatically switch to the scientific representation for numbers bigger than 10^4 on the axis tick labels
0314         * Automatically allow the latex typesetting in the application after the latex environment was installed later without making the user to go to the settings dialog
0315         * Allow to change the color scheme for the application
0316         * Smooth and animated zooming in the worksheet view
0317         * Allow to add text labels to plots
0318         * Improved building with MSVC, Intel and PGI compiler
0320 Performance improvements:
0321         * Faster copy&paste in the spreadsheet
0323 Bug fixes:
0324         * Bug 379877 - masked rows in spreadsheet not restored in project
0325         * Calculation of fit results corrected
0326         * Axes now support values larger than FLT_MAX (~10^38) and smaller than FLT_MIN (~10^-38)
0327         * When a LabPlot project is being droped in the main window, load the project directly instead of showing the import file dialog
0328         * Correctly save and restore masked cells
0329         * Don't crash if the rc-file was not found during the startup
0331 -----2.4 (09.04.2017)-----
0332 New features:
0333         * Support themes for plots
0334         * Import and editing of FITS data files
0335         * Data reduction by removing data points using multiple algorithms
0336         * Numerical differentiation and integration with several options
0337         * Many new pre-defined fit models (Gompertz, Weibull, Log-Normal, Gumbel, etc.) sorted in categories
0338         * Fit parameter now support fixed values, lower/upper limits and use Unicode
0339         * Fit model and random number distribution formulas are now rendered with LaTeX
0340         * Support user specified x range in all analysis functions
0341         * Allow to enter complete LaTeX documents in text labels
0342         * Configuration parameter to use different LaTex engines (LuaLaTex, XeLatex, pdfLaTex, LaTex)
0343         * Disable LaTeX typesetting if no LaTex installation (and other required tools) were found at runtime
0344         * Presenter mode for worksheets
0345         * Support for Mac OS
0346         * Support for Julia's vectors and tuples in CAS worksheets (requires Cantor v. 16.12 or higher)
0347         * Allow to jump directly to the data source spreadsheet via XYCurve's context menu
0348         * Select and delete multiple objects in project explorer
0349         * Improved and extended internal parser for mathematical expressions
0350         * Copy of worksheet elements as image to the clipboard via CTRL+C
0352 Bug fixes:
0353         * BUG: 361326 - Allow to select curves with overlapping bounding boxes
0354         * Correctly load worksheet sizes from saved templates
0355         * Fixed crash when removing columns in spreadsheet
0356         * Fixed crash when fitting using GSL >= 2
0357         * List of available functions corrected
0358         * Constants are now available with full accuracy
0359         * Windows: Import of files and open recent files fixed
0361 -----2.3 (23.07.2016)-----
0362 New features:
0363         * Integration of Cantor - Support for different open-source computer algebra systems
0364         * Statistics on spreadsheets and matrices
0365         * Export of spreadsheets and matrices to LaTeX tables
0366         * Interpolation of data including different splines, cosine, exponential, cubic Hermite (Catmull-Rom, cardinal, Kochanek-Bartels) and rational functions
0367         * Data smoothing using moving average (centered or lagged), percentile filter or Savitzky-Golay algorithm
0368         * Fourier filter (low pass, high pass, band pass, band reject) with ideal, Butterworth, Chebychev I+II, Legendre or Bessel-Thomson filter
0369         * Fourier transform with many window functions (Welch, Hann, Hamming, etc.) calculating magnitude, amplitude, power, phase, dB, etc. and supporting
0370                 one/two sided spectrum with or without shift and x scaling to frequency, index or period
0371         * Filter and search capabilities in the drop down box for the selection of data sources
0372         * Sigmoid function as a new pre-defined fit model
0373         * Support for compiling on Microsoft Windows
0375 Performance improvements:
0376         * Faster generation of random values
0377         * Global option to enable/disable the double-buffering for faster painting of curves (enabled on default)
0379 Bug fixes:
0380         * Save and restore last used setting in RandomValuesDialog
0381         * Update axis title shape on title rotations correctly
0382         * Save and restore custom column widths in the spreadsheet
0383         * Fixed sporadic crashes during project close
0385 -----2.2 (29.03.2016)-----
0386 New features:
0387         * Datapicker - tool for extracting curves and data points from imported images
0388         * Custom point on the plot with user-defined position and appearance
0389         * Accept drag&drop events
0390         * Support GSL 2.x
0391         * Import and export dialogs save and restore their settings and sizes
0393 Performance improvements:
0394         * Faster rendering of the image view of the matrix
0396 Bug fixes:
0397         * BUG: 354744 - make setting of range auto scaling in CartesianPlot undo/redo-able
0398         * Removed couple of hard coded sizes given in pixels for better user-experience on hidpi-displays
0399         * Fixes the bug with disabled undo/redo-actions in after the undo-history was cleared
0400         * Keep the information about the columns to be shown in the project explorer after project close
0401         * Fixed some bugs in painting of the selection band on the worksheet
0402         * Allow to open gz- and bz2-compressed LabPlot project files on the command line interface
0404 -----2.1 (25.10.2015)-----
0405 New features:
0406         * New Matrix view for handling matrix data.
0407         * Workbook - a new container for grouping several objects of type Spreadsheet and/or Matrix.
0408         * Import of binary, image, NetCDF and HDF data into spreadsheet or matrix.
0409         * Visual HDF and NetCDF parser to view content of files and import data sets.
0410         * Preview of all supported file types in import dialog.
0411         * Transparently import compressed data files.
0412         * In xy-curve the points may not be connected by the line if there are NANs in-between. This behaviour is controlled by the parameter "skip gaps".
0413         * Multiplier of Pi format of the plot axis for periodical functions.
0414         * New operations on columns in Spreadsheet - reverse, drop values and mask values.
0415         * Formula used to generate the values in a column is stored and can be changed/adjusted in the formula dialog afterwards.
0416         * Curve filling: the area below, under, left to or right to the curve can be filled.
0417         * Support for multiple variables in "Function Values"-dialog - new data in the spreadsheet can be calculated out of multiple columns.
0419 Performance improvements:
0420         * Speeded up the creation of new columns during the import
0422 Bug fixes:
0423         * Fixed wrong behaviour when doing "zoom&select" in a plot and then deselecting the plot - it was not possible anymore to select the plot again on the worksheet.
0425 -----2.0.2 (15.03.2015)-----
0426 New features:
0427         * Plot 2D-curves defined by mathematical equations in cartesian and polar coordinates or via a parametric equation.
0428         * Linear and non-linear regression analysis. Several predefined fit-models are provided. User-defined models are also possible.
0429         * Besides fixed worksheet sizes (predefined sizes like A4 etc. or user-defined), complete view size can be used. All sizes are automatically adjusted on resize.
0430         * Different axis arrow types.
0431         * "select region and zoom in", "select x-region and zoom in", "select y-region and zoom in" functions for cartesian plot.
0432         * Rounded border for several worksheet objects  (plot area, legend etc.)
0433         * Hover effect for axis, curve and text label.
0434         * Added a MessageBox - ask befor deleting worksheet objects.
0435         * Added three new types for drop lines - "zero baseline", "min baseline" and "max baseline"
0436         * Fill the selection in Spreadsheet with a constant value provided by the user
0437         * Fill columns with uniform and non-uniform random numbers, several distributions are available.
0438         * Fill columns with function values
0439         * Allow custom resolutions for PNG-export
0440         * Export of the spreadsheet to a text file.
0441         * Simultaneous zooming and navigation accross multiple plots.
0442         * Implemented "Powers of 10/2/e" for the axis tick labels
0444 Bug fixes:
0445         * Don't crash when trying to create a plot in case no rc-file was installed.
0446         * Don't allow to select unwanted objects in TreeViewComboBox in ImportDialog and XYCurveDock.
0447         * Corrected painting of background images in plot area and legend.
0448         * BUG: 330723 - fixed weird selection in spreadsheet.
0449         * BUG: 330774 - fixed wrong positioning of axis on orientation changes.
0450         * Update main window title when project name is changed
0452 -----2.0.1 (01.03.2014)-----
0453 Bug fix release. Solved issues:
0454         * Fixed wrong scaling of legend's text labels in pdf-export
0455         * Fixed memory corruption in CartesianPlotDock that can lead to crashes
0457 -----2.0.0 (19.01.2014)-----
0458 First stable release of LabPlot2. LabPlot2 is a complete rewrite of LabPlot1 and lacks in this release a lot of features available in the predecessor. On the other hand, the GUI and the usability is more superior as compared to LabPlot1 and there are several new features that were not available in LabPlot1.
0460 Brief summary of features and capabilities of LabPlot2 implemented in the first release:
0461         * project-based management of data
0462         * created objects are organized in a tree and are visualized and accessible in the project explorer
0463         * for a better management of objects, additional folders and sub-folders can be created within a project
0464         * spreadsheet with very basic functionality is available for manual data entry
0465         * "file data source" can be used to import a file and to let LabPlot2 watch for changes in that file
0466         * external data from an ascii file can be also directly imported to a spreadsheet for further editing
0467         * worksheet is the main object where plots, labels etc. are placed on
0468         * several zooming functions for the worksheet
0469         * only cartesian plot is implemented in the first release
0470         * arbitrary number of freely positionable axes is possible
0471         * xy-curve is implemented. As the data source for the x- and y-values columns either from a spreadsheet
0472           or from a file data source can be used
0473         * several zooming and "movement" functions are available for the plots which help to navigate through data
0474         * legend for xy-plots
0475         * a lot of properties of the worksheet elements can be edited in a very easy way in the corresponding dock widgets
0476         * plots on the worksheet can be put into a horizontal, vertical or grid layouts
0477         * export of worksheet (entire worksheet or current seleciton) to pdf, eps, png and svg