Lazarus

TRichView components can be used in Lazarus.

The following platforms are supported:

▪Windows (32-bit and 64-bit)

▪Linux (GTK2 widgetset + Cairo canvas for printing)

Currently, the following sets of components are ported to Lazarus:

▪TRichView

▪RvHtmlImporter

▪RichViewXML

▪ASpell parser (Windows only)

▪HunSpell parser (Windows only)

▪VirtualTree support (Windows only).

TRVOfficeConverter and TRVASpell use 32-bit DLL, so they can be only in Win32 applications.

Limitations

Common limitations

The following functions are not available in Lazarus:

▪gestures (text selection and print preview zooming with fingers)

▪mouse panning (scrolling by clicking a middle mouse button and then moving the mouse)

▪gif and metafile images (unless you find Lazarus-compatible graphic components that is able to display, load and save these formats)

▪when dragging an image from TRichView, it is not provided as a bitmap (however, TRichViewEdit still accepts bitmaps dragged into it)

▪LiveBindings

Additional Linux limitations

The following functions are not available in Lazarus for Linux:

▪advanced character properties (horizontal scaling, character spacing)

▪distribute alignment for paragraphs (justification by increasing character spacing)

▪cell rotation in tables

▪drag and drop

A quality of print preview is low in Lazarus for Linux. It can be improved by assigning TRVPrintPreview.CachePageImage = True.

Strings

UTF-16 strings

Most methods and properties in the components have TRVUnicodeString parameters, which is defined as UnicodeString in Lazarus. These string contain Unicode (UTF-16) text.

ANSI strings

Parameters in ***A methods have TRVAnsiString parameters, which is defined as AnsiString in Lazarus. They are treated as ANSI string (not UTF-8!).

These methods include:

▪in TRichView: AddNLA, AddTextNLA, GetItemTextA, GetSelTextA, GetWordAtA, SearchTextA, SetItemTextA

▪in TRichViewEdit: GetCurrentItemTextA, InsertStringATag, InsertTextA, SearchTextA, SetCurrentItemTextA, SetItemTextEdA

UTF-8 strings

Some methods have String parameters. They are treated as UTF-8 in Lazarus

These methods include:

▪in TRichView: AddFmt, AddNL, AddTextNL, GetItemText, GetSelText, GetWordAt, SearchText, SetItemText

▪in TRichViewEdit: GetCurrentItemText, InsertStringTag, InsertText, SearchText, SetCurrentItemText, SetItemTextEd

Demo projects

TRichView demo projects for Lazarus are in:

▪<TRichView Dir>\TRichView\Demos\Lazarus\

Some add-ins and additional components have Lazarus demo projects as well:

▪<TRichView Dir>\TRichView\Demos\Addins\BlendBitmap\Demo\Lazarus\

▪<TRichView Dir>\TRichView\Demos\Addins\ComboItem\Demo\Lazarus\

▪<TRichView Dir>\RvHtmlImporter\Demos\Lazarus\

▪<TRichView Dir>\ThirdParty\ASpell\Demos\Lazarus\

▪<TRichView Dir>\ThirdParty\HunSpell\Demos\Lazarus\