Table of Contents

Editing and formatting

Text selection

// Select all
RichEditor1.SelectAll;

// Select a range (character offset, length)
RichEditor1.Select(10, 5);

// Deselect
RichEditor1.ClearSelection;

Character formatting

Apply formatting to the current selection or the cursor position (affects new typing):

Property Type Description
Bold Boolean Bold text
Italic Boolean Italic text
Underline Boolean Underline
StrikeThrough Boolean Strikethrough
SuperScript Boolean Superscript
SubScript Boolean Subscript
FontName String Font family
FontSize Single Font size in points
FontColor TAlphaColor Text color 
// Make selected text bold and red
RichEditor1.Bold := True;
RichEditor1.FontColor := gcRed;

Reading the same properties returns the formatting at the cursor or in the selection.

Paragraph formatting

Property Type Description
HorizontalTextAlign TTMSFNCGraphicsTextAlign gtaLeading, gtaCenter, gtaTrailing, gtaJustify
LineSpacing Single Line spacing multiplier 
RichEditor1.HorizontalTextAlign := gtaCenter;

Lists

// Toggle ordered (numbered) list
RichEditor1.OrderedList := True;

// Toggle unordered (bulleted) list
RichEditor1.UnorderedList := True;

Indentation

RichEditor1.Indent;    // increase indent
RichEditor1.Outdent;   // decrease indent

Undo and redo

if RichEditor1.CanUndo then RichEditor1.Undo;
if RichEditor1.CanRedo then RichEditor1.Redo;

Inserting text

// Insert at cursor position
RichEditor1.InsertText('Hello, world!');

Reading content

// Plain text
var plain := RichEditor1.PlainText;

// HTML
var html := RichEditor1.HTML;

Combining programmatic editing, formatting, and content retrieval

RichEditor1.SelectAll;
RichEditor1.Delete;

// Heading
RichEditor1.FontSize := 18;
RichEditor1.Bold := True;
RichEditor1.InsertText('Project Report');
RichEditor1.Bold := False;
RichEditor1.FontSize := 12;
RichEditor1.InsertLineBreak;
RichEditor1.InsertLineBreak;

// Paragraph
RichEditor1.HorizontalTextAlign := gtaLeading;
RichEditor1.InsertText(
  'This report summarizes the work completed in Q2.');
RichEditor1.InsertLineBreak;
RichEditor1.InsertLineBreak;

// Bulleted list
RichEditor1.UnorderedList := True;
RichEditor1.InsertText('Feature A completed');
RichEditor1.InsertLineBreak;
RichEditor1.InsertText('Feature B in progress');
RichEditor1.InsertLineBreak;
RichEditor1.UnorderedList := False;
  • TTMSFNCRichEditor — Bold, Italic, Underline, FontName, FontSize, FontColor, InsertText, SelectAll, Undo, Redo

See also

  • Images and links — embed images and insert hyperlinks
  • Toolbar — connect the toolbar for interactive formatting