panda3d.core.TextAssembler¶

from panda3d.core import TextAssembler

class TextAssembler¶

This class is not normally used directly by user code, but is used by the TextNode to lay out a block of text and convert it into rows of Geoms according to the TextProperties. However, user code may take advantage of it, if desired, for very low-level text operations.

Inheritance diagram

__init__(copy: TextAssembler) → None¶

__init__(encoder: TextEncoder) → None

assign(copy: TextAssembler) → TextAssembler¶

Return type: TextAssembler

clear() → None¶: Reinitializes the contents of the TextAssembler.

setUsageHint(usage_hint: UsageHint) → None¶: Specifies the UsageHint that will be applied to generated geometry. The default is UH_static, which is probably the right setting, but if you know the TextNode’s geometry will have a short lifespan, it may be better to set it to UH_stream. See geomEnums.h.

getUsageHint() → UsageHint¶

Returns the UsageHint that will be applied to generated geometry. See setUsageHint().

Return type: UsageHint

setMaxRows(max_rows: int) → None¶

If max_rows is greater than zero, no more than max_rows will be accepted. Text beyond that will be truncated.

Setting this will not truncate text immediately. You must follow this up with a call to setWtext() to truncate the existing text.

getMaxRows() → int¶: If max_rows is greater than zero, no more than max_rows will be accepted. Text beyond that will be truncated.

setDynamicMerge(dynamic_merge: bool) → None¶: Sets the dynamic_merge flag. See TextNode.setFlattenFlags().

getDynamicMerge() → bool¶: Returns the dynamic_merge flag. See TextNode.setFlattenFlags().

setMultilineMode(flag: bool) → None¶: Sets the multiline mode flag. Set the multiline mode to allow text to wrap. It defaults to true.

getMultilineMode() → bool¶: Returns the multline_mode flag. See TextNode::set_multiline_mode().

setProperties(properties: TextProperties) → None¶: Specifies the default TextProperties that are applied to the text in the absence of any nested property change sequences.

getProperties() → TextProperties¶

Returns the default TextProperties that are applied to the text in the absence of any nested property change sequences.

Return type: TextProperties

getProperties(n: int) → TextProperties

Returns the TextProperties in effect for the object at the indicated position in the pre-wordwrapped string.

Return type: TextProperties

getProperties(r: int, c: int) → TextProperties

Returns the TextProperties in effect for the object at the indicated position in the indicated row.

Return type: TextProperties

setWtext(wtext: str) → bool¶

Accepts a new text string and associated properties structure, and precomputes the wordwrapping layout appropriately. After this call, getWordwrappedWtext() and getNumRows() can be called.

The return value is true if all the text is accepted, or false if some was truncated (see setMaxRows()).

setWsubstr(wtext: str, start: int, count: int) → bool¶

Replaces the ‘count’ characters from ‘start’ of the current text with the indicated replacement text. If the replacement text does not have count characters, the length of the string will be changed accordingly.

The substring may include nested formatting characters, but they must be self-contained and self-closed. The formatting characters are not literally saved in the internal string; they are parsed at the time of the setWsubstr() call.

The return value is true if all the text is accepted, or false if some was truncated (see setMaxRows()).

getPlainWtext() → str¶

Returns a wstring that represents the contents of the text, without any embedded properties characters. If there is an embedded graphic object, a zero value is inserted in that position.

This string has the same length as getNumCharacters(), and the characters in this string correspond one-to-one with the characters returned by get_character(n).

getWordwrappedPlainWtext() → str¶

Returns a wstring that represents the contents of the text, with newlines inserted according to the wordwrapping. The string will contain no embedded properties characters. If there is an embedded graphic object, a zero value is inserted in that position.

This string has the same number of newline characters as getNumRows(), and the characters in this string correspond one-to-one with the characters returned by get_character(r, c).

getWtext() → str¶

Returns a wstring that represents the contents of the text.

The string will contain embedded properties characters, which may not exactly match the embedded properties characters of the original string, but it will encode the same way.

getWordwrappedWtext() → str¶

Returns a wstring that represents the contents of the text, with newlines inserted according to the wordwrapping.

The string will contain embedded properties characters, which may not exactly match the embedded properties characters of the original string, but it will encode the same way.

Embedded properties characters will be closed before every newline, then reopened (if necessary) on the subsequent character following the newline. This means it will be safe to divide the text up at the newline characters and treat each line as an independent piece.

calcR(n: int) → int¶

Computes the row index of the nth character or graphic object in the text and returns it.

If the nth character is not a normal printable character with a position in the wordwrapped string, returns -1 (for instance, a soft-hyphen character, or a newline character, may not have a corresponding position).

calcC(n: int) → int¶

Computes the column index of the nth character or graphic object in the text and returns it.

If the nth character is not a normal printable character with a position in the wordwrapped string, returns -1 (for instance, a soft-hyphen character, or a newline character, may not have a corresponding position).

calcIndex(r: int, c: int) → int¶

Computes the character index of the character at the rth row and cth column position. This is the inverse of calcRC().

It is legal for c to exceed the index number of the last column by 1, and it is legal for r to exceed the index number of the last row by 1, if c is 0.

getNumCharacters() → int¶: Returns the number of characters of text, before wordwrapping.

getCharacter(n: int) → int¶: Returns the character at the indicated position in the pre-wordwrapped string. If the object at this position is a graphic object instead of a character, returns 0.

getCharacter(r: int, c: int) → int: Returns the character at the indicated position in the indicated row. If the object at this position is a graphic object instead of a character, returns 0.

getGraphic(n: int) → TextGraphic¶

Returns the graphic object at the indicated position in the pre-wordwrapped string. If the object at this position is a character instead of a graphic object, returns NULL.

Return type: TextGraphic

getGraphic(r: int, c: int) → TextGraphic

Returns the graphic object at the indicated position in the indicated row. If the object at this position is a character instead of a graphic object, returns NULL.

Return type: TextGraphic

getWidth(n: int) → float¶: Returns the width of the character or object at the indicated position in the pre-wordwrapped string.

getWidth(r: int, c: int) → float: Returns the width of the character or object at the indicated position in the indicated row.

getNumRows() → int¶: Returns the number of rows of text after it has all been wordwrapped and assembled.

getNumCols(r: int) → int¶: Returns the number of characters and/or graphic objects in the nth row.

getXpos(r: int, c: int) → float¶

Returns the x position of the origin of the character or graphic object at the indicated position in the indicated row.

It is legal for c to exceed the index number of the last column by 1, and it is legal for r to exceed the index number of the last row by 1, if c is 0.

getYpos(r: int, c: int) → float¶

Returns the y position of the origin of all of the characters or graphic objects in the indicated row.

It is legal for r to exceed the index number of the last row by 1. The value of c is presently ignored.

assembleText() → PandaNode¶

Actually assembles all of the text into a GeomNode, and returns the node (or possibly a parent of the node, to keep the shadow separate). Once this has been called, you may query the extents of the text via getUl(), getLr().

Return type: PandaNode

getUl() → LVector2¶

Returns the upper-left corner of the assembled text, in 2-d text coordinates.

Return type: LVector2

getLr() → LVector2¶

Returns the lower-right corner of the assembled text, in 2-d text coordinates.

Return type: LVector2

static calcWidth(graphic: TextGraphic, properties: TextProperties) → float¶: Returns the width of a single TextGraphic image.

static calcWidth(character: int, properties: TextProperties) → float

Returns the width of a single character, according to its associated font. This also correctly calculates the width of cheesy ligatures and accented characters, which may not exist in the font as such.

This does not take kerning into account, however.

static hasExactCharacter(character: int, properties: TextProperties) → bool¶

Returns true if the named character exists in the font exactly as named, false otherwise. Note that because Panda can assemble glyphs together automatically using cheesy accent marks, this is not a reliable indicator of whether a suitable glyph can be rendered for the character. For that, use hasCharacter() instead.

This returns true for whitespace and Unicode whitespace characters (if they exist in the font), but returns false for characters that would render with the “invalid glyph”. It also returns false for characters that would be synthesized within Panda, but see hasCharacter().

static hasCharacter(character: int, properties: TextProperties) → bool¶

Returns true if the named character exists in the font or can be synthesized by Panda, false otherwise. (Panda can synthesize some accented characters by combining similar-looking glyphs from the font.)

This returns true for whitespace and Unicode whitespace characters (if they exist in the font), but returns false for characters that would render with the “invalid glyph”.

static isWhitespace(character: int, properties: TextProperties) → bool¶

Returns true if the indicated character represents whitespace in the font, or false if anything visible will be rendered for it.

This returns true for whitespace and Unicode whitespace characters (if they exist in the font), and returns false for any other characters, including characters that do not exist in the font (these would be rendered with the “invalid glyph”, which is visible).

Note that this function can be reliably used to identify Unicode whitespace characters only if the font has all of the whitespace characters defined. It will return false for any character not in the font, even if it is an official Unicode whitespace character.

property usage_hint¶

Getter: Returns the UsageHint that will be applied to generated geometry. See setUsageHint().
Setter: Specifies the UsageHint that will be applied to generated geometry. The default is UH_static, which is probably the right setting, but if you know the TextNode’s geometry will have a short lifespan, it may be better to set it to UH_stream. See geomEnums.h.

Return type: UsageHint

property max_rows¶

Getter

If max_rows is greater than zero, no more than max_rows will be accepted. Text beyond that will be truncated.

Setter

If max_rows is greater than zero, no more than max_rows will be accepted. Text beyond that will be truncated.

Setting this will not truncate text immediately. You must follow this up with a call to setWtext() to truncate the existing text.

Return type: int

property dynamic_merge¶

Getter: Returns the dynamic_merge flag. See TextNode.setFlattenFlags().
Setter: Sets the dynamic_merge flag. See TextNode.setFlattenFlags().

Return type: bool

property multiline_mode¶

Getter: Returns the multline_mode flag. See TextNode::set_multiline_mode().
Setter: Sets the multiline mode flag. Set the multiline mode to allow text to wrap. It defaults to true.

Return type: bool

property properties¶

Getter

Returns the default TextProperties that are applied to the text in the absence of any nested property change sequences.

Returns the TextProperties in effect for the object at the indicated position in the pre-wordwrapped string.

Returns the TextProperties in effect for the object at the indicated position in the indicated row.

Setter

Specifies the default TextProperties that are applied to the text in the absence of any nested property change sequences.

Return type: TextProperties