TextAssembler¶
from panda3d.core import TextAssembler
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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 theTextProperties
. However, user code may take advantage of it, if desired, for very low-level text operations.Inheritance diagram
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__init__
(copy: TextAssembler)¶
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__init__
(encoder: TextEncoder)
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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 viagetUl()
,getLr()
.
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assign
(copy: TextAssembler) → TextAssembler¶
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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).
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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.
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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).
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static
calcWidth
(graphic: TextGraphic, properties: TextProperties) → float¶ Returns the width of a single
TextGraphic
image.
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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.
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clear
() → None¶ Reinitializes the contents of the
TextAssembler
.
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property
dynamic_merge
→ bool¶ - Getter
Returns the dynamic_merge flag. See
TextNode.setFlattenFlags()
.- Setter
Sets the dynamic_merge flag. See
TextNode.setFlattenFlags()
.
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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.
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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.
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getDynamicMerge
() → bool¶ Returns the dynamic_merge flag. See
TextNode.setFlattenFlags()
.
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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.
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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.
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getMaxRows
() → int¶ If max_rows is greater than zero, no more than max_rows will be accepted. Text beyond that will be truncated.
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getNumRows
() → int¶ Returns the number of rows of text after it has all been wordwrapped and assembled.
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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).
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getProperties
() → TextProperties¶ Returns the default
TextProperties
that are applied to the text in the absence of any nested property change sequences.
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getProperties
(n: int) → TextProperties Returns the
TextProperties
in effect for the object at the indicated position in the pre-wordwrapped string.
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getProperties
(r: int, c: int) → TextProperties Returns the
TextProperties
in effect for the object at the indicated position in the indicated row.
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getUsageHint
() → UsageHint¶ Returns the UsageHint that will be applied to generated geometry. See
setUsageHint()
.
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getWidth
(n: int) → float¶ Returns the width of the character or object at the indicated position in the pre-wordwrapped string.
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getWidth
(r: int, c: int) → float Returns the width of the character or object at the indicated position in the indicated row.
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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).
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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.
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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.
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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.
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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.
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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”.
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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()
.
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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.
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property
max_rows
→ int¶ - 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.
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property
multiline_mode
→ bool¶ - 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.
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property
properties
→ TextProperties¶ - 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.
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setDynamicMerge
(dynamic_merge: bool) → None¶ Sets the dynamic_merge flag. See
TextNode.setFlattenFlags()
.
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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.
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setMultilineMode
(flag: bool) → None¶ Sets the multiline mode flag. Set the multiline mode to allow text to wrap. It defaults to true.
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setProperties
(properties: TextProperties) → None¶ Specifies the default
TextProperties
that are applied to the text in the absence of any nested property change sequences.
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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.
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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()
).
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setWtext
(wtext: str) → bool¶ Accepts a new text string and associated properties structure, and precomputes the wordwrapping layout appropriately. After this call,
getWordwrappedWtext()
andgetNumRows()
can be called.The return value is true if all the text is accepted, or false if some was truncated (see
setMaxRows()
).
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property
usage_hint
→ UsageHint¶ - 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.
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