Pango::Layout Class Reference

Detailed Description
A Pango::Layout represents an entire paragraph of text.It is initialized with a Pango::Context, UTF-8 string and set of attributes for that string. Once that is done, the set of formatted lines can be extracted from the object, the layout can be rendered, and conversion between logical character positions within the layout's text, and the physical position of the resulting glyphs can be made.
Public Member Functions | |
void | add_to_cairo_context (const Cairo::RefPtr<Cairo::Context>& context) |
Adds the text in this LayoutLine to the current path in the specified Cairo context. | |
void | context_changed () |
Forces recomputation of any state in the Pango::Layout that might depend on the layout's context. | |
Glib::RefPtr<Layout> | copy () |
Does a deep copy-by-value of the src layout. | |
Alignment | get_alignment () const |
Gets the alignment for the layout: how partial lines are positioned within the horizontal space available. | |
AttrList | get_attributes () const |
Gets the attribute list for the layout, if any. | |
bool | get_auto_dir () const |
Gets whether to calculate the bidirectional base direction for the layout according to the contents of the layout. | |
Glib::RefPtr<Context> | get_context () const |
Retrieves the Pango::Context used for this layout. | |
void | get_cursor_pos (int index, Rectangle& strong_pos, Rectangle& weak_pos) const |
Given an index within a layout, determines the positions that of the strong and weak cursors if the insertion point is at that index. | |
Rectangle | get_cursor_strong_pos (int index) const |
Given an index within the layout, determine the positions that of the strong cursors if the insertion point is at that index. | |
Rectangle | get_cursor_weak_pos (int index) const |
Given an index within the layout, determine the positions that of the weak cursors if the insertion point is at that index. | |
EllipsizeMode | get_ellipsize () const |
Gets the type of ellipsization being performed for layout. | |
void | get_extents (Rectangle& ink_rect, Rectangle& logical_rect) const |
Compute the logical and ink extents of layout. | |
FontDescription | get_font_description () const |
Gets the font description for the layout, if any. | |
int | get_indent () const |
Gets the paragraph indent width in Pango units. | |
Rectangle | get_ink_extents () const |
Compute the ink extents of layout. | |
void | get_iter (LayoutIter& iter) |
Gets an iterator to iterate over the visual extents of the layout. | |
bool | get_justify () const |
Gets whether each complete line should be stretched to fill the entire width of the layout. | |
Glib::RefPtr<const LayoutLine> | get_line (int line) const |
Retrieves a particular line from a Pango::Layout. | |
Glib::RefPtr<LayoutLine> | get_line (int line) |
Retrieves a particular line from a Pango::Layout. | |
int | get_line_count () const |
Retrieves the count of lines for the layout. | |
SListHandle_ConstLayoutLine | get_lines () const |
Return value: a SList containing the lines in the layout. | |
SListHandle_LayoutLine | get_lines () |
Return value: a SList containing the lines in the layout. | |
Glib::ArrayHandle<LogAttr> | get_log_attrs () const |
Retrieve an array of logical attributes for each character in the layout. | |
Rectangle | get_logical_extents () const |
Compute the logical extents of layout. | |
void | get_pixel_extents (Rectangle& ink_rect, Rectangle& logical_rect) const |
Compute the logical and ink extents of layout in device units. | |
Rectangle | get_pixel_ink_extents () const |
Compute the ink extents of the layout in device units. | |
Rectangle | get_pixel_logical_extents () const |
Compute the logical extents of the layout in device units. | |
void | get_pixel_size (int& width, int& height) const |
Determines the logical width and height of a Pango::Layout in device units. | |
bool | get_single_paragraph_mode () const |
Obtains the value set by pango_layout_set_single_paragraph_mode(). | |
void | get_size (int& width, int& height) const |
Determines the logical width and height of a Pango::Layout in Pango units (device units scaled by Pango::SCALE). | |
int | get_spacing () const |
Gets the amount of spacing in Pango::GlyphUnit between the lines of the layout. | |
TabArray | get_tabs () const |
Get the current Pango::TabArray used by this layout. | |
Glib::ustring | get_text () const |
Gets the text in the layout. | |
int | get_unknown_glyphs_count () const |
Counts the number unknown glyphs in layout. | |
int | get_width () const |
Gets the width to which the lines of the Pango::Layout should wrap. | |
WrapMode | get_wrap () const |
Gets the wrap mode for the layout. | |
const PangoLayout* | gobj () const |
Provides access to the underlying C GObject. | |
PangoLayout* | gobj () |
Provides access to the underlying C GObject. | |
PangoLayout* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. | |
void | index_to_line_x (int index_, bool trailing, int& line, int& x_pos) const |
Converts from byte index within the layout to line and X position. | |
Rectangle | index_to_pos (int index) const |
Convert from an index within the layout to the onscreen position corresponding to the grapheme at that index, which is represented as rectangle. | |
bool | is_ellipsized () const |
Queries whether the layout had to ellipsize any paragraphs. | |
bool | is_wrapped () const |
Queries whether the layout had to wrap any paragraphs. | |
void | move_cursor_visually (bool strong, int old_index, int old_trailing, int direction, int& new_index, int& new_trailing) const |
Computes a new cursor position from an old position and a count of positions to move visually. | |
void | set_alignment (Alignment alignment) |
Sets the alignment for the layout: how partial lines are positioned within the horizontal space available. | |
void | set_attributes (AttrList& attrs) |
Sets the text attributes for a layout object. | |
void | set_auto_dir (bool auto_dir=true) |
Sets whether to calculate the bidirectional base direction for the layout according to the contents of the layout; when this flag is on (the default), then paragraphs in layout that begin with strong right-to-left characters (Arabic and Hebrew principally), will have right-to-left layout, paragraphs with letters from other scripts will have left-to-right layout. | |
void | set_ellipsize (EllipsizeMode ellipsize) |
Sets the type of ellipsization being performed for layout. | |
void | set_font_description (const FontDescription& desc) |
Set the default font description for the layout. | |
void | set_indent (int indent) |
Sets the width in Pango units to indent each paragraph. | |
void | set_justify (bool justify=true) |
Sets whether each complete line should be stretched to fill the entire width of the layout. | |
void | set_markup (const Glib::ustring& markup, gunichar accel_marker, gunichar& accel_char) |
Sets the layout text and attribute list from marked-up text (see markup format). | |
void | set_markup (const Glib::ustring& markup) |
Sets the layout text and attribute list from marked-up text (see markup format). | |
void | set_single_paragraph_mode (bool setting=true) |
If setting is true , do not treat newlines and similar characters as paragraph separators; instead, keep all text in a single paragraph, and display a glyph for paragraph separator characters. | |
void | set_spacing (int spacing) |
Sets the amount of spacing in Pango::GlyphUnit between the lines of the layout. | |
void | set_tabs (TabArray& tabs) |
Sets the tabs to use for layout, overriding the default tabs (by default, tabs are every 8 spaces). | |
void | set_text (const Glib::ustring& text) |
Set the text of the layout. | |
void | set_width (int width) |
Sets the width to which the lines of the Pango::Layout should wrap. | |
void | set_wrap (WrapMode wrap) |
Sets the wrap mode; the wrap mode only has effect if a width is set on the layout with pango_layout_set_width(). | |
void | unset_font_description () |
void | update_from_cairo_context (const Cairo::RefPtr<Cairo::Context>& context) |
Updates the private Pango Context of a Pango Layout created with create(const Cairo::RefPtr<Cairo::Context>&) to match the current transformation and target surface of a Cairo Context. | |
bool | xy_to_index (int x, int y, int& index, int& trailing) const |
Converts from X and Y position within a layout to the byte index to the character at that logical position. | |
virtual | ~Layout () |
Static Public Member Functions | |
static Glib::RefPtr<Layout> | create (const Cairo::RefPtr<Cairo::Context>& context) |
Creates a layout object set up to match the current transformation and target surface of the Cairo context. | |
static Glib::RefPtr<Layout> | create (const Glib::RefPtr<Context>& context) |
Protected Member Functions | |
Layout (const Glib::RefPtr<Context>& context) | |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr<Pango::Layout> | wrap (PangoLayout* object, bool take_copy=false) |
A Glib::wrap() method for this object. |
Constructor & Destructor Documentation
virtual Pango::Layout::~Layout | ( | ) | [virtual] |
Pango::Layout::Layout | ( | const Glib::RefPtr<Context>& | context | ) | [explicit, protected] |
Member Function Documentation
void Pango::Layout::add_to_cairo_context | ( | const Cairo::RefPtr< Cairo::Context > & | context | ) |
Adds the text in this LayoutLine to the current path in the specified Cairo context.
The origin of the glyphs (the left edge of the line) will be at the current point of the cairo context.
- Parameters:
-
context A Cairo context.
void Pango::Layout::context_changed | ( | ) |
Forces recomputation of any state in the Pango::Layout that might depend on the layout's context.
This function should be called if you make changes to the context subsequent to creating the layout.
Glib::RefPtr<Layout> Pango::Layout::copy | ( | ) |
Does a deep copy-by-value of the src layout.
The attribute list, tab array, and text from the original layout are all copied by value.
- Returns:
- The newly allocated Pango::Layout, with a reference count of one, which should be freed with Glib::object_unref().
static Glib::RefPtr<Layout> Pango::Layout::create | ( | const Cairo::RefPtr< Cairo::Context > & | context | ) | [static] |
Creates a layout object set up to match the current transformation and target surface of the Cairo context.
This layout can then be used for text measurement with functions like get_size() or drawing with methods like show_in_cairo_contet(). If you change the transformation or target surface for context, you need to call update_from_cairo_context()
This is the most convenient way to use Cairo with Pango. However it is slightly inefficient since it creates a separate Pango Context object for each layout. This might matter in an application that is laying out large amounts of text.
- Parameters:
-
context A Cairo context.
static Glib::RefPtr<Layout> Pango::Layout::create | ( | const Glib::RefPtr<Context>& | context | ) | [static] |
Alignment Pango::Layout::get_alignment | ( | ) | const |
Gets the alignment for the layout: how partial lines are positioned within the horizontal space available.
- Returns:
- The alignment.
AttrList Pango::Layout::get_attributes | ( | ) | const |
bool Pango::Layout::get_auto_dir | ( | ) | const |
Gets whether to calculate the bidirectional base direction for the layout according to the contents of the layout.
See pango_layout_set_auto_dir().
- Returns:
true
if the bidirectional base direction is computed from the layout's contents,false
otherwise.
Glib::RefPtr<Context> Pango::Layout::get_context | ( | ) | const |
Retrieves the Pango::Context used for this layout.
- Returns:
- The Pango::Context for the layout. This does not have an additional refcount added, so if you want to keep a copy of this around, you must reference it yourself.
Given an index within a layout, determines the positions that of the strong and weak cursors if the insertion point is at that index.
The position of each cursor is stored as a zero-width rectangle. The strong cursor location is the location where characters of the directionality equal to the base direction of the layout are inserted. The weak cursor location is the location where characters of the directionality opposite to the base direction of the layout are inserted.
- Parameters:
-
index The byte index of the cursor. strong_pos Location to store the strong cursor position (may be 0
).weak_pos Location to store the weak cursor position (may be 0
).
Rectangle Pango::Layout::get_cursor_strong_pos | ( | int | index | ) | const |
Given an index within the layout, determine the positions that of the strong cursors if the insertion point is at that index.
- Parameters:
-
index The byte index of the cursor.
- Returns:
- The strong cursor position.
Rectangle Pango::Layout::get_cursor_weak_pos | ( | int | index | ) | const |
Given an index within the layout, determine the positions that of the weak cursors if the insertion point is at that index.
- Parameters:
-
index The byte index of the cursor.
- Returns:
- The weak cursor position.
EllipsizeMode Pango::Layout::get_ellipsize | ( | ) | const |
Gets the type of ellipsization being performed for layout.
See pango_layout_set_ellipsize()
- Returns:
- The current ellipsization mode for layout.
Since: 1.6.
Compute the logical and ink extents of layout.
Logical extents are usually what you want for positioning things. The extents are given in layout coordinates; layout coordinates begin at the top left corner of the layout.
FontDescription Pango::Layout::get_font_description | ( | ) | const |
Gets the font description for the layout, if any.
- Returns:
- A pointer to the layout's font description, or
0
if the font description from the layout's context is inherited. This value is owned by the layout and must not be modified or freed.
int Pango::Layout::get_indent | ( | ) | const |
Gets the paragraph indent width in Pango units.
A negative value indicates a hanging indentation.
- Returns:
- The indent.
Rectangle Pango::Layout::get_ink_extents | ( | ) | const |
Compute the ink extents of layout.
- Returns:
- The extents of the layout as drawn.
void Pango::Layout::get_iter | ( | LayoutIter& | iter | ) |
Gets an iterator to iterate over the visual extents of the layout.
- Parameters:
-
iter Location to store the iterator.
bool Pango::Layout::get_justify | ( | ) | const |
Gets whether each complete line should be stretched to fill the entire width of the layout.
- Returns:
- The justify.
Glib::RefPtr<const LayoutLine> Pango::Layout::get_line | ( | int | line | ) | const |
Retrieves a particular line from a Pango::Layout.
This is a faster alternative to pango_layout_get_line(), but the user is not expected to modify the contents of the line (glyphs, glyph widths, etc.).
- Parameters:
-
line The index of a line, which must be between 0 and pango_layout_get_line_count(layout) - 1
, inclusive.
- Returns:
- The requested Pango::LayoutLine, or
0
if the index is out of range. This layout line can be ref'ed and retained, but will become invalid if changes are made to the Pango::Layout. No changes should be made to the line.
Glib::RefPtr<LayoutLine> Pango::Layout::get_line | ( | int | line | ) |
Retrieves a particular line from a Pango::Layout.
Use the faster pango_layout_get_line_readonly() if you do not plan to modify the contents of the line (glyphs, glyph widths, etc.).
- Parameters:
-
line The index of a line, which must be between 0 and pango_layout_get_line_count(layout) - 1
, inclusive.
- Returns:
- The requested Pango::LayoutLine, or
0
if the index is out of range. This layout line can be ref'ed and retained, but will become invalid if changes are made to the Pango::Layout.
int Pango::Layout::get_line_count | ( | ) | const |
Retrieves the count of lines for the layout.
- Returns:
- The line count.
SListHandle_ConstLayoutLine Pango::Layout::get_lines | ( | ) | const |
Return value: a SList containing the lines in the layout.
This
- Returns:
- A SList containing the lines in the layout. This points to internal data of the Pango::Layout and must be used with care. It will become invalid on any change to the layout's text or properties. No changes should be made to the lines.
SListHandle_LayoutLine Pango::Layout::get_lines | ( | ) |
Return value: a SList containing the lines in the layout.
This
- Returns:
- A SList containing the lines in the layout. This points to internal data of the Pango::Layout and must be used with care. It will become invalid on any change to the layout's text or properties.
Glib::ArrayHandle<LogAttr> Pango::Layout::get_log_attrs | ( | ) | const |
Retrieve an array of logical attributes for each character in the layout.
- Returns:
- An array of logical attributes.
Rectangle Pango::Layout::get_logical_extents | ( | ) | const |
Compute the logical extents of layout.
- Returns:
- The logical extents of the layout.
Compute the logical and ink extents of layout in device units.
See pango_layout_get_extents(); this function just calls pango_layout_get_extents() and then converts the extents to pixels using the Pango::SCALE factor.
Rectangle Pango::Layout::get_pixel_ink_extents | ( | ) | const |
Compute the ink extents of the layout in device units.
- Returns:
- The extents of the layout as drawn.
Rectangle Pango::Layout::get_pixel_logical_extents | ( | ) | const |
Compute the logical extents of the layout in device units.
- Returns:
- The logical extents of the layout.
void Pango::Layout::get_pixel_size | ( | int & | width, | |
int & | height | |||
) | const |
Determines the logical width and height of a Pango::Layout in device units.
(pango_layout_get_size() returns the width and height scaled by Pango::SCALE.) This is simply a convenience function around pango_layout_get_pixel_extents().
- Parameters:
-
width Location to store the logical width, or 0
.height Location to store the logical height, or 0
.
bool Pango::Layout::get_single_paragraph_mode | ( | ) | const |
Obtains the value set by pango_layout_set_single_paragraph_mode().
- Returns:
true
if the layout does not break paragraphs at paragraph separator characters,false
otherwise.
void Pango::Layout::get_size | ( | int & | width, | |
int & | height | |||
) | const |
Determines the logical width and height of a Pango::Layout in Pango units (device units scaled by Pango::SCALE).
This is simply a convenience function around pango_layout_get_extents().
- Parameters:
-
width Location to store the logical width, or 0
.height Location to store the logical height, or 0
.
int Pango::Layout::get_spacing | ( | ) | const |
Gets the amount of spacing in Pango::GlyphUnit between the lines of the layout.
- Returns:
- The spacing.
TabArray Pango::Layout::get_tabs | ( | ) | const |
Get the current Pango::TabArray used by this layout.
If no Pango::TabArray has been set, then the default tabs are in use and an invalid instance is returned. Default tabs are every 8 spaces.
- Returns:
- A copy of the tabs for this layout.
Glib::ustring Pango::Layout::get_text | ( | ) | const |
Gets the text in the layout.
The returned text should not be freed or modified.
- Returns:
- The text in the layout.
int Pango::Layout::get_unknown_glyphs_count | ( | ) | const |
Counts the number unknown glyphs in layout.
That is, zero if glyphs for all characters in the layout text were found, or more than zero otherwise.
- Returns:
- The number of unknown glyphs in layout.
int Pango::Layout::get_width | ( | ) | const |
Gets the width to which the lines of the Pango::Layout should wrap.
- Returns:
- The width, or -1 if no width set.
WrapMode Pango::Layout::get_wrap | ( | ) | const |
Gets the wrap mode for the layout.
Use pango_layout_is_wrapped() to query whether any paragraphs were actually wrapped.
- Returns:
- Active wrap mode.
const PangoLayout* Pango::Layout::gobj | ( | ) | const [inline] |
PangoLayout* Pango::Layout::gobj | ( | ) | [inline] |
PangoLayout* Pango::Layout::gobj_copy | ( | ) |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
void Pango::Layout::index_to_line_x | ( | int | index_, | |
bool | trailing, | |||
int & | line, | |||
int & | x_pos | |||
) | const |
Converts from byte index within the layout to line and X position.
(X position is measured from the left edge of the line)
- Parameters:
-
index The byte index of a grapheme within the layout. trailing An integer indicating the edge of the grapheme to retrieve the position of. If 0, the trailing edge of the grapheme, if > 0, the leading of the grapheme. line Location to store resulting line index. (which will between 0 and pango_layout_get_line_count(layout) - 1). x_pos Location to store resulting position within line (Pango::SCALE units per device unit).
Rectangle Pango::Layout::index_to_pos | ( | int | index | ) | const |
Convert from an index within the layout to the onscreen position corresponding to the grapheme at that index, which is represented as rectangle.
Note that x in the returned rectangle is always the leading edge of the grapheme and x + width the trailing edge of the grapheme. If the directionality of the grapheme is right-to-left, then width will be negative.
- Parameters:
-
index Byte index within layout.
- Returns:
- The position of the grapheme.
bool Pango::Layout::is_ellipsized | ( | ) | const |
Queries whether the layout had to ellipsize any paragraphs.
This returns true
if the ellipsization mode for layout is not Pango::ELLIPSIZE_NONE, a positive width is set on layout, and there are paragraphs exceeding that width that have to be ellipsized.
- Returns:
true
if any paragraphs had to be ellipsized,false
otherwise.
bool Pango::Layout::is_wrapped | ( | ) | const |
Queries whether the layout had to wrap any paragraphs.
This returns true
if a positive width is set on layout, ellipsization mode of layout is set to Pango::ELLIPSIZE_NONE, and there are paragraphs exceeding the layout width that have to be wrapped.
- Returns:
true
if any paragraphs had to be wrapped,false
otherwise.
void Pango::Layout::move_cursor_visually | ( | bool | strong, | |
int | old_index, | |||
int | old_trailing, | |||
int | direction, | |||
int & | new_index, | |||
int & | new_trailing | |||
) | const |
Computes a new cursor position from an old position and a count of positions to move visually.
If direction is positive, then the new strong cursor position will be one position to the right of the old cursor position. If direction is negative, then the new strong cursor position will be one position to the left of the old cursor position.
In the presence of bidirectional text, the correspondence between logical and visual order will depend on the direction of the current run, and there may be jumps when the cursor is moved off of the end of a run.
Motion here is in cursor positions, not in characters, so a single call to pango_layout_move_cursor_visually() may move the cursor over multiple characters when multiple characters combine to form a single grapheme.
- Parameters:
-
strong Whether the moving cursor is the strong cursor or the weak cursor. The strong cursor is the cursor corresponding to text insertion in the base direction for the layout. old_index The byte index of the grapheme for the old index. old_trailing If 0, the cursor was at the trailing edge of the grapheme indicated by old_index, if > 0, the cursor was at the leading edge. direction Direction to move cursor. A negative value indicates motion to the left. new_index Location to store the new cursor byte index. A value of -1 indicates that the cursor has been moved off the beginning of the layout. A value of MAXINT indicates that the cursor has been moved off the end of the layout. new_trailing Number of characters to move forward from the location returned for new_index to get the position where the cursor should be displayed. This allows distinguishing the position at the beginning of one line from the position at the end of the preceding line. new_index is always on the line where the cursor should be displayed.
void Pango::Layout::set_alignment | ( | Alignment | alignment | ) |
Sets the alignment for the layout: how partial lines are positioned within the horizontal space available.
- Parameters:
-
alignment The alignment.
void Pango::Layout::set_attributes | ( | AttrList& | attrs | ) |
Sets the text attributes for a layout object.
References attrs, so the caller can unref its reference.
- Parameters:
-
attrs A Pango::AttrList.
void Pango::Layout::set_auto_dir | ( | bool | auto_dir = true |
) |
Sets whether to calculate the bidirectional base direction for the layout according to the contents of the layout; when this flag is on (the default), then paragraphs in layout that begin with strong right-to-left characters (Arabic and Hebrew principally), will have right-to-left layout, paragraphs with letters from other scripts will have left-to-right layout.
Paragraphs with only neutral characters get their direction from the surrounding paragraphs.
When false
, the choice between left-to-right and right-to-left layout is done according to the base direction of the layout's Pango::Context. (See pango_context_set_base_dir()).
When the auto-computed direction of a paragraph differs from the base direction of the context, the interpretation of Pango::ALIGN_LEFT and Pango::ALIGN_RIGHT are swapped.
Since: 1.4
- Parameters:
-
auto_dir If true
, compute the bidirectional base direction from the layout's contents.
void Pango::Layout::set_ellipsize | ( | EllipsizeMode | ellipsize | ) |
Sets the type of ellipsization being performed for layout.
Depending on the ellipsization mode ellipsize text is removed from the start, middle, or end of lines so they fit within the width of layout set with pango_layout_set_width().
If the layout contains characters such as newlines that force it to be layed out in multiple lines, then each line is ellipsized separately.
Since: 1.6
- Parameters:
-
ellipsize The new ellipsization mode for layout.
void Pango::Layout::set_font_description | ( | const FontDescription& | desc | ) |
Set the default font description for the layout.
If no font description is set on the layout, the font description from the layout's context is used.
- Parameters:
-
desc The new pango font description.
void Pango::Layout::set_indent | ( | int | indent | ) |
Sets the width in Pango units to indent each paragraph.
A negative value of indent will produce a hanging indentation. That is, the first line will have the full width, and subsequent lines will be indented by the absolute value of indent.
- Parameters:
-
indent The amount by which to indent.
void Pango::Layout::set_justify | ( | bool | justify = true |
) |
Sets whether each complete line should be stretched to fill the entire width of the layout.
This stretching is typically done by adding whitespace, but for some scripts (such as Arabic), the justification may be done in more complex ways, like extending the characters.
Note that this setting is not implemented and so is ignored in Pango older than 1.18.
- Parameters:
-
justify Whether the lines in the layout should be justified.
void Pango::Layout::set_markup | ( | const Glib::ustring & | markup, | |
gunichar | accel_marker, | |||
gunichar & | accel_char | |||
) |
Sets the layout text and attribute list from marked-up text (see markup format).
Replaces the current text and attribute list.
If accel_marker is nonzero, the given character will mark the character following it as an accelerator. For example, the accel marker might be an ampersand or underscore. All characters marked as an accelerator will receive a Pango::UNDERLINE_LOW attribute, and the first character so marked will be returned in accel_char. Two accel_marker characters following each other produce a single literal accel_marker character.
- Parameters:
-
markup Some marked-up text. accel_marker Marker for accelerators in the text. accel_char Return location for any located accelerators.
void Pango::Layout::set_markup | ( | const Glib::ustring & | markup | ) |
Sets the layout text and attribute list from marked-up text (see markup format).
Replaces the current text and attribute list.
- Parameters:
-
markup Some marked-up text.
void Pango::Layout::set_single_paragraph_mode | ( | bool | setting = true |
) |
If setting is true
, do not treat newlines and similar characters as paragraph separators; instead, keep all text in a single paragraph, and display a glyph for paragraph separator characters.
Used when you want to allow editing of newlines on a single text line.
- Parameters:
-
setting New setting.
void Pango::Layout::set_spacing | ( | int | spacing | ) |
Sets the amount of spacing in Pango::GlyphUnit between the lines of the layout.
- Parameters:
-
spacing The amount of spacing.
void Pango::Layout::set_tabs | ( | TabArray& | tabs | ) |
Sets the tabs to use for layout, overriding the default tabs (by default, tabs are every 8 spaces).
If tabs is 0
, the default tabs are reinstated. tabs is copied into the layout; you must free your copy of tabs yourself.
- Parameters:
-
tabs A Pango::TabArray.
void Pango::Layout::set_text | ( | const Glib::ustring & | text | ) |
Set the text of the layout.
- Parameters:
-
text The text for the layout.
void Pango::Layout::set_width | ( | int | width | ) |
Sets the width to which the lines of the Pango::Layout should wrap.
- Parameters:
-
width The desired width in Pango units, or -1 to indicate that no wrapping should be performed.
void Pango::Layout::set_wrap | ( | WrapMode | wrap | ) |
Sets the wrap mode; the wrap mode only has effect if a width is set on the layout with pango_layout_set_width().
To turn off wrapping, set the width to -1.
- Parameters:
-
wrap The wrap mode.
void Pango::Layout::unset_font_description | ( | ) |
void Pango::Layout::update_from_cairo_context | ( | const Cairo::RefPtr< Cairo::Context > & | context | ) |
bool Pango::Layout::xy_to_index | ( | int | x, | |
int | y, | |||
int & | index, | |||
int & | trailing | |||
) | const |
Converts from X and Y position within a layout to the byte index to the character at that logical position.
If the Y position is not inside the layout, the closest position is chosen (the position will be clamped inside the layout). If the X position is not within the layout, then the start or the end of the line is chosen as described for pango_layout_x_to_index(). If either the X or Y positions were not inside the layout, then the function returns false
; on an exact hit, it returns true
.
- Parameters:
-
x The X offset (in Pango::GlyphUnit) from the left edge of the layout. y The Y offset (in Pango::GlyphUnit) from the top edge of the layout. index Location to store calculated byte index. trailing Location to store a integer indicating where in the grapheme the user clicked. It will either be zero, or the number of characters in the grapheme. 0 represents the trailing edge of the grapheme.
- Returns:
true
if the coordinates were inside text,false
otherwise.
Friends And Related Function Documentation
Glib::RefPtr<Pango::Layout> wrap | ( | PangoLayout * | object, | |
bool | take_copy = false | |||
) | [related] |
A Glib::wrap() method for this object.
- Parameters:
-
object The C instance. take_copy False if the result should take ownership of the C instance. True if it should take a new copy or ref.
- Returns:
- A C++ instance that wraps this C instance.
The documentation for this class was generated from the following file: