GtkEntryBuffer

GtkEntryBuffer — Text buffer for GtkEntry

Properties

guint length Read
gint max-length Read / Write
gchar * text Read / Write

Types and Values

Object Hierarchy

    GObject
    ╰── GtkEntryBuffer

Includes

#include <gtk/gtk.h>

Description

The GtkEntryBuffer class contains the actual text displayed in a GtkEntry widget.

A single GtkEntryBuffer object can be shared by multiple GtkEntry widgets which will then share the same text content, but not the cursor position, visibility attributes, icon etc.

GtkEntryBuffer may be derived from. Such a derived class might allow text to be stored in an alternate location, such as non-pageable memory, useful in the case of important passwords. Or a derived class could integrate with an application’s concept of undo/redo.

Functions

gtk_entry_buffer_new ()

GtkEntryBuffer *
gtk_entry_buffer_new (const gchar *initial_chars,
                      gint n_initial_chars);

Create a new GtkEntryBuffer object.

Optionally, specify initial text to set in the buffer.

Parameters

initial_chars

initial buffer text, or NULL.

[allow-none]

n_initial_chars

number of characters in initial_chars , or -1

 

Returns

A new GtkEntryBuffer object.

Since: 2.18


gtk_entry_buffer_get_text ()

const gchar *
gtk_entry_buffer_get_text (GtkEntryBuffer *buffer);

Retrieves the contents of the buffer.

The memory pointer returned by this call will not change unless this object emits a signal, or is finalized.

Parameters

buffer

a GtkEntryBuffer

 

Returns

a pointer to the contents of the widget as a string. This string points to internally allocated storage in the buffer and must not be freed, modified or stored.

Since: 2.18


gtk_entry_buffer_set_text ()

void
gtk_entry_buffer_set_text (GtkEntryBuffer *buffer,
                           const gchar *chars,
                           gint n_chars);

Sets the text in the buffer.

This is roughly equivalent to calling gtk_entry_buffer_delete_text() and gtk_entry_buffer_insert_text().

Note that n_chars is in characters, not in bytes.

Parameters

buffer

a GtkEntryBuffer

 

chars

the new text

 

n_chars

the number of characters in text , or -1

 

Since: 2.18


gtk_entry_buffer_get_bytes ()

gsize
gtk_entry_buffer_get_bytes (GtkEntryBuffer *buffer);

Retrieves the length in bytes of the buffer. See gtk_entry_buffer_get_length().

Parameters

buffer

a GtkEntryBuffer

 

Returns

The byte length of the buffer.

Since: 2.18


gtk_entry_buffer_get_length ()

guint
gtk_entry_buffer_get_length (GtkEntryBuffer *buffer);

Retrieves the length in characters of the buffer.

Parameters

buffer

a GtkEntryBuffer

 

Returns

The number of characters in the buffer.

Since: 2.18


gtk_entry_buffer_get_max_length ()

gint
gtk_entry_buffer_get_max_length (GtkEntryBuffer *buffer);

Retrieves the maximum allowed length of the text in buffer . See gtk_entry_buffer_set_max_length().

Parameters

buffer

a GtkEntryBuffer

 

Returns

the maximum allowed number of characters in GtkEntryBuffer, or 0 if there is no maximum.

Since: 2.18


gtk_entry_buffer_set_max_length ()

void
gtk_entry_buffer_set_max_length (GtkEntryBuffer *buffer,
                                 gint max_length);

Sets the maximum allowed length of the contents of the buffer. If the current contents are longer than the given length, then they will be truncated to fit.

Parameters

buffer

a GtkEntryBuffer

 

max_length

the maximum length of the entry buffer, or 0 for no maximum. (other than the maximum length of entries.) The value passed in will be clamped to the range 0-65536.

 

Since: 2.18


gtk_entry_buffer_insert_text ()

guint
gtk_entry_buffer_insert_text (GtkEntryBuffer *buffer,
                              guint position,
                              const gchar *chars,
                              gint n_chars);

Inserts n_chars characters of chars into the contents of the buffer, at position position .

If n_chars is negative, then characters from chars will be inserted until a null-terminator is found. If position or n_chars are out of bounds, or the maximum buffer text length is exceeded, then they are coerced to sane values.

Note that the position and length are in characters, not in bytes.

Parameters

buffer

a GtkEntryBuffer

 

position

the position at which to insert text.

 

chars

the text to insert into the buffer.

 

n_chars

the length of the text in characters, or -1

 

Returns

The number of characters actually inserted.

Since: 2.18


gtk_entry_buffer_delete_text ()

guint
gtk_entry_buffer_delete_text (GtkEntryBuffer *buffer,
                              guint position,
                              gint n_chars);

Deletes a sequence of characters from the buffer. n_chars characters are deleted starting at position . If n_chars is negative, then all characters until the end of the text are deleted.

If position or n_chars are out of bounds, then they are coerced to sane values.

Note that the positions are specified in characters, not bytes.

Parameters

buffer

a GtkEntryBuffer

 

position

position at which to delete text

 

n_chars

number of characters to delete

 

Returns

The number of characters deleted.

Since: 2.18


gtk_entry_buffer_emit_deleted_text ()

void
gtk_entry_buffer_emit_deleted_text (GtkEntryBuffer *buffer,
                                    guint position,
                                    guint n_chars);

Used when subclassing GtkEntryBuffer

Parameters

buffer

a GtkEntryBuffer

 

position

position at which text was deleted

 

n_chars

number of characters deleted

 

Since: 2.18


gtk_entry_buffer_emit_inserted_text ()

void
gtk_entry_buffer_emit_inserted_text (GtkEntryBuffer *buffer,
                                     guint position,
                                     const gchar *chars,
                                     guint n_chars);

Used when subclassing GtkEntryBuffer

Parameters

buffer

a GtkEntryBuffer

 

position

position at which text was inserted

 

chars

text that was inserted

 

n_chars

number of characters inserted

 

Since: 2.18

Types and Values

struct GtkEntryBuffer

struct GtkEntryBuffer;

Property Details

The “length” property

  “length”                   guint

The length (in characters) of the text in buffer.

Flags: Read

Allowed values: <= 65535

Default value: 0

Since: 2.18


The “max-length” property

  “max-length”               gint

The maximum length (in characters) of the text in the buffer.

Flags: Read / Write

Allowed values: [0,65535]

Default value: 0

Since: 2.18


The “text” property

  “text”                     gchar *

The contents of the buffer.

Flags: Read / Write

Default value: ""

Since: 2.18

Signal Details

The “deleted-text” signal

void
user_function (GtkEntryBuffer *buffer,
               guint           position,
               guint           n_chars,
               gpointer        user_data)

This signal is emitted after text is deleted from the buffer.

Parameters

buffer

a GtkEntryBuffer

 

position

the position the text was deleted at.

 

n_chars

The number of characters that were deleted.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First

Since: 2.18


The “inserted-text” signal

void
user_function (GtkEntryBuffer *buffer,
               guint           position,
               gchar          *chars,
               guint           n_chars,
               gpointer        user_data)

This signal is emitted after text is inserted into the buffer.

Parameters

buffer

a GtkEntryBuffer

 

position

the position the text was inserted at.

 

chars

The text that was inserted.

 

n_chars

The number of characters that were inserted.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First

Since: 2.18