gda_data_proxy_new ()

GObject *
gda_data_proxy_new (GdaDataModel *model);

Creates a new proxy for model . For bindings use gda_data_proxy_new_with_data_model .

gda_data_proxy_get_proxied_model ()

GdaDataModel *
gda_data_proxy_get_proxied_model (GdaDataProxy *proxy);

Fetch the GdaDataModel which proxy does proxy

gda_data_proxy_get_proxied_model_n_cols ()

gint
gda_data_proxy_get_proxied_model_n_cols
                               (GdaDataProxy *proxy);

Get the number of columns in the proxied data model

gda_data_proxy_get_proxied_model_n_rows ()

gint
gda_data_proxy_get_proxied_model_n_rows
                               (GdaDataProxy *proxy);

Get the number of rows in the proxied data model

gda_data_proxy_is_read_only ()

gboolean
gda_data_proxy_is_read_only (GdaDataProxy *proxy);

gda_data_proxy_get_values ()

GSList *
gda_data_proxy_get_values (GdaDataProxy *proxy,
                           gint proxy_row,
                           gint *cols_index,
                           gint n_cols);

Retrieve a whole list of values from the proxy data model. This function calls gda_data_proxy_get_value() for each column index specified in cols_index , and generates a GSList on the way.

gda_data_proxy_get_value_attributes ()

GdaValueAttribute
gda_data_proxy_get_value_attributes (GdaDataProxy *proxy,
                                     gint proxy_row,
                                     gint col);

Get the attributes of the value stored at (proxy_row, col) in proxy , which is an ORed value of GdaValueAttribute flags

gda_data_proxy_alter_value_attributes ()

void
gda_data_proxy_alter_value_attributes (GdaDataProxy *proxy,
                                       gint proxy_row,
                                       gint col,
                                       GdaValueAttribute alter_flags);

Alters the attributes of the value stored at (proxy_row, col) in proxy . the alter_flags can only contain the GDA_VALUE_ATTR_IS_NULL, GDA_VALUE_ATTR_IS_DEFAULT and GDA_VALUE_ATTR_IS_UNCHANGED flags (other flags are ignored).

gda_data_proxy_get_proxied_model_row ()

gint
gda_data_proxy_get_proxied_model_row (GdaDataProxy *proxy,
                                      gint proxy_row);

Get the proxy 's proxied model row corresponding to proxy_row

gda_data_proxy_delete ()

void
gda_data_proxy_delete (GdaDataProxy *proxy,
                       gint proxy_row);

Marks the row proxy_row to be deleted

gda_data_proxy_undelete ()

void
gda_data_proxy_undelete (GdaDataProxy *proxy,
                         gint proxy_row);

Remove the "to be deleted" mark at the row proxy_row , if it existed.

gda_data_proxy_row_is_deleted ()

gboolean
gda_data_proxy_row_is_deleted (GdaDataProxy *proxy,
                               gint proxy_row);

Tells if the row number proxy_row is marked to be deleted.

gda_data_proxy_row_is_inserted ()

gboolean
gda_data_proxy_row_is_inserted (GdaDataProxy *proxy,
                                gint proxy_row);

Tells if the row number proxy_row is a row which has been inserted in proxy (and is thus not in the proxied data model).

gda_data_proxy_cancel_row_changes ()

void
gda_data_proxy_cancel_row_changes (GdaDataProxy *proxy,
                                   gint proxy_row,
                                   gint col);

Resets data at the corresponding row and column. If proxy_row corresponds to a new row, then that new row is deleted from proxy .

gda_data_proxy_apply_row_changes ()

gboolean
gda_data_proxy_apply_row_changes (GdaDataProxy *proxy,
                                  gint proxy_row,
                                  GError **error);

Commits the modified data in the proxy back into the GdaDataModel.

gda_data_proxy_has_changed ()

gboolean
gda_data_proxy_has_changed (GdaDataProxy *proxy);

Tells if proxy contains any modifications not applied to the proxied data model.

gda_data_proxy_row_has_changed ()

gboolean
gda_data_proxy_row_has_changed (GdaDataProxy *proxy,
                                gint proxy_row);

Tells if the row number proxy_row has changed

gda_data_proxy_get_n_new_rows ()

gint
gda_data_proxy_get_n_new_rows (GdaDataProxy *proxy);

Get the number of rows which have been added to proxy and which are not part of the proxied data model.

gda_data_proxy_set_sample_size ()

void
gda_data_proxy_set_sample_size (GdaDataProxy *proxy,
                                gint sample_size);

Sets the size of each chunk of data to display: the maximum number of rows which can be "displayed" at a time (the maximum number of rows which proxy pretends to have). The default value is arbitrary 300 as it is big enough to be able to display quite a lot of data, but small enough to avoid too much data displayed at the same time.

Note: the rows which have been added but not yet committed will always be displayed regardless of the current chunk of data, and the modified rows which are not visible when the displayed chunk of data changes are still held as modified rows.

To remove the chunking of the data to display, simply pass sample_size the 0 value.

gda_data_proxy_get_sample_size ()

gint
gda_data_proxy_get_sample_size (GdaDataProxy *proxy);

Get the size of each chunk of data displayed at a time.

gda_data_proxy_set_sample_start ()

void
gda_data_proxy_set_sample_start (GdaDataProxy *proxy,
                                 gint sample_start);

Sets the number of the first row to be available in proxy (in reference to the proxied data model)

gda_data_proxy_get_sample_start ()

gint
gda_data_proxy_get_sample_start (GdaDataProxy *proxy);

Get the number of the first row to be available in proxy (in reference to the proxied data model)

gda_data_proxy_get_sample_end ()

gint
gda_data_proxy_get_sample_end (GdaDataProxy *proxy);

Get the number of the last row to be available in proxy (in reference to the proxied data model)

gda_data_proxy_apply_all_changes ()

gboolean
gda_data_proxy_apply_all_changes (GdaDataProxy *proxy,
                                  GError **error);

Apply all the changes stored in the proxy to the proxied data model. The changes are done row after row, and if an error occurs, then it is possible that not all the changes to all the rows have been applied.

gda_data_proxy_cancel_all_changes ()

gboolean
gda_data_proxy_cancel_all_changes (GdaDataProxy *proxy);

Cancel all the changes stored in the proxy (the proxy will be reset to its state as it was just after creation). Note that if there are some cached changes (i.e. not applied to the current proxied data model), then these cached changes are not cleared (set the "cache-changes" property to FALSE for this).

gda_data_proxy_set_filter_expr ()

gboolean
gda_data_proxy_set_filter_expr (GdaDataProxy *proxy,
                                const gchar *filter_expr,
                                GError **error);

Sets a filter among the rows presented by proxy . The filter is defined by a filter expression which can be any SQL valid expression using proxy 's columns. For instance if proxy has the "id" and "name" columns, then a filter can be "length(name) < 5" to filter only the rows where the length of the name is strictly inferior to 5, or "id >= 1000 and id < 2000 order by name limit 50" to filter only the rows where the id is between 1000 and 2000, ordered by name and limited to 50 rows.

Note about column names: real column names can be used (double quoted if necessary), but columns can also be named "_<column number>" with column numbers starting at 1.

Note that any previous filter expression is replaced with the new filter_expr if no error occurs (if an error occurs, then any previous filter is left unchanged).

gda_data_proxy_get_filter_expr ()

const gchar *
gda_data_proxy_get_filter_expr (GdaDataProxy *proxy);

Get the current filter expression used by proxy .

gda_data_proxy_get_filtered_n_rows ()

gint
gda_data_proxy_get_filtered_n_rows (GdaDataProxy *proxy);

Get the total number of filtered rows in proxy if a filter has been applied. As new rows (rows added to the proxy and not yet added to the proxied data model) and rows to remove (rows marked for removal but not yet removed from the proxied data model) are also filtered, the returned number also contains references to new rows and rows to be removed.

GdaDataProxy

typedef struct _GdaDataProxy GdaDataProxy;

GdaDataProxyClass

typedef struct {
	GObjectClass            parent_class;

	void                 (* row_delete_changed)   (GdaDataProxy *proxy, gint row, gboolean to_be_deleted);

	void                 (* sample_size_changed)  (GdaDataProxy *proxy, gint sample_size);
	void                 (* sample_changed)       (GdaDataProxy *proxy, gint sample_start, gint sample_end);

	GError              *(* validate_row_changes) (GdaDataProxy *proxy, gint row, gint proxied_row);
	void                 (* row_changes_applied)  (GdaDataProxy *proxy, gint row, gint proxied_row);

	void                 (* filter_changed)       (GdaDataProxy *proxy);
} GdaDataProxyClass;

GdaDataProxyPrivate

typedef struct _GdaDataProxyPrivate GdaDataProxyPrivate;

The “cache-changes” property

  “cache-changes”            gboolean

Defines how changes kept in the data proxy are handled when the proxied data model is changed (using the "model" property). The default is to silently discard all the changes, but if this property is set to TRUE, then the changes are cached.

If set to TRUE, each cached change will be re-applied to a newly set proxied data model if the change's number of columns match the proxied data model's number of columns and based on:

Owner: GdaDataProxy

Flags: Read / Write

Default value: FALSE

Since: 5.2

The “defer-sync” property

  “defer-sync”               gboolean

Tells if changes to the sample of rows displayed is done in background in several steps or if it's done in one step.

Owner: GdaDataProxy

Flags: Read / Write

Default value: TRUE

The “model” property

  “model”                    GdaDataModel *

Proxied data model.

Owner: GdaDataProxy

Flags: Read / Write / Construct

The “prepend-null-entry” property

  “prepend-null-entry”       gboolean

Tells if a row composed of NULL values is inserted as the proxy's first row.

Owner: GdaDataProxy

Flags: Read / Write

Default value: FALSE

The “sample-size” property

  “sample-size”              int

Number of rows which the proxy will contain at any time, like a sliding window on the proxied data model.

Owner: GdaDataProxy

Flags: Read / Write / Construct

Allowed values: [0,2147483646]

Default value: 300

The “filter-changed” signal

void
user_function (GdaDataProxy *proxy,
               gpointer      user_data)

Gets emitted when proxy 's filter has been changed

Flags: Run First

The “row-changes-applied” signal

void
user_function (GdaDataProxy *proxy,
               int           row,
               int           proxied_row,
               gpointer      user_data)

Gets emitted when proxy has committed a row change to the proxied data model.

Flags: Run First

The “row-delete-changed” signal

void
user_function (GdaDataProxy *proxy,
               int           row,
               gboolean      to_be_deleted,
               gpointer      user_data)

Gets emitted whenever a row has been marked to be deleted, or has been unmarked to be deleted

Flags: Run First

The “sample-changed” signal

void
user_function (GdaDataProxy *proxy,
               int           sample_start,
               int           sample_end,
               gpointer      user_data)

Gets emitted whenever proxy 's sample size has been changed. sample_start and sample_end are in reference to the proxied data model.

Flags: Run First

The “sample-size-changed” signal

void
user_function (GdaDataProxy *proxy,
               int           sample_size,
               gpointer      user_data)

Gets emitted whenever proxy 's sample size has been changed

Flags: Run First

The “validate-row-changes” signal

GError*
user_function (GdaDataProxy *proxy,
               int           row,
               int           proxied_row,
               gpointer      user_data)

Gets emitted when proxy is about to commit a row change to the proxied data model. If any callback returns a non NULL value, then the change commit fails with the returned GError

Flags: Run Last