gtk/auto/

cell_layout.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use crate::{CellArea, CellRenderer, TreeIter, TreeModel, ffi};
use glib::{prelude::*, translate::*};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// [`CellLayout`][crate::CellLayout] is an interface to be implemented by all objects which
    /// want to provide a [`TreeViewColumn`][crate::TreeViewColumn] like API for packing cells,
    /// setting attributes and data funcs.
    ///
    /// One of the notable features provided by implementations of
    /// GtkCellLayout are attributes. Attributes let you set the properties
    /// in flexible ways. They can just be set to constant values like regular
    /// properties. But they can also be mapped to a column of the underlying
    /// tree model with `gtk_cell_layout_set_attributes()`, which means that the value
    /// of the attribute can change from cell to cell as they are rendered by
    /// the cell renderer. Finally, it is possible to specify a function with
    /// [`CellLayoutExt::set_cell_data_func()`][crate::prelude::CellLayoutExt::set_cell_data_func()] that is called to determine the
    /// value of the attribute for each cell that is rendered.
    ///
    /// # GtkCellLayouts as GtkBuildable
    ///
    /// Implementations of GtkCellLayout which also implement the GtkBuildable
    /// interface ([`CellView`][crate::CellView], [`IconView`][crate::IconView], [`ComboBox`][crate::ComboBox],
    /// [`EntryCompletion`][crate::EntryCompletion], [`TreeViewColumn`][crate::TreeViewColumn]) accept GtkCellRenderer objects
    /// as ``<child>`` elements in UI definitions. They support a custom ``<attributes>``
    /// element for their children, which can contain multiple ``<attribute>``
    /// elements. Each ``<attribute>`` element has a name attribute which specifies
    /// a property of the cell renderer; the content of the element is the
    /// attribute value.
    ///
    /// This is an example of a UI definition fragment specifying attributes:
    ///
    ///
    ///
    /// **⚠️ The following code is in xml ⚠️**
    ///
    /// ```xml
    /// <object class="GtkCellView">
    ///   <child>
    ///     <object class="GtkCellRendererText"/>
    ///     <attributes>
    ///       <attribute name="text">0</attribute>
    ///     </attributes>
    ///   </child>
    /// </object>
    /// ```
    ///
    /// Furthermore for implementations of GtkCellLayout that use a [`CellArea`][crate::CellArea]
    /// to lay out cells (all GtkCellLayouts in GTK+ use a GtkCellArea)
    /// [cell properties][cell-properties] can also be defined in the format by
    /// specifying the custom ``<cell-packing>`` attribute which can contain multiple
    /// ``<property>`` elements defined in the normal way.
    ///
    /// Here is a UI definition fragment specifying cell properties:
    ///
    ///
    ///
    /// **⚠️ The following code is in xml ⚠️**
    ///
    /// ```xml
    /// <object class="GtkTreeViewColumn">
    ///   <child>
    ///     <object class="GtkCellRendererText"/>
    ///     <cell-packing>
    ///       <property name="align">True</property>
    ///       <property name="expand">False</property>
    ///     </cell-packing>
    ///   </child>
    /// </object>
    /// ```
    ///
    /// # Subclassing GtkCellLayout implementations
    ///
    /// When subclassing a widget that implements [`CellLayout`][crate::CellLayout] like
    /// [`IconView`][crate::IconView] or [`ComboBox`][crate::ComboBox], there are some considerations related
    /// to the fact that these widgets internally use a [`CellArea`][crate::CellArea].
    /// The cell area is exposed as a construct-only property by these
    /// widgets. This means that it is possible to e.g. do
    ///
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// combo = g_object_new (GTK_TYPE_COMBO_BOX, "cell-area", my_cell_area, NULL);
    /// ```
    ///
    /// to use a custom cell area with a combo box. But construct properties
    /// are only initialized after instance `init()`
    /// functions have run, which means that using functions which rely on
    /// the existence of the cell area in your subclass’ `init()` function will
    /// cause the default cell area to be instantiated. In this case, a provided
    /// construct property value will be ignored (with a warning, to alert
    /// you to the problem).
    ///
    ///
    ///
    /// **⚠️ The following code is in C ⚠️**
    ///
    /// ```C
    /// static void
    /// my_combo_box_init (MyComboBox *b)
    /// {
    ///   GtkCellRenderer *cell;
    ///
    ///   cell = gtk_cell_renderer_pixbuf_new ();
    ///   // The following call causes the default cell area for combo boxes,
    ///   // a GtkCellAreaBox, to be instantiated
    ///   gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (b), cell, FALSE);
    ///   ...
    /// }
    ///
    /// GtkWidget *
    /// my_combo_box_new (GtkCellArea *area)
    /// {
    ///   // This call is going to cause a warning about area being ignored
    ///   return g_object_new (MY_TYPE_COMBO_BOX, "cell-area", area, NULL);
    /// }
    /// ```
    ///
    /// If supporting alternative cell areas with your derived widget is
    /// not important, then this does not have to concern you. If you want
    /// to support alternative cell areas, you can do so by moving the
    /// problematic calls out of `init()` and into a `constructor()`
    /// for your class.
    ///
    /// # Implements
    ///
    /// [`CellLayoutExt`][trait@crate::prelude::CellLayoutExt]
    #[doc(alias = "GtkCellLayout")]
    pub struct CellLayout(Interface<ffi::GtkCellLayout, ffi::GtkCellLayoutIface>);

    match fn {
        type_ => || ffi::gtk_cell_layout_get_type(),
    }
}

impl CellLayout {
    pub const NONE: Option<&'static CellLayout> = None;
}

/// Trait containing all [`struct@CellLayout`] methods.
///
/// # Implementors
///
/// [`AppChooserButton`][struct@crate::AppChooserButton], [`CellAreaBox`][struct@crate::CellAreaBox], [`CellArea`][struct@crate::CellArea], [`CellLayout`][struct@crate::CellLayout], [`CellView`][struct@crate::CellView], [`ComboBoxText`][struct@crate::ComboBoxText], [`ComboBox`][struct@crate::ComboBox], [`EntryCompletion`][struct@crate::EntryCompletion], [`IconView`][struct@crate::IconView], [`TreeViewColumn`][struct@crate::TreeViewColumn]
pub trait CellLayoutExt: IsA<CellLayout> + 'static {
    /// Adds an attribute mapping to the list in `self`.
    ///
    /// The `column` is the column of the model to get a value from, and the
    /// `attribute` is the parameter on `cell` to be set from the value. So for
    /// example if column 2 of the model contains strings, you could have the
    /// “text” attribute of a [`CellRendererText`][crate::CellRendererText] get its values from column 2.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer]
    /// ## `attribute`
    /// an attribute on the renderer
    /// ## `column`
    /// the column position on the model to get the attribute from
    #[doc(alias = "gtk_cell_layout_add_attribute")]
    fn add_attribute(&self, cell: &impl IsA<CellRenderer>, attribute: &str, column: i32) {
        unsafe {
            ffi::gtk_cell_layout_add_attribute(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                attribute.to_glib_none().0,
                column,
            );
        }
    }

    /// Unsets all the mappings on all renderers on `self` and
    /// removes all renderers from `self`.
    #[doc(alias = "gtk_cell_layout_clear")]
    fn clear(&self) {
        unsafe {
            ffi::gtk_cell_layout_clear(self.as_ref().to_glib_none().0);
        }
    }

    /// Clears all existing attributes previously set with
    /// `gtk_cell_layout_set_attributes()`.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer] to clear the attribute mapping on
    #[doc(alias = "gtk_cell_layout_clear_attributes")]
    fn clear_attributes(&self, cell: &impl IsA<CellRenderer>) {
        unsafe {
            ffi::gtk_cell_layout_clear_attributes(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
            );
        }
    }

    /// Returns the underlying [`CellArea`][crate::CellArea] which might be `self`
    /// if called on a [`CellArea`][crate::CellArea] or might be [`None`] if no [`CellArea`][crate::CellArea]
    /// is used by `self`.
    ///
    /// # Returns
    ///
    /// the cell area used by `self`,
    /// or [`None`] in case no cell area is used.
    #[doc(alias = "gtk_cell_layout_get_area")]
    #[doc(alias = "get_area")]
    fn area(&self) -> Option<CellArea> {
        unsafe {
            from_glib_none(ffi::gtk_cell_layout_get_area(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Returns the cell renderers which have been added to `self`.
    ///
    /// # Returns
    ///
    ///
    ///  a list of cell renderers. The list, but not the renderers has
    ///  been newly allocated and should be freed with `g_list_free()`
    ///  when no longer needed.
    #[doc(alias = "gtk_cell_layout_get_cells")]
    #[doc(alias = "get_cells")]
    fn cells(&self) -> Vec<CellRenderer> {
        unsafe {
            FromGlibPtrContainer::from_glib_container(ffi::gtk_cell_layout_get_cells(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Adds the `cell` to the end of `self`. If `expand` is [`false`], then the
    /// `cell` is allocated no more space than it needs. Any unused space is
    /// divided evenly between cells for which `expand` is [`true`].
    ///
    /// Note that reusing the same cell renderer is not supported.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer]
    /// ## `expand`
    /// [`true`] if `cell` is to be given extra space allocated to `self`
    #[doc(alias = "gtk_cell_layout_pack_end")]
    fn pack_end(&self, cell: &impl IsA<CellRenderer>, expand: bool) {
        unsafe {
            ffi::gtk_cell_layout_pack_end(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                expand.into_glib(),
            );
        }
    }

    /// Packs the `cell` into the beginning of `self`. If `expand` is [`false`],
    /// then the `cell` is allocated no more space than it needs. Any unused space
    /// is divided evenly between cells for which `expand` is [`true`].
    ///
    /// Note that reusing the same cell renderer is not supported.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer]
    /// ## `expand`
    /// [`true`] if `cell` is to be given extra space allocated to `self`
    #[doc(alias = "gtk_cell_layout_pack_start")]
    fn pack_start(&self, cell: &impl IsA<CellRenderer>, expand: bool) {
        unsafe {
            ffi::gtk_cell_layout_pack_start(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                expand.into_glib(),
            );
        }
    }

    /// Re-inserts `cell` at `position`.
    ///
    /// Note that `cell` has already to be packed into `self`
    /// for this to function properly.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer] to reorder
    /// ## `position`
    /// new position to insert `cell` at
    #[doc(alias = "gtk_cell_layout_reorder")]
    fn reorder(&self, cell: &impl IsA<CellRenderer>, position: i32) {
        unsafe {
            ffi::gtk_cell_layout_reorder(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                position,
            );
        }
    }

    //#[doc(alias = "gtk_cell_layout_set_attributes")]
    //fn set_attributes(&self, cell: &impl IsA<CellRenderer>, : /*Unknown conversion*//*Unimplemented*/Basic: VarArgs) {
    //    unsafe { TODO: call ffi:gtk_cell_layout_set_attributes() }
    //}

    /// Sets the `GtkCellLayoutDataFunc` to use for `self`.
    ///
    /// This function is used instead of the standard attributes mapping
    /// for setting the column value, and should set the value of `self`’s
    /// cell renderer(s) as appropriate.
    ///
    /// `func` may be [`None`] to remove a previously set function.
    /// ## `cell`
    /// a [`CellRenderer`][crate::CellRenderer]
    /// ## `func`
    /// the `GtkCellLayoutDataFunc` to use, or [`None`]
    /// ## `func_data`
    /// user data for `func`
    #[doc(alias = "gtk_cell_layout_set_cell_data_func")]
    fn set_cell_data_func(
        &self,
        cell: &impl IsA<CellRenderer>,
        func: Option<Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>>,
    ) {
        let func_data: Box_<
            Option<Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>>,
        > = Box_::new(func);
        unsafe extern "C" fn func_func(
            cell_layout: *mut ffi::GtkCellLayout,
            cell: *mut ffi::GtkCellRenderer,
            tree_model: *mut ffi::GtkTreeModel,
            iter: *mut ffi::GtkTreeIter,
            data: glib::ffi::gpointer,
        ) {
            unsafe {
                let cell_layout = from_glib_borrow(cell_layout);
                let cell = from_glib_borrow(cell);
                let tree_model = from_glib_borrow(tree_model);
                let iter = from_glib_borrow(iter);
                let callback = &*(data as *mut Option<
                    Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>,
                >);
                if let Some(ref callback) = *callback {
                    callback(&cell_layout, &cell, &tree_model, &iter)
                } else {
                    panic!("cannot get closure...")
                }
            }
        }
        let func = if func_data.is_some() {
            Some(func_func as _)
        } else {
            None
        };
        unsafe extern "C" fn destroy_func(data: glib::ffi::gpointer) {
            unsafe {
                let _callback = Box_::from_raw(
                    data as *mut Option<
                        Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>,
                    >,
                );
            }
        }
        let destroy_call4 = Some(destroy_func as _);
        let super_callback0: Box_<
            Option<Box_<dyn Fn(&CellLayout, &CellRenderer, &TreeModel, &TreeIter) + 'static>>,
        > = func_data;
        unsafe {
            ffi::gtk_cell_layout_set_cell_data_func(
                self.as_ref().to_glib_none().0,
                cell.as_ref().to_glib_none().0,
                func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call4,
            );
        }
    }
}

impl<O: IsA<CellLayout>> CellLayoutExt for O {}