TooltipRef

public struct TooltipRef : TooltipProtocol, GWeakCapturing

Basic tooltips can be realized simply by using gtk_widget_set_tooltip_text() or gtk_widget_set_tooltip_markup() without any explicit tooltip object.

When you need a tooltip with a little more fancy contents, like adding an image, or you want the tooltip to have different contents per GtkTreeView row or cell, you will have to do a little more work:

  • Set the GtkWidget:has-tooltip property to true, this will make GTK+ monitor the widget for motion and related events which are needed to determine when and where to show a tooltip.

  • Connect to the GtkWidget::query-tooltip signal. This signal will be emitted when a tooltip is supposed to be shown. One of the arguments passed to the signal handler is a GtkTooltip object. This is the object that we are about to display as a tooltip, and can be manipulated in your callback using functions like gtk_tooltip_set_icon(). There are functions for setting the tooltip’s markup, setting an image from a named icon, or even putting in a custom widget.

Return true from your query-tooltip handler. This causes the tooltip to be show. If you return false, it will not be shown.

In the probably rare case where you want to have even more control over the tooltip that is about to be shown, you can set your own GtkWindow which will be used as tooltip window. This works as follows:

  • Set GtkWidget:has-tooltip and connect to GtkWidget::query-tooltip as before. Use gtk_widget_set_tooltip_window() to set a GtkWindow created by you as tooltip window.

  • In the GtkWidget::query-tooltip callback you can access your window using gtk_widget_get_tooltip_window() and manipulate as you wish. The semantics of the return value are exactly as before, return true to show the window, false to not show it.

The TooltipRef type acts as a lightweight Swift reference to an underlying GtkTooltip instance. It exposes methods that can operate on this data type through TooltipProtocol conformance. Use TooltipRef only as an unowned reference to an existing GtkTooltip instance.

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  • ptr 
    Untyped pointer to the underlying `GtkTooltip` instance.

    For type-safe access, use the generated, typed pointer tooltip_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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Tooltip Class

  • Designated initialiser from the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafeMutablePointer<GtkTooltip>)
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  • Designated initialiser from a constant pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafePointer<GtkTooltip>)
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  • Conditional initialiser from an optional pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafeMutablePointer<GtkTooltip>?)
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  • Conditional initialiser from an optional, non-mutable pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafePointer<GtkTooltip>?)
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  • Conditional initialiser from an optional gpointer

    Declaration

    Swift

    @inlinable
init!(gpointer g: gpointer?)
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  • Conditional initialiser from an optional, non-mutable gconstpointer

    Declaration

    Swift

    @inlinable
init!(gconstpointer g: gconstpointer?)
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  • Reference intialiser for a related type that implements TooltipProtocol

    Declaration

    Swift

    @inlinable
init<T>(_ other: T) where T : TooltipProtocol
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  • This factory is syntactic sugar for setting weak pointers wrapped in GWeak<T>

    Declaration

    Swift

    @inlinable
static func unowned<T>(_ other: T) -> TooltipRef where T : TooltipProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to TooltipProtocol.

    Declaration

    Swift

    @inlinable
init<T>(cPointer: UnsafeMutablePointer<T>)
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to TooltipProtocol.

    Declaration

    Swift

    @inlinable
init<T>(constPointer: UnsafePointer<T>)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to TooltipProtocol.

    Declaration

    Swift

    @inlinable
init(mutating raw: UnsafeRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to TooltipProtocol.

    Declaration

    Swift

    @inlinable
init(raw: UnsafeMutableRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to TooltipProtocol.

    Declaration

    Swift

    @inlinable
init(opaquePointer: OpaquePointer)
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