### Interface

# Gtk ConstraintTarget

#### Description [src]

    interface Gtk.ConstraintTarget : GObject.Object

Makes it possible to use an object as source or target in a `GtkConstraint`.

Besides `GtkWidget`, it is also implemented by `GtkConstraintGuide`.

#### Prerequisite

In order to implement ConstraintTarget, your type must inherit from`GObject`.

#### Implementations

- GtkAboutDialog
- GtkActionBar
- GtkAppChooserButton
- GtkAppChooserDialog
- GtkAppChooserWidget
- GtkApplicationWindow
- GtkAspectFrame
- GtkAssistant
- GtkBox
- GtkButton
- GtkCalendar
- GtkCellView
- GtkCenterBox
- GtkCheckButton
- GtkColorButton
- GtkColorChooserDialog
- GtkColorChooserWidget
- GtkColorDialogButton
- GtkColumnView
- GtkComboBox
- GtkComboBoxText
- GtkConstraintGuide
- GtkDialog
- GtkDragIcon
- GtkDrawingArea
- GtkDropDown
- GtkEditableLabel
- GtkEmojiChooser
- GtkEntry
- GtkExpander
- GtkFileChooserDialog
- GtkFileChooserWidget
- GtkFixed
- GtkFlowBox
- GtkFlowBoxChild
- GtkFontButton
- GtkFontChooserDialog
- GtkFontChooserWidget
- GtkFontDialogButton
- GtkFrame
- GtkGLArea
- GtkGraphicsOffload
- GtkGrid
- GtkGridView
- GtkHeaderBar
- GtkIconView
- GtkImage
- GtkInfoBar
- GtkInscription
- GtkLabel
- GtkLevelBar
- GtkLinkButton
- GtkListBase
- GtkListBox
- GtkListBoxRow
- GtkListView
- GtkLockButton
- GtkMediaControls
- GtkMenuButton
- GtkMessageDialog
- GtkNotebook
- GtkOverlay
- GtkPageSetupUnixDialog
- GtkPaned
- GtkPasswordEntry
- GtkPicture
- GtkPopover
- GtkPopoverBin
- GtkPopoverMenu
- GtkPopoverMenuBar
- GtkPrintUnixDialog
- GtkProgressBar
- GtkRange
- GtkRevealer
- GtkScale
- GtkScaleButton
- GtkScrollbar
- GtkScrolledWindow
- GtkSearchBar
- GtkSearchEntry
- GtkSeparator
- GtkShortcutLabel
- GtkShortcutsGroup
- GtkShortcutsSection
- GtkShortcutsShortcut
- GtkShortcutsWindow
- GtkSpinButton
- GtkSpinner
- GtkStack
- GtkStackSidebar
- GtkStackSwitcher
- GtkStatusbar
- GtkSvgWidget
- GtkSwitch
- GtkText
- GtkTextView
- GtkToggleButton
- GtkTreeExpander
- GtkTreeView
- GtkVideo
- GtkViewport
- GtkVolumeButton
- GtkWidget
- GtkWindow
- GtkWindowControls
- GtkWindowHandle

#### Interface structure

    struct GtkConstraintTargetInterface {
      /* no available fields */
    }

No description available.