Gtk.Widget.measure
Description: Reference for Gtk.Widget.measure

### Virtual Method

# Gtk Widgetmeasure

#### Declaration [src]

    void
    measure (
      GtkWidget* widget,
      GtkOrientation orientation,
      int for_size,
      int* minimum,
      int* natural,
      int* minimum_baseline,
      int* natural_baseline
    )

#### Description [src]

Measures `widget` in the orientation `orientation` and for the given `for_size`.

As an example, if `orientation` is `GTK_ORIENTATION_HORIZONTAL` and `for_size` is 300, this functions will compute the minimum and natural width of `widget` if it is allocated at a height of 300 pixels.

See GtkWidget’s geometry management section for a more details on implementing `GtkWidgetClass.measure()`.

#### Parameters

`orientation` | `GtkOrientation`
| The orientation to measure.
`for_size` | `int`
| Size for the opposite of `orientation`, i.e. if `orientation` is `GTK_ORIENTATION_HORIZONTAL`, this is the height the widget should be measured with. The `GTK_ORIENTATION_VERTICAL` case is analogous. This way, both height-for-width and width-for-height requests can be implemented. If no size is known, -1 can be passed.
`minimum` | `int*`
| Location to store the minimum size.
| The argument will be set by the function.
| The argument can be `NULL`.
| The called function takes ownership of the data, and is responsible for freeing it.
`natural` | `int*`
| Location to store the natural size.
| The argument will be set by the function.
| The argument can be `NULL`.
| The called function takes ownership of the data, and is responsible for freeing it.
`minimum_baseline` | `int*`
| Location to store the baseline position for the minimum size.
| The argument will be set by the function.
| The argument can be `NULL`.
| The called function takes ownership of the data, and is responsible for freeing it.
`natural_baseline` | `int*`
| Location to store the baseline position for the natural size.
| The argument will be set by the function.
| The argument can be `NULL`.
| The called function takes ownership of the data, and is responsible for freeing it.