/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module gtk.Scale;

private import glib.ConstructionException;
private import glib.Str;
private import gobject.ObjectG;
private import gtk.Adjustment;
private import gtk.Range;
private import gtk.Widget;
private import gtk.c.functions;
public  import gtk.c.types;
private import pango.PgLayout;


/**
 * A `GtkScale` is a slider control used to select a numeric value.
 * 
 * ![An example GtkScale](scales.png)
 * 
 * To use it, you’ll probably want to investigate the methods on its base
 * class, [class@GtkRange], in addition to the methods for `GtkScale` itself.
 * To set the value of a scale, you would normally use [method@Gtk.Range.set_value].
 * To detect changes to the value, you would normally use the
 * [signal@Gtk.Range::value-changed] signal.
 * 
 * Note that using the same upper and lower bounds for the `GtkScale` (through
 * the `GtkRange` methods) will hide the slider itself. This is useful for
 * applications that want to show an undeterminate value on the scale, without
 * changing the layout of the application (such as movie or music players).
 * 
 * # GtkScale as GtkBuildable
 * 
 * `GtkScale` supports a custom <marks> element, which can contain multiple
 * <mark\> elements. The “value” and “position” attributes have the same
 * meaning as [method@Gtk.Scale.add_mark] parameters of the same name. If
 * the element is not empty, its content is taken as the markup to show at
 * the mark. It can be translated with the usual ”translatable” and
 * “context” attributes.
 * 
 * # CSS nodes
 * 
 * ```
 * scale[.fine-tune][.marks-before][.marks-after]
 * ├── [value][.top][.right][.bottom][.left]
 * ├── marks.top
 * │   ├── mark
 * │   ┊    ├── [label]
 * │   ┊    ╰── indicator
 * ┊   ┊
 * │   ╰── mark
 * ├── marks.bottom
 * │   ├── mark
 * │   ┊    ├── indicator
 * │   ┊    ╰── [label]
 * ┊   ┊
 * │   ╰── mark
 * ╰── trough
 * ├── [fill]
 * ├── [highlight]
 * ╰── slider
 * ```
 * 
 * `GtkScale` has a main CSS node with name scale and a subnode for its contents,
 * with subnodes named trough and slider.
 * 
 * The main node gets the style class .fine-tune added when the scale is in
 * 'fine-tuning' mode.
 * 
 * If the scale has an origin (see [method@Gtk.Scale.set_has_origin]), there is
 * a subnode with name highlight below the trough node that is used for rendering
 * the highlighted part of the trough.
 * 
 * If the scale is showing a fill level (see [method@Gtk.Range.set_show_fill_level]),
 * there is a subnode with name fill below the trough node that is used for
 * rendering the filled in part of the trough.
 * 
 * If marks are present, there is a marks subnode before or after the trough
 * node, below which each mark gets a node with name mark. The marks nodes get
 * either the .top or .bottom style class.
 * 
 * The mark node has a subnode named indicator. If the mark has text, it also
 * has a subnode named label. When the mark is either above or left of the
 * scale, the label subnode is the first when present. Otherwise, the indicator
 * subnode is the first.
 * 
 * The main CSS node gets the 'marks-before' and/or 'marks-after' style classes
 * added depending on what marks are present.
 * 
 * If the scale is displaying the value (see [property@Gtk.Scale:draw-value]),
 * there is subnode with name value. This node will get the .top or .bottom style
 * classes similar to the marks node.
 * 
 * # Accessibility
 * 
 * `GtkScale` uses the %GTK_ACCESSIBLE_ROLE_SLIDER role.
 */
public class Scale : Range
{
	/** the main Gtk struct */
	protected GtkScale* gtkScale;

	/** Get the main Gtk struct */
	public GtkScale* getScaleStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gtkScale;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gtkScale;
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GtkScale* gtkScale, bool ownedRef = false)
	{
		this.gtkScale = gtkScale;
		super(cast(GtkRange*)gtkScale, ownedRef);
	}


	/** */
	public static GType getType()
	{
		return gtk_scale_get_type();
	}

	/**
	 * Creates a new `GtkScale`.
	 *
	 * Params:
	 *     orientation = the scale’s orientation.
	 *     adjustment = the [class@Gtk.Adjustment] which sets
	 *         the range of the scale, or %NULL to create a new adjustment.
	 *
	 * Returns: a new `GtkScale`
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(GtkOrientation orientation, Adjustment adjustment)
	{
		auto __p = gtk_scale_new(orientation, (adjustment is null) ? null : adjustment.getAdjustmentStruct());

		if(__p is null)
		{
			throw new ConstructionException("null returned by new");
		}

		this(cast(GtkScale*) __p);
	}

	/**
	 * Creates a new scale widget with a range from @min to @max.
	 *
	 * The returns scale will have the given orientation and will let the
	 * user input a number between @min and @max (including @min and @max)
	 * with the increment @step. @step must be nonzero; it’s the distance
	 * the slider moves when using the arrow keys to adjust the scale
	 * value.
	 *
	 * Note that the way in which the precision is derived works best if
	 * @step is a power of ten. If the resulting precision is not suitable
	 * for your needs, use [method@Gtk.Scale.set_digits] to correct it.
	 *
	 * Params:
	 *     orientation = the scale’s orientation.
	 *     min = minimum value
	 *     max = maximum value
	 *     step = step increment (tick size) used with keyboard shortcuts
	 *
	 * Returns: a new `GtkScale`
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(GtkOrientation orientation, double min, double max, double step)
	{
		auto __p = gtk_scale_new_with_range(orientation, min, max, step);

		if(__p is null)
		{
			throw new ConstructionException("null returned by new_with_range");
		}

		this(cast(GtkScale*) __p);
	}

	/**
	 * Adds a mark at @value.
	 *
	 * A mark is indicated visually by drawing a tick mark next to the scale,
	 * and GTK makes it easy for the user to position the scale exactly at the
	 * marks value.
	 *
	 * If @markup is not %NULL, text is shown next to the tick mark.
	 *
	 * To remove marks from a scale, use [method@Gtk.Scale.clear_marks].
	 *
	 * Params:
	 *     value = the value at which the mark is placed, must be between
	 *         the lower and upper limits of the scales’ adjustment
	 *     position = where to draw the mark. For a horizontal scale, %GTK_POS_TOP
	 *         and %GTK_POS_LEFT are drawn above the scale, anything else below.
	 *         For a vertical scale, %GTK_POS_LEFT and %GTK_POS_TOP are drawn to
	 *         the left of the scale, anything else to the right.
	 *     markup = Text to be shown at the mark, using Pango markup
	 */
	public void addMark(double value, GtkPositionType position, string markup)
	{
		gtk_scale_add_mark(gtkScale, value, position, Str.toStringz(markup));
	}

	/**
	 * Removes any marks that have been added.
	 */
	public void clearMarks()
	{
		gtk_scale_clear_marks(gtkScale);
	}

	/**
	 * Gets the number of decimal places that are displayed in the value.
	 *
	 * Returns: the number of decimal places that are displayed
	 */
	public int getDigits()
	{
		return gtk_scale_get_digits(gtkScale);
	}

	/**
	 * Returns whether the current value is displayed as a string
	 * next to the slider.
	 *
	 * Returns: whether the current value is displayed as a string
	 */
	public bool getDrawValue()
	{
		return gtk_scale_get_draw_value(gtkScale) != 0;
	}

	/**
	 * Returns whether the scale has an origin.
	 *
	 * Returns: %TRUE if the scale has an origin.
	 */
	public bool getHasOrigin()
	{
		return gtk_scale_get_has_origin(gtkScale) != 0;
	}

	/**
	 * Gets the `PangoLayout` used to display the scale.
	 *
	 * The returned object is owned by the scale so does not need
	 * to be freed by the caller.
	 *
	 * Returns: the [class@Pango.Layout]
	 *     for this scale, or %NULL if the [property@GtkScale:draw-value]
	 *     property is %FALSE.
	 */
	public PgLayout getLayout()
	{
		auto __p = gtk_scale_get_layout(gtkScale);

		if(__p is null)
		{
			return null;
		}

		return ObjectG.getDObject!(PgLayout)(cast(PangoLayout*) __p);
	}

	/**
	 * Obtains the coordinates where the scale will draw the
	 * `PangoLayout` representing the text in the scale.
	 *
	 * Remember when using the `PangoLayout` function you need to
	 * convert to and from pixels using `PANGO_PIXELS()` or `PANGO_SCALE`.
	 *
	 * If the [property@GtkScale:draw-value] property is %FALSE, the return
	 * values are undefined.
	 *
	 * Params:
	 *     x = location to store X offset of layout
	 *     y = location to store Y offset of layout
	 */
	public void getLayoutOffsets(out int x, out int y)
	{
		gtk_scale_get_layout_offsets(gtkScale, &x, &y);
	}

	/**
	 * Gets the position in which the current value is displayed.
	 *
	 * Returns: the position in which the current value is displayed
	 */
	public GtkPositionType getValuePos()
	{
		return gtk_scale_get_value_pos(gtkScale);
	}

	/**
	 * Sets the number of decimal places that are displayed in the value.
	 *
	 * Also causes the value of the adjustment to be rounded to this number
	 * of digits, so the retrieved value matches the displayed one, if
	 * [property@GtkScale:draw-value] is %TRUE when the value changes. If
	 * you want to enforce rounding the value when [property@GtkScale:draw-value]
	 * is %FALSE, you can set [property@GtkRange:round-digits] instead.
	 *
	 * Note that rounding to a small number of digits can interfere with
	 * the smooth autoscrolling that is built into `GtkScale`. As an alternative,
	 * you can use [method@Gtk.Scale.set_format_value_func] to format the displayed
	 * value yourself.
	 *
	 * Params:
	 *     digits = the number of decimal places to display,
	 *         e.g. use 1 to display 1.0, 2 to display 1.00, etc
	 */
	public void setDigits(int digits)
	{
		gtk_scale_set_digits(gtkScale, digits);
	}

	/**
	 * Specifies whether the current value is displayed as a string next
	 * to the slider.
	 *
	 * Params:
	 *     drawValue = %TRUE to draw the value
	 */
	public void setDrawValue(bool drawValue)
	{
		gtk_scale_set_draw_value(gtkScale, drawValue);
	}

	/**
	 * @func allows you to change how the scale value is displayed.
	 *
	 * The given function will return an allocated string representing
	 * @value. That string will then be used to display the scale's value.
	 *
	 * If #NULL is passed as @func, the value will be displayed on
	 * its own, rounded according to the value of the
	 * [property@GtkScale:digits] property.
	 *
	 * Params:
	 *     func = function that formats the value
	 *     userData = user data to pass to @func
	 *     destroyNotify = destroy function for @user_data
	 */
	public void setFormatValueFunc(GtkScaleFormatValueFunc func, void* userData, GDestroyNotify destroyNotify)
	{
		gtk_scale_set_format_value_func(gtkScale, func, userData, destroyNotify);
	}

	/**
	 * Sets whether the scale has an origin.
	 *
	 * If [property@GtkScale:has-origin] is set to %TRUE (the default),
	 * the scale will highlight the part of the trough between the origin
	 * (bottom or left side) and the current value.
	 *
	 * Params:
	 *     hasOrigin = %TRUE if the scale has an origin
	 */
	public void setHasOrigin(bool hasOrigin)
	{
		gtk_scale_set_has_origin(gtkScale, hasOrigin);
	}

	/**
	 * Sets the position in which the current value is displayed.
	 *
	 * Params:
	 *     pos = the position in which the current value is displayed
	 */
	public void setValuePos(GtkPositionType pos)
	{
		gtk_scale_set_value_pos(gtkScale, pos);
	}
}