tdemultimedia/arts/gui/common/artsgui.idl

    /*

    Copyright (C) 2000 Stefan Westerfeld
                       stefan@space.twc.de
                  2001, 2002 Matthias Kretz <kretz@kde.org>
                  2003 Arnold Krille <arnold@arnoldarts.de>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.

    */

/*
 * DISCLAIMER: The interfaces in artsgui.idl (and the derived .cc/.h files)
 *             DO NOT GUARANTEE BINARY COMPATIBILITY YET.
 *
 * They are intended for developers. You shouldn't expect that applications in
 * binary form will be fully compatibile with further releases of these
 * interfaces.
 */

module Arts {
	// MayGrow = 1,
	// ExpMask = 2,
	// MayShrink = 4
	enum SizePolicy {
		spFixed = 0,
		spMinimum = 1,
		spMaximum = 4,
		spPreferred = 5,
		spMinimumExpanding = 3,
		spExpanding = 7,
		spIgnored = 2
	};

	interface Widget {
		readonly attribute long widgetID;

		attribute Widget parent;
		attribute long x,y,width,height;
		attribute boolean visible;
		attribute SizePolicy hSizePolicy;
		attribute SizePolicy vSizePolicy;

		void show();
		void hide();
	};

	enum Shape {
		NoFrame = 0,
		Box = 0x0001,
		Panel = 0x0002,
		WinPanel = 0x0003,
		HLine = 0x0004,
		VLine = 0x0005,
		StyledPanel = 0x0006,
		PopupPanel = 0x0007,
		MenuBarPanel = 0x0008,
		ToolBarPanel = 0x0009,
		LineEditPanel = 0x000a,
		TabWidgetPanel = 0x000b,
		MShape = 0x000f
	};

	enum Shadow {
		Plain = 0x0010,
		Raised = 0x0020,
		Sunken = 0x0030,
		MShadow = 0x00f0
	};

	interface Frame : Widget {
		void constructor( Widget parent );

		attribute long margin;
		attribute long linewidth;
		attribute long midlinewidth;

		attribute long framestyle;
		attribute Shape frameshape;
		attribute Shadow frameshadow;
	};

	/**
		Some alignmentflags used by various widgets.
		Taken from Qt. (akrille)
		*/
	enum Align {
		AlignAuto=0,
		AlignLeft=1,
		AlignRight=2,
		AlignHCenter=4,
		AlignJustify=8,
		AlignTop=16,
		AlignBottom=32,
		AlignVCenter=64,
		AlignCenter=68
	};

	/**
		Directions. From Qt. (akrille)
	*/
	enum Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop };

	/** The LayoutBox. - Arrange your widgets vertical or horizontal.

		Usage is quite simple: Add the widgets you have in the right order
		to the layoutbox by calling addWidget().
		Thats it, no ._addChild or .parent with this widget.

		For more information see QBoxLayout.
		(akrille)
		*/
	interface LayoutBox : Frame {
		/// Sets the direction of the widgets. Can be changed on-the-fly.
		attribute Direction direction;
		/// Adds a widget with the stretch-factor and the alignment.
		void addWidget( Widget widget, long stretch, long align );
		void addWidget( Widget widget, long stretch );
		void addWidget( Widget widget );
		/// Inserts the Widget at the given position
		void insertWidget( long position, Widget widget, long stretch, long align );
		void insertWidget( long position, Widget widget, long stretch );
		void insertWidget( long position, Widget widget );
		/// Adds a stretch with stretch-factor.
		void addStretch( long stretch );
		void addStretch();
		/// Adds a Spacer the given width or height according your direction.
		void addSpace( long space );
		/** [From QBoxLayout]
		    Limits the perpendicular dimension of the box (e.g. height if the
		    box is LeftToRight) to a minimum of size. Other constraints may
		    increase the limit.
		*/
		void addStrut( long size );
		/// Adds a separator (a horizontal/vertical line)
		void addSeparator(long stretch, long align);
		void addSeparator(long stretch);
		void addSeparator();
		/// Adds a line with width and space left/right (top/bottom)
		void addLine(long width, long space, long stretch, long align);
		void addLine(long width, long space, long stretch);
		void addLine(long width, long space);
		/// The spacing between all widgets.
		attribute long spacing;
		/// The margin at the outsideborder.
		attribute long layoutmargin;
	};

	/** IMHO (akrille) this should be removed and everywhere replaced with the LayoutBox... */
	interface HBox : Frame {
		attribute long spacing;
	};

	interface VBox : Frame {
		attribute long spacing;
	};

	/** The PopupBox. - It can hide the widgets inside or show them as an own window.

		Usage is quite simple: Create the Widget you want to be hidable inside
		a container like LayoutBox or a normal widget. Then create the PopupBox
		and call <Name_of_PopupBox>.widget( <Name_of_your_Container> ).
		Thats it, no ._addChild or .parent with this widget.
		(akrille)
		*/
	interface PopupBox : Frame {
		/// The direction of the PopupBox.
		attribute Direction direction;
		/// The name of the box, this gets shown inside the titlebar if its not inside but an own toplevel-widget.
		attribute string name;
		/// Sets the widget that is shown/hidden.
		attribute Widget widget;
	};

	interface Button : Widget {
		void constructor( Widget parent );
		void constructor( string text, Widget parent );

		attribute string text;
		attribute boolean toggle;
		readonly attribute boolean pressed;
		readonly attribute boolean clicked; //clicked( true ) is emitted whenever the button
		                                    //is pressed an released with the mouse cursor
		                                    //still above the button
	};

	interface Poti : Frame {
		attribute string caption, color;
		attribute float min, max, value;
		attribute float logarithmic;
		attribute long range;
	};

	interface Fader : Widget {
		void constructor( Widget parent );

		attribute string caption, color;
		attribute float min, max, value;
		attribute float logarithmic;
	};

	interface LineEdit : Widget {
		void constructor( Widget parent );

		attribute string caption;
		attribute string text;
	};

	interface SpinBox : Widget {
		void constructor( Widget parent );

		attribute string caption;
		attribute long min, max, value;
	};

	interface ComboBox : Widget {
		void constructor( Widget parent );

		attribute string caption;
		attribute sequence<string> choices;
		attribute string value;
	};

	interface Graph : Widget {
		void constructor( Widget parent );

		attribute string caption;
		attribute float minx, maxx, miny, maxy;
	};

	struct GraphPoint {
		float x, y;
	};
	interface GraphLine {
		attribute Graph graph;
		attribute boolean editable;
		attribute string color;
		attribute sequence<GraphPoint> points;
	};

	enum TextBottom { South, North, West, East };

	interface Label : Frame {
		/// The text to show.
		attribute string text;
		/// The alignment of the text. See enum Align
		attribute long align;
		/// Fontsize [pixel]
		/*writeonly*/ attribute long fontsize;
		/// Fontfamily
		/*writeonly*/ attribute string fontfamily;
		/// Direction of the text in normal L-R-mode. Is used to rotate the text accordingly.
		attribute TextBottom bottom;
	};

/// Some Notes:
//   - The calculation of the peak is very easy, but it can be changed without changing all styles..

	/** * Styles for the LevelMeter. *
		In Detail:
			- lmNormalBars: <count> colored Bars.
			- lmFireBars: One Bar moving up and down.
			- lmLineBars: One Bar moving up and down, color depends on the invalue.
				substyle:
					- 0: various colors
					- 1: one color (blue) with clipping (red). The old aRtsControl style.
			- lmLEDs: <count> but not more than [height|width]/15 LEDs. (not yet implemented)
				So minimum size of the LED's is 15 pixel.
				substyle (first tree belong together others are to be or'ed):
					- 1: Flat
					- 2: Raised
					- 3: Sunken
					- 4: Circular (otherwise Rectangular)
					- 8: SingleColor (otherwise in colors green/yellow/red)
			- lmAnalog: An old-style analog VU-Meter. (not yet implemented)
			- lmSmall: One Bar with the color depending on the invalue.
	 */
	enum LevelMeterStyle { lmNormalBars, lmFireBars, lmLineBars, lmLEDs, lmAnalog, lmSmall };

	/**
		One LevelMeter
	*/
	interface LevelMeter : Frame {
		/**
			The Style of the LevelMeter.
		*/
		attribute LevelMeterStyle style;
		/**
			A substyle. Is different on every style;-)
		*/
		attribute long substyle;
		/**
			How many Bars/LEDs it should have. If the size is smaller than
			this count it will have only that many Bars. So set Count to something
			very high for smooth vu-meters.
			Note: not every Style will honor this.
			Note2: Perhaps this could be integrated into substyle.
		*/
		attribute long count;
		/**
			Sets the peakfalloff. Set to 0 to deactivate peaks.
			Is used for weighting the average.
			Peak is evaluated: ( peakfalloff * oldpeak + invalue ) / ( peakfalloff + 1 )
		*/
		attribute long peakfalloff;
		/**
			Minimum and minimum dB for the LevelMeter.
			Maximum should always be 0dB.
		*/
		attribute float mindB, maxdB;
		/**
			The incomming signal...
			This attribute always returns 0.0, altough it processes all its input.
		*/
		/*writeonly*/ attribute float invalue;
		/**
			The Direction of the levelmeter from null-value to highest value.
		*/
		attribute Direction direction;
	};

	/// Some positions.
	enum Position { posLeft=0x0001, posRight=0x0002, posTop=0x0004, posBottom=0x0008 };

	/// Tickmarks for LevelMeter / Fader / etc.
	interface Tickmarks : Frame {
		void constructor( float min, float max, Direction dir, long pos );
		/// Minimum/Maximum shown value.
		attribute float min, max;
		/// The minimal stepsize for numbers, and substep for smaller marks.
		attribute float minstep, substep;
		/// Direction from min to max.
		attribute Direction direction;
		/**
		 * The position of the levelmeter/fader/etc which gets the marks.
		 * Only Left/Right are needed. As if direction is Up/Down...
		 * For stereotickmarks set this to posLeft|posRight.
		*/
		attribute long position;
	};

	/// A Fader specially for volumes
	//     Maybe something can be ported to the normal Fader.
	interface VolumeFader : Frame {
		void constructor( float dbmin, float dbmax, Direction dir );
		/// Minimum/Maximum values in dB
		attribute float dbmin, dbmax;
		/// Direction from min to max
		attribute Direction direction;
		/**
		 *The actual volume (calling this value only changes the gui and not the
		 * underlying/connected objects ie. doesn't send a change notification.)
		 */
		attribute float volume;
		/// The actual volume in dB (no change notification)
		attribute float dbvolume;
	};

	/**
	 * A gui factory is an object that can create a Widget which provides a
	 * user interface for a running object (for instance, you might have an
	 * effect running somewhere, and a gui factory 
	 *
	 * TODO: do we need another argument (or other arguments) to specify
	 * style or other parameters?
	 */
	interface GuiFactory {
		Widget createGui(object runningObject);
	};

	/**
	 * Convenience gui factory, which knows how and whether to
	 *
	 *  - build a gui out of hints?
	 *  - create an artsbuilder built gui?
	 *  - create a gui composed of other widgets?
	 *  - create a completely custom gui?
	 */
	interface GenericGuiFactory : GuiFactory {
	};
};

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