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Viewing changes to src/ClutterFlow/ClutterFlow/AlphabetBar.cs

  • Committer: Bazaar Package Importer
  • Author(s): Iain Lane
  • Date: 2011-06-26 13:31:44 UTC
  • mfrom: (4.1.7 experimental)
  • Revision ID: james.westby@ubuntu.com-20110626133144-62h4ohgg03p5y9nl
Tags: 2.1.1-2ubuntu1
* [c0b3875] Merge from Debian Unstable, remaining changes:
  + Enable LIRC and AppIndicator extensions

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src/ClutterFlow/ClutterFlow/AlphabetBar.cs
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namespace ClutterFlow.Alphabet
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{
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        public class AlphabetEventArgs : EventArgs
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        {
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                protected AlphabetChars letter = AlphabetChars.unknown;
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                public AlphabetChars Letter {
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                        get { return letter; }
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                }
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                public AlphabetEventArgs (AlphabetChars letter) : base ()
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                {
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                        this.letter = letter;
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                }
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        }
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        public class AlphabetBar : Clutter.Group
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        {
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                #region Events
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                public event EventHandler<AlphabetEventArgs> LetterClicked;
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                protected void InvokeLetterClicked (AlphabetChars letter)
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                {
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                        if (LetterClicked!=null) LetterClicked (this, new AlphabetEventArgs (letter));
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                }
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                #endregion
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                #region Fields
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                protected CairoTexture background;
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                protected Dictionary<AlphabetChars, AlphabetButton> buttons = new Dictionary<AlphabetChars, AlphabetButton>(Enum.GetValues(typeof(AlphabetChars)).Length);
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                public AlphabetButton this [AlphabetChars index] {
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                        get { return buttons[index]; }
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                }
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                protected double Margin {
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                        get { return Width * 0.075; }
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                }
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                #endregion Fields
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                #region Initialisation
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                public AlphabetBar (uint width, uint height)
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                {
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                        this.SetSize (width, height);
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                        InitBackground ();
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                        InitButtons ();
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                        ShowAll ();
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                }
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                protected virtual void InitBackground ()
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                {
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                        background = new CairoTexture ((uint) Width,(uint) Height);
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                        Add (background);
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                        SetupBackground ();
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                        background.Show ();
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                }
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                protected virtual void SetupBackground ()
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                {
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                        background.Clear();
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                        Cairo.Context context = background.Create();
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                        double lwidth = 1;
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                        double hlwidth = lwidth*0.5;
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                        double margin = Margin;
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                        //left curvature:
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                        context.MoveTo (-hlwidth, -hlwidth);
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                        context.CurveTo (margin*0.33, -hlwidth,
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                                         margin*0.5, Height*0.4,
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                                         margin*0.5, Height*0.5);
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                        context.CurveTo (margin*0.5, Height*0.6,
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                                         margin*0.66, Height-hlwidth,
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                                         margin-hlwidth, Height-hlwidth);
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                        //straight bottom:
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                        context.LineTo (Width-margin-hlwidth, Height-hlwidth);
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                        //right curvature:
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                        context.CurveTo (Width-margin*0.66, Height - hlwidth,
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                                         Width-margin*0.5, Height*0.6,
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                                         Width-margin*0.5, Height*0.5);
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                        context.CurveTo (Width-margin*0.5, Height*0.4,
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                                         Width-margin*0.33, -hlwidth,
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                                         Width-hlwidth, -hlwidth);
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                        //straight top:
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                        context.LineTo (-hlwidth, -hlwidth);
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                        context.ClosePath ();
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                        context.LineWidth = lwidth;
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                        context.SetSourceRGBA (1.0, 1.0, 1.0, 1.0);
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                        context.StrokePreserve ();
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                        context.SetSourceRGBA (1.0, 1.0, 1.0, 0.10);
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                        context.Fill ();
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                        ((IDisposable) context.Target).Dispose();
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                        ((IDisposable) context).Dispose();
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                }
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                protected virtual void InitButtons ()
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                {
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                        Array values = Enum.GetValues(typeof(AlphabetChars));
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                        int x_step = (int) ((Width * 0.950) / values.Length);
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                        uint b_width = (uint) x_step;
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                        uint b_height = (uint) (Height - 2);
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                        int x = (int) (Margin*0.5f + x_step);
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                        int y = (int) (Height * 0.5)+2;
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                        foreach (AlphabetChars key in values) {
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                                buttons[key] = new AlphabetButton (b_width, b_height, key);
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                                buttons[key].ButtonReleaseEvent += HandleButtonReleaseEvent;
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                                Add (buttons[key]);
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                                buttons[key].SetAnchorPoint ((float) buttons[key].Width*0.5f, (float) buttons[key].Height*0.5f);
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                                buttons[key].SetPosition (x, y);
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                                x += x_step;
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                        }
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                }
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                #endregion
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                #region Event Handling
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                protected void HandleButtonReleaseEvent (object o, ButtonReleaseEventArgs args)
138
 
                {
139
 
                        if (o is  AlphabetButton) {
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                                InvokeLetterClicked ((o as AlphabetButton).Letter);
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                        }
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                }               
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                #endregion
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        }
 
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    public class AlphabetEventArgs : EventArgs
 
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    {
 
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        protected AlphabetChars letter = AlphabetChars.unknown;
 
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        public AlphabetChars Letter {
 
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            get { return letter; }
 
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        }
 
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        public AlphabetEventArgs (AlphabetChars letter) : base ()
 
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        {
 
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            this.letter = letter;
 
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        }
 
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    }
 
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    public class AlphabetBar : Clutter.Group
 
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    {
 
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        #region Events
 
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        public event EventHandler<AlphabetEventArgs> LetterClicked;
 
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        protected void InvokeLetterClicked (AlphabetChars letter)
 
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        {
 
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            if (LetterClicked!=null) LetterClicked (this, new AlphabetEventArgs (letter));
 
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        }
 
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        #endregion
 
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        #region Fields
 
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        protected CairoTexture background;
 
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        protected Dictionary<AlphabetChars, AlphabetButton> buttons = new Dictionary<AlphabetChars, AlphabetButton>(Enum.GetValues(typeof(AlphabetChars)).Length);
 
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        public AlphabetButton this [AlphabetChars index] {
 
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            get { return buttons[index]; }
 
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        }
 
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        protected double Margin {
 
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            get { return Width * 0.075; }
 
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        }
 
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        #endregion Fields
 
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        #region Initialisation
 
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        public AlphabetBar (uint width, uint height)
 
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        {
 
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            this.SetSize (width, height);
 
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            InitBackground ();
 
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            InitButtons ();
 
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57
            ShowAll ();
 
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        }
 
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        protected virtual void InitBackground ()
 
61
        {
 
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            background = new CairoTexture ((uint) Width,(uint) Height);
 
63
            Add (background);
 
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65
            SetupBackground ();
 
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            background.Show ();
 
67
        }
 
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        protected virtual void SetupBackground ()
 
70
        {
 
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            background.Clear();
 
72
            Cairo.Context context = background.Create ();
 
73
 
 
74
            double lwidth = 1;
 
75
            double hlwidth = lwidth*0.5;
 
76
 
 
77
            double margin = Margin;
 
78
 
 
79
            //left curvature:
 
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            context.MoveTo (-hlwidth, -hlwidth);
 
81
            context.CurveTo (margin*0.33, -hlwidth,
 
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                             margin*0.5, Height*0.4,
 
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                             margin*0.5, Height*0.5);
 
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            context.CurveTo (margin*0.5, Height*0.6,
 
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                             margin*0.66, Height-hlwidth,
 
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                             margin-hlwidth, Height-hlwidth);
 
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88
 
 
89
            //straight bottom:
 
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            context.LineTo (Width-margin-hlwidth, Height-hlwidth);
 
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            //right curvature:
 
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            context.CurveTo (Width-margin*0.66, Height - hlwidth,
 
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                             Width-margin*0.5, Height*0.6,
 
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                             Width-margin*0.5, Height*0.5);
 
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            context.CurveTo (Width-margin*0.5, Height*0.4,
 
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                             Width-margin*0.33, -hlwidth,
 
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                             Width-hlwidth, -hlwidth);
 
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            //straight top:
 
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            context.LineTo (-hlwidth, -hlwidth);
 
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            context.ClosePath ();
 
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            context.LineWidth = lwidth;
 
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            context.SetSourceRGBA (1.0, 1.0, 1.0, 1.0);
 
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            context.StrokePreserve ();
 
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            context.SetSourceRGBA (1.0, 1.0, 1.0, 0.10);
 
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            context.Fill ();
 
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            ((IDisposable) context.Target).Dispose();
 
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            ((IDisposable) context).Dispose();
 
112
        }
 
113
 
 
114
        protected virtual void InitButtons ()
 
115
        {
 
116
            Array values = Enum.GetValues(typeof(AlphabetChars));
 
117
 
 
118
            int x_step = (int) ((Width * 0.950) / values.Length);
 
119
            uint b_width = (uint) x_step;
 
120
            uint b_height = (uint) (Height - 2);
 
121
 
 
122
            int x = (int) (Margin*0.5f + x_step);
 
123
            int y = (int) (Height * 0.5)+2;
 
124
 
 
125
            foreach (AlphabetChars key in values) {
 
126
                buttons[key] = new AlphabetButton (b_width, b_height, key);
 
127
                buttons[key].ButtonReleaseEvent += HandleButtonReleaseEvent;
 
128
                Add (buttons[key]);
 
129
                buttons[key].SetAnchorPoint ((float) buttons[key].Width*0.5f, (float) buttons[key].Height*0.5f);
 
130
                buttons[key].SetPosition (x, y);
 
131
                x += x_step;
 
132
            }
 
133
        }
 
134
        #endregion
 
135
 
 
136
        #region Event Handling
 
137
        protected void HandleButtonReleaseEvent (object o, ButtonReleaseEventArgs args)
 
138
        {
 
139
            if (o is  AlphabetButton) {
 
140
                InvokeLetterClicked ((o as AlphabetButton).Letter);
 
141
            }
 
142
        }
 
143
        #endregion
 
144
    }
145
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}