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using System;
using System.Collections.Generic;
using Clutter;
using ClutterFlow.Buttons;
namespace ClutterFlow.Alphabet
{
public class AlphabetEventArgs : EventArgs
{
protected AlphabetChars letter = AlphabetChars.unknown;
public AlphabetChars Letter {
get { return letter; }
}
public AlphabetEventArgs (AlphabetChars letter) : base ()
{
this.letter = letter;
}
}
public class AlphabetBar : Clutter.Group
{
#region Events
public event EventHandler<AlphabetEventArgs> LetterClicked;
protected void InvokeLetterClicked (AlphabetChars letter)
{
if (LetterClicked!=null) LetterClicked (this, new AlphabetEventArgs (letter));
}
#endregion
#region Fields
protected CairoTexture background;
protected Dictionary<AlphabetChars, AlphabetButton> buttons = new Dictionary<AlphabetChars, AlphabetButton>(Enum.GetValues(typeof(AlphabetChars)).Length);
public AlphabetButton this [AlphabetChars index] {
get { return buttons[index]; }
}
protected double Margin {
get { return Width * 0.075; }
}
#endregion Fields
#region Initialisation
public AlphabetBar (uint width, uint height)
{
this.SetSize (width, height);
InitBackground ();
InitButtons ();
ShowAll ();
}
protected virtual void InitBackground ()
{
background = new CairoTexture ((uint) Width,(uint) Height);
Add (background);
SetupBackground ();
background.Show ();
}
protected virtual void SetupBackground ()
{
background.Clear();
Cairo.Context context = background.Create ();
double lwidth = 1;
double hlwidth = lwidth*0.5;
double margin = Margin;
//left curvature:
context.MoveTo (-hlwidth, -hlwidth);
context.CurveTo (margin*0.33, -hlwidth,
margin*0.5, Height*0.4,
margin*0.5, Height*0.5);
context.CurveTo (margin*0.5, Height*0.6,
margin*0.66, Height-hlwidth,
margin-hlwidth, Height-hlwidth);
//straight bottom:
context.LineTo (Width-margin-hlwidth, Height-hlwidth);
//right curvature:
context.CurveTo (Width-margin*0.66, Height - hlwidth,
Width-margin*0.5, Height*0.6,
Width-margin*0.5, Height*0.5);
context.CurveTo (Width-margin*0.5, Height*0.4,
Width-margin*0.33, -hlwidth,
Width-hlwidth, -hlwidth);
//straight top:
context.LineTo (-hlwidth, -hlwidth);
context.ClosePath ();
context.LineWidth = lwidth;
context.SetSourceRGBA (1.0, 1.0, 1.0, 1.0);
context.StrokePreserve ();
context.SetSourceRGBA (1.0, 1.0, 1.0, 0.10);
context.Fill ();
((IDisposable) context.Target).Dispose();
((IDisposable) context).Dispose();
}
protected virtual void InitButtons ()
{
Array values = Enum.GetValues(typeof(AlphabetChars));
int x_step = (int) ((Width * 0.950) / values.Length);
uint b_width = (uint) x_step;
uint b_height = (uint) (Height - 2);
int x = (int) (Margin*0.5f + x_step);
int y = (int) (Height * 0.5)+2;
foreach (AlphabetChars key in values) {
buttons[key] = new AlphabetButton (b_width, b_height, key);
buttons[key].ButtonReleaseEvent += HandleButtonReleaseEvent;
Add (buttons[key]);
buttons[key].SetAnchorPoint ((float) buttons[key].Width*0.5f, (float) buttons[key].Height*0.5f);
buttons[key].SetPosition (x, y);
x += x_step;
}
}
#endregion
#region Event Handling
protected void HandleButtonReleaseEvent (object o, ButtonReleaseEventArgs args)
{
if (o is AlphabetButton) {
InvokeLetterClicked ((o as AlphabetButton).Letter);
}
}
#endregion
}
}
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