dgui.trackbar source code

1 /** DGui project file.
2 
3 Copyright: Trogu Antonio Davide 2011-2013
4 
5 License: $(HTTP boost.org/LICENSE_1_0.txt, Boost License 1.0).
6 
7 Authors: Trogu Antonio Davide
8 */
9 module dgui.trackbar;
10 
11 import dgui.core.controls.subclassedcontrol;
12 
13 class TrackBar: SubclassedControl
14 {
15 	public Event!(Control, EventArgs) valueChanged;
16 
17 	private int _minRange = 0;
18 	private int _maxRange = 100;
19 	private int _value = 0;
20 	private int _lastValue = 0;
21 
22 	@property public uint minRange()
23 	{
24 		return this._minRange;
25 	}
26 
27 	@property public void minRange(uint mr)
28 	{
29 		this._minRange = mr;
30 
31 		if(this.created)
32 		{
33 			this.sendMessage(TBM_SETRANGE, true, MAKELPARAM(this._minRange, this._maxRange));
34 		}
35 	}
36 
37 	@property public uint maxRange()
38 	{
39 		return this._maxRange;
40 	}
41 
42 	@property public void maxRange(uint mr)
43 	{
44 		this._maxRange = mr;
45 
46 		if(this.created)
47 		{
48 			this.sendMessage(TBM_SETRANGE, true, MAKELPARAM(this._minRange, this._maxRange));
49 		}
50 	}
51 
52 	@property public int value()
53 	{
54 		if(this.created)
55 		{
56 			return this.sendMessage(TBM_GETPOS, 0, 0);
57 		}
58 
59 		return this._value;
60 	}
61 
62 	@property public void value(int p)
63 	{
64 		this._value = p;
65 
66 		if(this.created)
67 		{
68 			this.sendMessage(TBM_SETPOS, true, p);
69 		}
70 	}
71 
72 	protected override void createControlParams(ref CreateControlParams ccp)
73 	{
74 		ccp.superclassName = WC_TRACKBAR;
75 		ccp.className = WC_DTRACKBAR;
76 		this.setStyle(TBS_AUTOTICKS, true);
77 
78 		assert(this._dock is DockStyle.fill, "TrackBar: Invalid Dock Style");
79 
80 		if(this._dock is DockStyle.top || this._dock is DockStyle.bottom || (this._dock is DockStyle.none && this._bounds.width >= this._bounds.height))
81 		{
82 			this.setStyle(TBS_HORZ, true);
83 		}
84 		else if(this._dock is DockStyle.left || this._dock is DockStyle.right || (this._dock is DockStyle.none && this._bounds.height < this._bounds.width))
85 		{
86 			this.setStyle(TBS_VERT, true);
87 		}
88 
89 		super.createControlParams(ccp);
90 	}
91 
92 	protected override void onHandleCreated(EventArgs e)
93 	{
94 		this.sendMessage(TBM_SETRANGE, true, MAKELPARAM(this._minRange, this._maxRange));
95 		this.sendMessage(TBM_SETTIC, 20, 0);
96 		this.sendMessage(TBM_SETPOS, true, this._value);
97 
98 		super.onHandleCreated(e);
99 	}
100 
101 	protected override void wndProc(ref Message m)
102 	{
103 		if(m.msg == WM_MOUSEMOVE && (cast(MouseKeys)m.wParam) is MouseKeys.left ||
104 		   m.msg == WM_KEYDOWN && ((cast(Keys)m.wParam) is Keys.left ||
105 		   (cast(Keys)m.wParam) is Keys.up ||
106 		   (cast(Keys)m.wParam) is Keys.right ||
107 		   (cast(Keys)m.wParam) is Keys.down))
108 		{
109 			int val = this.value;
110 
111 			if(this._lastValue != val)
112 			{
113 				this._lastValue = val; //Save last position.
114 				this.onValueChanged(EventArgs.empty);
115 			}
116 		}
117 
118 		super.wndProc(m);
119 	}
120 
121 	private void onValueChanged(EventArgs e)
122 	{
123 		this.valueChanged(this, e);
124 	}
125 }