desgui.core.label source code

1 /+
2 The MIT License (MIT)
3 
4     Copyright (c) <2013> <Oleg Butko (deviator), Anton Akzhigitov (Akzwar)>
5 
6     Permission is hereby granted, free of charge, to any person obtaining a copy
7     of this software and associated documentation files (the "Software"), to deal
8     in the Software without restriction, including without limitation the rights
9     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10     copies of the Software, and to permit persons to whom the Software is
11     furnished to do so, subject to the following conditions:
12 
13     The above copyright notice and this permission notice shall be included in
14     all copies or substantial portions of the Software.
15 
16     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22     THE SOFTWARE.
23 +/
24 
25 module desgui.core.label;
26 
27 import desgui.core.widget;
28 import desgui.core.textrect;
29 
30 class DiLabelException: DiException 
31 { 
32     @safe pure nothrow this( string msg, string file=__FILE__, size_t line=__LINE__ )
33     { super( msg, file, line ); } 
34 }
35 
36 class DiLabel: DiWidget
37 {
38 protected:
39     DiTextRect textrect;
40 
41     DiGlyphRender glyphRender;
42     DiTextRender textRender;
43 
44     void repos()
45     {
46         int hoffset = 0;
47         if( textalign != TextAlign.LEFT )
48         {
49             int sum = textrect.glyph.next.x;
50             hoffset = ( textalign == TextAlign.RIGHT ) ? 
51                 rect.w - sum :
52                 (rect.w - sum) / 2;
53         }
54         textrect.pos = ivec2( hoffset, rect.h * baselineCoef );
55     }
56 
57     final void updateRenders()
58     { textrect.setRenders( textRender, glyphRender ); repos(); }
59 
60     TextAlign textalign = TextAlign.LEFT;
61 
62     float heightCoef = 0.7;
63     float baselineCoef = 0.8;
64 
65     ivec2 oldsize;
66 
67 public:
68 
69     enum TextAlign { LEFT, CENTER, RIGHT };
70 
71     this( DiWidget par, in irect rr, wstring str="" )
72     {
73         super( par );
74         textRender = new DiBaseLineTextRender;
75         glyphRender = ctx.baseGlyphRender();
76         textrect = new DiTextRect( textRender, glyphRender, ctx.draw.rect() );
77 
78         draw.connect({ textrect.draw(); });
79 
80         reshape.connect( (r)
81         { 
82             if( r.size.x == oldsize.x && r.size.y == oldsize.y ) return;
83             DiGlyphParam p = textrect.param;
84             p.height = cast(uint)( rect.h * heightCoef );
85             textrect.param = p;
86             repos();
87             oldsize = r.size;
88         });
89 
90         processEventMask = 0;
91 
92         textrect.text = str;
93         reshape( rr );
94     }
95 
96     @property 
97     {
98         void textAlign( TextAlign ta ) { textalign = ta; repos(); }
99         TextAlign textAlign() const { return textalign; }
100 
101         void text( wstring str ) { textrect.text = str; repos(); }
102         wstring text() const { return textrect.text; }
103 
104         void color( in col4 clr ) 
105         { 
106             if( textrect.param.color == clr ) return;
107             DiGlyphParam buf = textrect.param;
108             buf.color = clr;
109             textrect.param = buf;
110             repos();
111         }
112         col4 color() const { return textrect.param.color; }
113     }
114 
115     void setGlyphRender( DiGlyphRender gr )
116     {
117         if( glyphRender == gr ) return;
118         glyphRender = gr;
119         updateRenders();
120     }
121 
122     void setTextRender( DiTextRender tr )
123     {
124         if( textRender == tr ) return;
125         textRender = tr;
126         updateRenders();
127     }
128 }