dguihub.scrollbar 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 dguihub.scrollbar;
10 
11 import dguihub.core.controls.control; //?? Control ??
12 import dguihub.core.winapi;
13 
14 enum ScrollBarType {
15    vertical = SB_VERT,
16    horizontal = SB_HORZ,
17    separate = SB_CTL,
18 }
19 
20 class ScrollBar : Control {
21    private ScrollBarType _sbt;
22 
23    public this() {
24       this._sbt = ScrollBarType.separate;
25    }
26 
27    private this(Control c, ScrollBarType sbt) {
28       this._handle = c.handle;
29       this._sbt = sbt;
30    }
31 
32    private void setInfo(uint mask, SCROLLINFO* si) {
33       si.cbSize = SCROLLINFO.sizeof;
34       si.fMask = mask | SIF_DISABLENOSCROLL;
35 
36       SetScrollInfo(this._handle, this._sbt, si, true);
37    }
38 
39    private void getInfo(uint mask, SCROLLINFO* si) {
40       si.cbSize = SCROLLINFO.sizeof;
41       si.fMask = mask;
42 
43       GetScrollInfo(this._handle, this._sbt, si);
44    }
45 
46    public void setRange(uint min, uint max) {
47       if (this.created) {
48          SCROLLINFO si;
49          si.nMin = min;
50          si.nMax = max;
51 
52          this.setInfo(SIF_RANGE, &si);
53       }
54    }
55 
56    public void increment(int amount = 1) {
57       this.position = this.position + amount;
58    }
59 
60    public void decrement(int amount = 1) {
61       this.position = this.position - amount;
62    }
63 
64    @property public uint minRange() {
65       if (this.created) {
66          SCROLLINFO si;
67 
68          this.getInfo(SIF_RANGE, &si);
69          return si.nMin;
70       }
71 
72       return -1;
73    }
74 
75    @property public uint maxRange() {
76       if (this.created) {
77          SCROLLINFO si;
78 
79          this.getInfo(SIF_RANGE, &si);
80          return si.nMax;
81       }
82 
83       return -1;
84    }
85 
86    @property public uint position() {
87       if (this.created) {
88          SCROLLINFO si;
89 
90          this.getInfo(SIF_POS, &si);
91          return si.nPos;
92       }
93 
94       return -1;
95    }
96 
97    @property public void position(uint p) {
98       if (this.created) {
99          SCROLLINFO si;
100          si.nPos = p;
101 
102          this.setInfo(SIF_POS, &si);
103       }
104    }
105 
106    @property public uint page() {
107       if (this.created) {
108          SCROLLINFO si;
109 
110          this.getInfo(SIF_PAGE, &si);
111          return si.nPage;
112       }
113 
114       return -1;
115    }
116 
117    @property public void page(uint p) {
118       if (this.created) {
119          SCROLLINFO si;
120          si.nPage = p;
121 
122          this.setInfo(SIF_PAGE, &si);
123       }
124    }
125 
126    public static ScrollBar fromControl(Control c, ScrollBarType sbt) {
127       assert(sbt !is ScrollBarType.separate, "ScrollBarType.separate not allowed here");
128       return new ScrollBar(c, sbt);
129    }
130 }