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MD_Parola_Slice.cpp
1 /*
2 MD_Parola - Library for modular scrolling text and Effects
3
4 See header file for comments
5 This file contains implements slice text display
6
7 Copyright (C) 2013 Marco Colli. All rights reserved.
8
9 This library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 This library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with this library; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #include <MD_Parola.h>
25 #include <MD_Parola_lib.h>
26
27 void MD_Parola::effectSlice(bool bIn)
28 {
29 static int16_t nextColumn, animColumn;
30
31 if (bIn)
32 {
33 switch(_fsmState)
34 {
35 case INITIALISE:
36 case GET_FIRST_CHAR:
37 PRINT_STATE("I SLICE");
38
39 if ((_charCols = getFirstChar()) == 0)
40 {
41 _fsmState = END;
42 break;
43 }
44 displayClear();
45 _countCols = 0;
46 animColumn = 0;
47 nextColumn = _limitLeft;
48
49 _fsmState = PUT_CHAR;
50 break;
51
52 case GET_NEXT_CHAR: // Load the next character from the font table
53 PRINT_STATE("I SLICE");
54 // have we reached the end of the characters string?
55 if ((_charCols = getNextChar()) == 0)
56 {
57 _fsmState = PAUSE;
58 break;
59 }
60 _countCols = 0;
61 _fsmState = PUT_CHAR;
62 // !! fall through to next state to start displaying
63
64 case PUT_CHAR: // display the next part of the character
65 PRINT_STATE("I SLICE");
66 FSMPRINT(" - Next ", nextColumn);
67 FSMPRINT(", anim ", animColumn);
68
69 if (_cBuf[_countCols] == 0)
70 {
71 animColumn = nextColumn; // pretend we just animated it!
72 }
73 else
74 {
75 // clear the column and animate the next one
76 if (animColumn != nextColumn) _D.setColumn(animColumn, 0);
77 animColumn++;
78 _D.setColumn(animColumn, _cBuf[_countCols]);
79 }
80
81 // set up for the next time
82 if (animColumn == nextColumn)
83 {
84 animColumn = 0;
85 _countCols++;
86 nextColumn--;
87 }
88 if (_countCols == _charCols) _fsmState = GET_NEXT_CHAR;
89 break;
90
91 default:
92 _fsmState = PAUSE;
93 }
94 }
95 else // exiting
96 {
97 switch(_fsmState)
98 {
99 case PAUSE:
100 PRINT_STATE("O SLICE");
101 animColumn = nextColumn = _limitLeft;
102 _fsmState = PUT_CHAR;
103 // fall through
104
105 case GET_FIRST_CHAR:
106 case GET_NEXT_CHAR:
107 case PUT_CHAR:
108 PRINT_STATE("O SLICE");
109 FSMPRINT(" - Next ", nextColumn);
110 FSMPRINT(", anim ", animColumn);
111
112 if (_D.getColumn(animColumn) == 0)
113 {
114 animColumn = _D.getColumnCount(); // pretend we just animated it!
115 }
116 else
117 {
118 // Move the column over
119 _D.setColumn(animColumn+1, _D.getColumn(animColumn));
120 _D.setColumn(animColumn, 0);
121 animColumn++;
122 }
123
124 // set up for the next time
125 if (animColumn == _D.getColumnCount()) animColumn = nextColumn--;
126
127 if (nextColumn < _limitRight) _fsmState = END; //reached the end
128 break;
129
130 default:
131 _fsmState = END;
132 }
133 }
134 }