-
Notifications
You must be signed in to change notification settings - Fork 1
/
gestureeditorcanvas.cpp
250 lines (220 loc) · 6.71 KB
/
gestureeditorcanvas.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
#include "gestureeditorcanvas.h"
#include <QPainter>
using namespace Gesture;
class GestureEditorCanvas::Private
{
public:
unsigned state;
DirectionList activeDirections;
QPoint mousePos; //current position of mouse cursor
QPoint mouseStart; //begining of drawing
QPoint pathFinish; //finish of path
static const unsigned step = 50; //size of step in drawing gesture
static const unsigned diff = 3; //max difference while drawing
};
GestureEditorCanvas::GestureEditorCanvas(GestureEditor *parent)
: QWidget(parent), d(new Private)
{
d->state = Idle;
//drawing white background
QPalette pal = palette();
pal.setColor(QPalette::Background,QColor(Qt::white));
setPalette(pal);
setAutoFillBackground(true);
}
GestureEditorCanvas::~GestureEditorCanvas()
{
delete d;
}
bool GestureEditorCanvas::isBlock(QPoint a, QPoint b)
{
int xx,yy;
xx = b.x() - a.x();
yy = b.y() - a.y();
//qDebug() << "x:" << xx << "y:" << yy;
//check direction - cant be the same as last element
if(!d->activeDirections.empty())
switch(d->activeDirections.last())
{
case Up:
if( abs(yy) >= d->step && yy < 0)
return false;
break;
case Down:
if( abs(yy) >= d->step && yy > 0 )
return false;
break;
case Right:
if( abs(xx) >= d->step && xx > 0)
return false;
break;
case Left:
if( abs(xx) >= d->step && xx < 0)
return false;
break;
}
//check length
xx = abs(xx);
yy = abs(yy);
return ((( xx >= d->step && yy <= d->diff ) || ( yy >= d->step && xx <= d->diff ))?true:false);
}
void GestureEditorCanvas::paintEvent(QPaintEvent* )
{
QPainter painter(this);
QPen pen;
if(d->state == Drawing)
{
//check, if line seems as finished block
if(isBlock(d->mouseStart,d->mousePos))
{
pen.setColor(QColor(215, 0, 25, 64)); // Transparent red
pen.setWidth(8);
}
else
{
pen.setColor(QColor(25, 0, 215, 64)); //transparent blue
pen.setWidth(6);
}
painter.setPen(pen);
painter.drawPoint(d->mouseStart);
painter.drawLine(d->mouseStart,d->mousePos);
}
//qDebug()<<"count:"<<d->activeDirections.count();
int curX = 0, curY = 0;
//setting the picture into the center
int maxX = 0, minX = 0, maxY = 0, minY = 0;
for(int i = 0; i< d->activeDirections.count(); i++)
{
switch(d->activeDirections[i])
{
case Up:
curY--;
break;
case Down:
curY++;
break;
case Left:
curX--;
break;
case Right:
curX++;
break;
}
if(curY < minY)
minY--;
if(curY > maxY)
maxY++;
if(curX < minX)
minX--;
if(curX > maxX)
maxX++;
}
curX = width()/2 - (maxX + minX) * (d->step/2);
curY = height()/2 - (maxY + minY) * (d->step/2);
pen.setWidth(8);
pen.setColor(QColor(25,0,215, 64)); // Transparent blue
painter.setPen(pen);
painter.drawLine(curX+10,curY+10,curX-10,curY-10);
painter.drawLine(curX+10,curY-10,curX-10,curY+10);
pen.setColor(QColor(215, 0, 25, 64)); // Transparent red
painter.setPen(pen);
//drawing arrows
for(int i = 0; i< d->activeDirections.count(); i++)
{
switch(d->activeDirections[i])
{
case Up:
painter.drawLine(curX,curY,curX,curY-d->step);
curY-=d->step;
painter.drawLine(curX,curY,curX+10,curY+10);
painter.drawLine(curX,curY,curX-10,curY+10);
break;
case Down:
painter.drawLine(curX,curY,curX,curY+d->step);
curY+=d->step;
painter.drawLine(curX,curY,curX+10,curY-10);
painter.drawLine(curX,curY,curX-10,curY-10);
break;
case Left:
painter.drawLine(curX-d->step,curY,curX,curY);
curX-=d->step;
painter.drawLine(curX,curY,curX+10,curY+10);
painter.drawLine(curX,curY,curX+10,curY-10);
break;
case Right:
painter.drawLine(curX+d->step,curY,curX,curY);
curX+=d->step;
painter.drawLine(curX,curY,curX-10,curY+10);
painter.drawLine(curX,curY,curX-10,curY-10);
break;
}
}
d->pathFinish.setX(curX);
d->pathFinish.setY(curY);
}
void GestureEditorCanvas::mousePressEvent(QMouseEvent *event)
{
//check for left mouse button
if(event->button() == Qt::LeftButton)
{
//set starting position end of last drawing
d->mouseStart = d->pathFinish;
d->mousePos = event->pos();
d->state = Drawing;
update();
}
QWidget::mousePressEvent(event);
}
void GestureEditorCanvas::mouseMoveEvent(QMouseEvent *event)
{
//check state and set current mouse position
if(d->state == Drawing)
{
d->mousePos = event->pos();
update();
}
else
{
//change appereance of cursor
if(abs(event->pos().x() - d->pathFinish.x()) < 10 && abs(event->pos().y() - d->pathFinish.y()) < 10)
setCursor(Qt::PointingHandCursor);
else
setCursor(Qt::ArrowCursor);
update();
}
QWidget::mouseMoveEvent(event);
}
void GestureEditorCanvas::mouseReleaseEvent(QMouseEvent *event)
{
//check state and check, if suitable for saving
if(d->state == Drawing )
{
d->state = Idle;
if(isBlock(d->mouseStart, d->mousePos))
{
int xx,yy;
xx = d->mousePos.x() - d->mouseStart.x();
yy = d->mousePos.y() - d->mouseStart.y();
if( abs(xx) > d->step && xx > 0)
d->activeDirections<<Right;
else if( abs(xx) > d->step)
d->activeDirections<<Left;
else if( abs(yy) > d->step && yy > 0)
d->activeDirections<<Down;
else
d->activeDirections<<Up;
}
update();
}
QWidget::mouseReleaseEvent(event);
}
DirectionList GestureEditorCanvas::getDirections()
{
return d->activeDirections;
}
void GestureEditorCanvas::setDirections(DirectionList dl)
{
d->activeDirections = dl;
update();
}
#include "gestureeditorcanvas.moc"