1 // Copyright Vladimir Prus 2004.
2 // Distributed under the Boost Software License, Version 1.0.
3 // (See accompanying file LICENSE_1_0.txt
4 // or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6 #include "canvas.h"
7
8 #include <qlabel.h>
9 #include <qcanvas.h>
10 #include <qlayout.h>
11
Canvas(QWidget * parent)12 Canvas::Canvas(QWidget* parent)
13 : QWidget(parent)
14 {
15 m_pen = QPen(QColor(255, 128, 128));
16 m_brushes = new QBrush[2];
17 m_brushes[0] = QBrush(QColor(255, 0, 0));
18 m_brushes[1] = QBrush(QColor(0, 255, 0));
19 m_current_brush = 0;
20
21 m_canvas = new QCanvas(this);
22 m_canvas->resize(4*1600, 600);
23
24 redraw();
25
26 QVBoxLayout* l = new QVBoxLayout(this);
27
28 m_canvas_view = new QCanvasView(m_canvas, this);
29 l->addWidget(m_canvas_view);
30 m_canvas_view->resize(rect().size());
31 m_canvas_view->show();
32 }
33
~Canvas()34 Canvas::~Canvas()
35 {
36 delete m_brushes;
37 }
38
redraw()39 void Canvas::redraw()
40 {
41 QCanvasItemList l = m_canvas->allItems();
42 for(QCanvasItemList::iterator i = l.begin(),
43 e = l.end(); i != e; ++i)
44 {
45 delete *i;
46 }
47
48 unsigned count = 0;
49 for (unsigned x = 10; x < 4*1600; x += 20)
50 for (unsigned y = 10; y < 600; y += 20) {
51 QCanvasRectangle* r = new QCanvasRectangle(x, y, 10, 10, m_canvas);
52 r->setPen(m_pen);
53 r->setBrush(m_brushes[m_current_brush]);
54 r->show();
55 ++count;
56 QCanvasText* t = new QCanvasText("D", m_canvas);
57 t->move(x, y);
58 t->show();
59 ++count;
60 }
61
62 (new QCanvasText(QString::number(count), m_canvas))->show();
63 m_canvas->setAllChanged();
64
65 }
66
change_color()67 void Canvas::change_color()
68 {
69 m_current_brush = (m_current_brush + 1)%2;
70 redraw();
71 m_canvas->update();
72 }
73
74