void _drawAxis(QPainter *p) //画坐标轴
{
QPointF xNegative(-100,0);
QPointF xPositive(100,0);
QPointF yNegative(0,-100);
QPointF yPositive(0,100);
p->setPen(Qt::darkMagenta);
p->drawLine(xNegative,xPositive);
p->drawLine(yNegative,yPositive);
_drawArrow(p,xNegative,xPositive);
_drawArrow(p,yNegative,yPositive);
QPen pen(Qt::darkRed);
pen.setWidth(5);
p->setPen(pen);
p->drawPoint(QPointF(0,0));
}
void _drawPolygon(QPainter *p, const QPolygonF &polygon) //画QPolygonF
{
//temp
p->drawPolygon(polygon);
QPointF A=polygon.operator [](polygon.size()-2);
QPointF B=polygon.operator [](polygon.size()-1);
_drawArrow(p,A,B);
//下面是强调起点的标志
QPen pen(Qt::darkYellow);
pen.setWidth(4);
p->setPen(pen);
p->drawPoint(polygon.front());
}
void
Clock::Draw(BView *view, int32)
{
BScreen screenView;
BBitmap bufferBitmap(view->Bounds(), screenView.ColorSpace(), true);
BView offscreenView(view->Bounds(), NULL, 0, 0);
bufferBitmap.AddChild(&offscreenView);
bufferBitmap.Lock();
float width = view->Bounds().Width();
float height = view->Bounds().Height();
float zoom = (height / 1024.0) * 0.65;
time_t timeInfo;
time(&timeInfo);
struct tm *nowTime = localtime(&timeInfo);
float secondVal = nowTime->tm_sec;
float minuteVal = nowTime->tm_min + (secondVal / 60.0);
float hourVal = nowTime->tm_hour + (minuteVal / 60.0);
offscreenView.SetHighColor(0, 0, 0);
offscreenView.SetLowColor(0, 0, 0);
offscreenView.FillRect(offscreenView.Bounds());
offscreenView.SetHighColor(200, 200, 200);
centerX = width / 2.0;
centerY = height / 2.0;
float markAngle = 0;
float markRadius = 510.0 * zoom;
for(int mark = 0; mark < 60; mark++, markAngle += (2 * M_PI) / 60) {
float x = centerX + markRadius * cos(markAngle);
float y = centerY + markRadius * sin(markAngle);
_drawBlock(&offscreenView, x, y, markAngle, 14.0 * zoom);
}
offscreenView.SetHighColor(255, 255, 255);
markAngle = 0;
markRadius = 500.0 * zoom;
for (int mark = 0; mark < 12; mark++, markAngle += (2 * M_PI) / 12) {
float x = centerX + markRadius * cos(markAngle);
float y = centerY + markRadius * sin(markAngle);
_drawBlock(&offscreenView, x, y, markAngle, 32 * zoom);
}
offscreenView.SetHighColor(255, 255, 255);
_drawArrow(&offscreenView, centerX, centerY,
((2 * M_PI / 60) * minuteVal) - (M_PI / 2), 220 * zoom, 1, 8 * zoom);
_drawArrow(&offscreenView, centerX, centerY,
((2 * M_PI / 12) * hourVal) - (M_PI / 2), 140 * zoom, 1, 14 * zoom);
offscreenView.FillEllipse(BPoint(centerX, centerY),
24 * zoom, 24 * zoom);
offscreenView.SetHighColor(250, 20, 20);
_drawArrow(&offscreenView, centerX, centerY,
((2 * M_PI / 60) * secondVal) - (M_PI / 2), 240 * zoom, 1, 4 * zoom);
offscreenView.FillEllipse(BPoint(centerX, centerY),
20 * zoom, 20 * zoom);
offscreenView.Sync();
bufferBitmap.Unlock();
view->DrawBitmap(&bufferBitmap);
bufferBitmap.RemoveChild(&offscreenView);
}