GiTransformImpl(bool _ydown)
: cxWnd(1), cyWnd(1), dpiX(96), dpiY(96), ydown(_ydown), viewScale(1)
, zoomEnabled(true), tmpViewScale(1.f), zoomTimes(0)
{
minViewScale = 0.01f; // 最小显示比例为1%
maxViewScale = 5.f; // 最大显示比例为500%
rectLimitsW.set(Point2d::kOrigin(), 2e5f, 2e5f);
updateTransforms();
}
void mgnear::moveRectHandle(Box2d& rect, int index,
const Point2d& pt, bool lockCornerScale)
{
Point2d pts[4];
for (int i = 0; i < 4; i++)
mgnear::getRectHandle(rect, index / 4 * 4 + i, pts[i]);
pts[index % 4] = pt;
if (index >= 0 && index < 4)
{
Point2d pt1(pt);
if (lockCornerScale && !rect.isEmpty()) {
Point2d& pt2 = pts[(index + 2) % 4];
float w = fabsf(pt2.x - pt.x);
float h = fabsf(pt2.y - pt.y);
if (w * rect.height() > h * rect.width())
h = w * rect.height() / rect.width();
else
w = h * rect.width() / rect.height();
pt1.x = pt2.x + w * (pt2.x > pt.x ? -1.f : 1.f);
pt1.y = pt2.y + h * (pt2.y > pt.y ? -1.f : 1.f);
}
if (index % 2 == 0)
{
pts[(index + 1) % 4].y = pt1.y;
pts[(index + 3) % 4].x = pt1.x;
}
else
{
pts[(index + 1) % 4].x = pt1.x;
pts[(index + 3) % 4].y = pt1.y;
}
rect.set(4, pts);
}
else if (index >= 4 && index < 8)
{
rect.set(pts[3].x, pts[2].y, pts[1].x, pts[0].y);
}
}