bool GcBaseView::twoFingersMove(const MgMotion& motion)
{
if (!_zoomEnabled) {
return false;
}
if (motion.gestureState <= kMgGestureBegan) {
_lastScale = xform()->getZoomValue(_lastCenter);
}
else if (motion.gestureState == kMgGestureMoved
&& motion.startPt != motion.startPt2
&& motion.point != motion.point2) { // 双指变单指则忽略移动
Point2d at((motion.startPt + motion.startPt2) / 2);
Point2d pt((motion.point + motion.point2) / 2);
float d1 = motion.point.distanceTo(motion.point2);
float d0 = motion.startPt.distanceTo(motion.startPt2);
float scale = d1 / d0;
xform()->zoom(_lastCenter, _lastScale); // 先恢复
xform()->zoomByFactor(scale - 1, &at); // 以起始点为中心放缩显示
xform()->zoomPan(pt.x - at.x, pt.y - at.y); // 平移到当前点
_zooming = true;
cmdView()->regenAll(false);
}
else if (_zooming) {
_zooming = false;
cmdView()->regenAll(false);
}
return true;
}
void GcGraphView::draw(GiGraphics& gs)
{
int gridType = cmdView()->getOptionInt("showGrid", 0);
if (gridType < 1 || gridType > 2 || gs.xf().getViewScale() < 0.05f)
return;
Box2d rect(gs.xf().getWndRectW());
GiContext ctx(0, GiColor(127, 127, 127, gridType == 2 ? 48 : 20));
if (gridType == 1) {
GiContext ctx5(0, GiColor(127, 127, 127, 48));
float x = mgbase::roundReal(rect.xmin, -1) - 10;
float y = mgbase::roundReal(rect.ymin, -1) - 10;
int i = mgRound(x) / 10;
for (; x < rect.xmax + 10; x += 10) {
gs.drawLine(i++ % 5 ? &ctx : &ctx5, Point2d(x, rect.ymin), Point2d(x, rect.ymax), false);
}
i = mgRound(y) / 10;
for (; y < rect.ymax + 10; y += 10) {
gs.drawLine(i++ % 5 ? &ctx : &ctx5, Point2d(rect.xmin, y), Point2d(rect.xmax, y), false);
}
}
else if (gridType == 2) {
for (float x = rect.xmin - 10; x < rect.xmax + 10; x += 10) {
for (float y = rect.ymin - 10; y < rect.ymax + 10; y += 10) {
gs.drawLine(&ctx, Point2d(x, y - 0.5f), Point2d(x, y + 0.5f), false);
gs.drawLine(&ctx, Point2d(x - 0.5f, y), Point2d(x + 0.5f, y), false);
}
}
}
GcBaseView::draw(gs);
}
bool GcBaseView::onGesture(const MgMotion& motion)
{
if (motion.gestureType != kGiGesturePan || !_zoomEnabled){
return false;
}
if (motion.gestureState <= kMgGestureBegan) {
_lastScale = xform()->getZoomValue(_lastCenter);
}
else if (motion.gestureState == kMgGestureMoved) {
Vector2d vec(motion.point - motion.startPt);
xform()->zoom(_lastCenter, _lastScale); // 先恢复
xform()->zoomPan(vec.x, vec.y); // 平移到当前点
_zooming = true;
cmdView()->regenAll(false);
}
else if (_zooming) {
_zooming = false;
cmdView()->regenAll(false);
}
return true;
}
MgShapeDoc* GcBaseView::doc()
{
return cmdView()->document()->doc();
}
