本文整理汇总了C++中FrameMetrics::GetZoom方法的典型用法代码示例。如果您正苦于以下问题：C++ FrameMetrics::GetZoom方法的具体用法？C++ FrameMetrics::GetZoom怎么用？C++ FrameMetrics::GetZoom使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FrameMetrics的用法示例。
在下文中一共展示了FrameMetrics::GetZoom方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: GetPinchableFrameMetrics
TEST_F(APZCGestureDetectorTester, Pan_After_Pinch) {
SCOPED_GFX_PREF(TouchActionEnabled, bool, false);
FrameMetrics originalMetrics = GetPinchableFrameMetrics();
apzc->SetFrameMetrics(originalMetrics);
MakeApzcZoomable();
// Test parameters
float zoomAmount = 1.25;
float pinchLength = 100.0;
float pinchLengthScaled = pinchLength * zoomAmount;
int focusX = 250;
int focusY = 300;
int panDistance = 20;
int firstFingerId = 0;
int secondFingerId = firstFingerId + 1;
// Put fingers down
MultiTouchInput mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_START, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX, focusY));
mti.mTouches.AppendElement(CreateSingleTouchData(secondFingerId, focusX, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// Spread fingers out to enter the pinch state
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX - pinchLength, focusY));
mti.mTouches.AppendElement(CreateSingleTouchData(secondFingerId, focusX + pinchLength, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// Do the actual pinch of 1.25x
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX - pinchLengthScaled, focusY));
mti.mTouches.AppendElement(CreateSingleTouchData(secondFingerId, focusX + pinchLengthScaled, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// Verify that the zoom changed, just to make sure our code above did what it
// was supposed to.
FrameMetrics zoomedMetrics = apzc->GetFrameMetrics();
float newZoom = zoomedMetrics.GetZoom().ToScaleFactor().scale;
EXPECT_EQ(originalMetrics.GetZoom().ToScaleFactor().scale * zoomAmount, newZoom);
// Now we lift one finger...
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(secondFingerId, focusX + pinchLengthScaled, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// ... and pan with the remaining finger. This pan just breaks through the
// distance threshold.
focusY += 40;
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX - pinchLengthScaled, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// This one does an actual pan of 20 pixels
focusY += panDistance;
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX - pinchLengthScaled, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// Lift the remaining finger
mti = MultiTouchInput(MultiTouchInput::MULTITOUCH_END, 0, TimeStamp(), 0);
mti.mTouches.AppendElement(CreateSingleTouchData(firstFingerId, focusX - pinchLengthScaled, focusY));
apzc->ReceiveInputEvent(mti, nullptr);
// Verify that we scrolled
FrameMetrics finalMetrics = apzc->GetFrameMetrics();
EXPECT_EQ(zoomedMetrics.GetScrollOffset().y - (panDistance / newZoom), finalMetrics.GetScrollOffset().y);
// Clear out any remaining fling animation and pending tasks
apzc->AdvanceAnimationsUntilEnd();
while (mcc->RunThroughDelayedTasks());
apzc->AssertStateIsReset();
}