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Bug: http://b.android.com/65503 Change-Id: I6ed901703cffee345f3083ea3ddeb52a28f4ac64
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tools/layoutlib/bridge/src/android/graphics/drawable/GradientDrawable_Delegate.java
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/* | ||
* Copyright (C) 2015 The Android Open Source Project | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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package android.graphics.drawable; | ||
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import com.android.tools.layoutlib.annotations.LayoutlibDelegate; | ||
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import android.graphics.Path; | ||
import android.graphics.drawable.GradientDrawable.GradientState; | ||
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import java.lang.reflect.Field; | ||
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/** | ||
* Delegate implementing the native methods of {@link GradientDrawable} | ||
* | ||
* Through the layoutlib_create tool, the original native methods of GradientDrawable have been | ||
* replaced by calls to methods of the same name in this delegate class. | ||
*/ | ||
public class GradientDrawable_Delegate { | ||
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/** | ||
* The ring can be built either by drawing full circles, or by drawing arcs in case the | ||
* circle isn't complete. LayoutLib cannot handle drawing full circles (requires path | ||
* subtraction). So, if we need to draw full circles, we switch to drawing 99% circle. | ||
*/ | ||
@LayoutlibDelegate | ||
/*package*/ static Path buildRing(GradientDrawable thisDrawable, GradientState st) { | ||
boolean useLevel = st.mUseLevelForShape; | ||
int level = thisDrawable.getLevel(); | ||
// 10000 is the max level. See android.graphics.drawable.Drawable#getLevel() | ||
float sweep = useLevel ? (360.0f * level / 10000.0f) : 360f; | ||
Field mLevel = null; | ||
if (sweep >= 360 || sweep <= -360) { | ||
st.mUseLevelForShape = true; | ||
// Use reflection to set the value of the field to prevent setting the drawable to | ||
// dirty again. | ||
try { | ||
mLevel = Drawable.class.getDeclaredField("mLevel"); | ||
mLevel.setAccessible(true); | ||
mLevel.setInt(thisDrawable, 9999); // set to one less than max. | ||
} catch (NoSuchFieldException e) { | ||
// The field has been removed in a recent framework change. Fall back to old | ||
// buggy behaviour. | ||
} catch (IllegalAccessException e) { | ||
// We've already set the field to be accessible. | ||
assert false; | ||
} | ||
} | ||
Path path = thisDrawable.buildRing_Original(st); | ||
st.mUseLevelForShape = useLevel; | ||
if (mLevel != null) { | ||
try { | ||
mLevel.setInt(thisDrawable, level); | ||
} catch (IllegalAccessException e) { | ||
assert false; | ||
} | ||
} | ||
return path; | ||
} | ||
} |
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