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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.
*/
package android.graphics.drawable;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import android.graphics.Path;
import android.graphics.drawable.GradientDrawable.GradientState;
import java.lang.reflect.Field;
/**
* 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 {
/**
* 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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