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/*******************************************************************************
 * Copyright 2019 See AUTHORS file
 *
 * 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 org.mini2Dx.ui.element;

import org.mini2Dx.core.exception.MdxException;
import org.mini2Dx.core.serialization.annotation.ConstructorArg;
import org.mini2Dx.core.serialization.annotation.Field;
import org.mini2Dx.ui.UiContainer;
import org.mini2Dx.ui.layout.FlexLayoutRuleset;
import org.mini2Dx.ui.layout.ScreenSize;
import org.mini2Dx.ui.render.ParentRenderNode;
import org.mini2Dx.ui.render.ProgressBarRenderNode;
import org.mini2Dx.ui.render.UiContainerRenderTree;
import org.mini2Dx.ui.style.StyleRule;

/**
 * Implements a progress/loading bar
 */
public class ProgressBar extends UiElement implements FlexUiElement {
	@Field(optional=true)
	private float min;
	@Field(optional=true)
	private float max;
	@Field(optional=true)
	private float value;
	@Field(optional=true)
	private String flexLayout = null;
	
	protected ProgressBarRenderNode renderNode;
	
	public ProgressBar() {
		this(null);
	}
	
	public ProgressBar(@ConstructorArg(clazz = String.class, name = "id") String id) {
		this(id, 0f, 0f, 300f, 64f);
	}

	/**
	 * Constructor
	 * @param x The x coordinate of this element relative to its parent
	 * @param y The y coordinate of this element relative to its parent
	 * @param width The width of this element
	 * @param height The height of this element
	 */
	public ProgressBar(@ConstructorArg(clazz = Float.class, name = "x") float x,
						   @ConstructorArg(clazz = Float.class, name = "y") float y,
						   @ConstructorArg(clazz = Float.class, name = "width") float width,
						   @ConstructorArg(clazz = Float.class, name = "height") float height) {
		this(null, x, y, width, height);
	}

	/**
	 * Constructor
	 * @param id The unique ID for this element (if null an ID will be generated)
	 * @param x The x coordinate of this element relative to its parent
	 * @param y The y coordinate of this element relative to its parent
	 * @param width The width of this element
	 * @param height The height of this element
	 */
	public ProgressBar(@ConstructorArg(clazz = String.class, name = "id") String id,
				   @ConstructorArg(clazz = Float.class, name = "x") float x,
				   @ConstructorArg(clazz = Float.class, name = "y") float y,
				   @ConstructorArg(clazz = Float.class, name = "width") float width,
				   @ConstructorArg(clazz = Float.class, name = "height") float height) {
		super(id, x, y, width, height);
		max = 1f;
	}
	
	@Override
	public void syncWithUpdate(UiContainerRenderTree rootNode) {
		while (effects.size > 0) {
			renderNode.applyEffect(effects.removeFirst());
		}
		super.syncWithUpdate(rootNode);
	}

	@Override
	public void attach(ParentRenderNode parentRenderNode) {
		if (renderNode != null) {
			return;
		}
		renderNode = new ProgressBarRenderNode(parentRenderNode, this);
		parentRenderNode.addChild(renderNode);
	}

	@Override
	public void detach(ParentRenderNode parentRenderNode) {
		if (renderNode == null) {
			return;
		}
		parentRenderNode.removeChild(renderNode);
		renderNode = null;
	}

	@Override
	public void invokeBeginHover() {
		if(renderNode == null) {
			return;
		}
		renderNode.beginFakeHover();
	}

	@Override
	public void invokeEndHover() {
		if(renderNode == null) {
			return;
		}
		renderNode.endFakeHover();
	}

	@Override
	public void setVisibility(Visibility visibility) {
		if (this.visibility == visibility) {
			return;
		}
		this.visibility = visibility;

		if (renderNode == null) {
			return;
		}
		renderNode.setDirty();
	}

	@Override
	public void setStyleId(String styleId) {
		if (styleId == null) {
			return;
		}
		if (this.styleId.equals(styleId)) {
			return;
		}
		this.styleId = styleId;

		if (renderNode == null) {
			return;
		}
		renderNode.setDirty();
	}

	@Override
	public void setZIndex(int zIndex) {
		this.zIndex = zIndex;

		if (renderNode == null) {
			return;
		}
		renderNode.setDirty();
	}

	@Override
	public StyleRule getStyleRule() {
		if(!UiContainer.isThemeApplied()) {
			return null;
		}
		return UiContainer.getTheme().getProgressBarStyleRule(styleId, ScreenSize.XS);
	}

	public String getFlexLayout() {
		return flexLayout;
	}

	public void setFlexLayout(String flexLayout) {
		if(flexLayout == null) {
			return;
		}
		if(this.flexLayout != null && this.flexLayout.equals(flexLayout)) {
			return;
		}
		this.flexLayout = flexLayout;

		if (renderNode == null) {
			return;
		}
		renderNode.setDirty();
	}

	public float getMin() {
		return min;
	}

	public void setMin(float min) {
		if(min >= max) {
			throw new MdxException("Min must be less than max");
		}
		this.min = min;
		if(value < min) {
			value = min;
		}
		if(renderNode == null) {
			return;
		}
		renderNode.updateFillWidth();
	}

	public float getMax() {
		return max;
	}

	public void setMax(float max) {
		if(max <= min) {
			throw new MdxException("Max must be greater than min");
		}
		this.max = max;
		if(value > max) {
			value = max;
		}
		if(renderNode == null) {
			return;
		}
		renderNode.updateFillWidth();
	}

	public float getValue() {
		return value;
	}

	public void setValue(float value) {
		if(value < min) {
			value = min;
		} else if(value > max) {
			value = max;
		}
		this.value = value;
		if(renderNode == null) {
			return;
		}
		renderNode.updateFillWidth();
	}

	@Override
	public boolean isRenderNodeDirty() {
		if (renderNode == null) {
			return true;
		}
		return renderNode.isDirty();
	}

	@Override
	public void setRenderNodeDirty() {
		if (renderNode == null) {
			return;
		}
		renderNode.setDirty();
	}

	@Override
	public boolean isInitialLayoutOccurred() {
		if (renderNode == null) {
			return false;
		}
		return renderNode.isInitialLayoutOccurred();
	}

	@Override
	public boolean isInitialUpdateOccurred() {
		if(renderNode == null) {
			return false;
		}
		return renderNode.isInitialUpdateOccurred();
	}

	@Override
	public int getRenderX() {
		if(renderNode == null) {
			return Integer.MIN_VALUE;
		}
		return renderNode.getOuterRenderX();
	}

	@Override
	public int getRenderY() {
		if(renderNode == null) {
			return Integer.MIN_VALUE;
		}
		return renderNode.getOuterRenderY();
	}

	@Override
	public int getRenderWidth() {
		if(renderNode == null) {
			return -1;
		}
		return renderNode.getOuterRenderWidth();
	}

	@Override
	public int getRenderHeight() {
		if(renderNode == null) {
			return -1;
		}
		return renderNode.getOuterRenderHeight();
	}

	@Override
	public boolean isFlexLayout() {
		return flexLayout != null;
	}

	/**
	 * Equivalent to {@link #set(float, float, float, float)} for usage with flex layout
	 * @param x The x coordinate (in pixels) relative to its parent
	 * @param y The y coordinate (in pixels) relative to its parent
	 * @param width The width in pixels
	 * @param height The height in pixels
	 */
	public void setFlex(float x, float y, float width, float height) {
		flexLayout = FlexLayoutRuleset.set(flexLayout, x, y, width, height);
	}

	/**
	 * Equivalent to {@link #setXY(float, float)} for usage with flex layout
	 * @param x The x coordinate (in pixels) relative to its parent
	 * @param y The y coordinate (in pixels) relative to its parent
	 */
	public void setXYFlex(float x, float y) {
		flexLayout = FlexLayoutRuleset.setXY(flexLayout, x, y);
	}

	/**
	 * Equivalent to {@link #setX(float)} for usage with flex layout
	 * @param x The x coordinate (in pixels) relative to its parent
	 */
	public void setXFlex(float x) {
		flexLayout = FlexLayoutRuleset.setX(flexLayout, x);
	}

	/**
	 * Equivalent to {@link #setY(float)} for usage with flex layout
	 * @param y The y coordinate (in pixels) relative to its parent
	 */
	public void setYFlex(float y) {
		flexLayout = FlexLayoutRuleset.setY(flexLayout, y);
	}

	/**
	 * Equivalent to {@link #setWidth(float)} for usage with flex layout
	 * @param width The width in pixels
	 */
	public void setWidthFlex(float width) {
		flexLayout = FlexLayoutRuleset.setWidth(flexLayout, width);
	}

	/**
	 * Equivalent to {@link #setHeight(float)} for usage with flex layout
	 * @param height The height in pixels
	 */
	public void setHeightFlex(float height) {
		flexLayout = FlexLayoutRuleset.setHeight(flexLayout, height);
	}
}




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