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| package org.apache.tapestry.form; |
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| import java.awt.Point; |
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| import org.apache.tapestry.IAsset; |
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| import org.apache.tapestry.IForm; |
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| import org.apache.tapestry.IMarkupWriter; |
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| import org.apache.tapestry.IRequestCycle; |
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| import org.apache.tapestry.Tapestry; |
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| public abstract class ImageSubmit extends Submit |
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| { |
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| protected void setName(IForm form)
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| { |
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| String nameOverride = getNameOverride();
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| setName((nameOverride == null) ? form.getElementId(this) : form.getElementId(this, nameOverride));
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| } |
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| protected boolean isClicked(IRequestCycle cycle, String name)
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| { |
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| String parameterName = name + ".x";
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| return (cycle.getParameter(parameterName) != null);
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| } |
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| protected void renderFormComponent(IMarkupWriter writer, IRequestCycle cycle)
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| { |
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| boolean disabled = isDisabled();
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| IAsset disabledImage = getDisabledImage();
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| IAsset finalImage = (disabled && disabledImage != null) ? disabledImage : getImage();
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| String imageURL = finalImage.buildURL(cycle);
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| writer.beginEmpty("input");
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| writer.attribute("type", "image");
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| writer.attribute("name", getName());
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| if (disabled)
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| writer.attribute("disabled", "disabled");
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| writer.attribute("border", 0);
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| writer.attribute("src", imageURL);
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| renderIdAttribute(writer, cycle);
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| renderInformalParameters(writer, cycle);
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| writer.closeTag();
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| } |
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| void handleClick(IRequestCycle cycle, IForm form)
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| { |
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| if (isParameterBound("point"))
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| { |
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| int x = Integer.parseInt(cycle.getParameter(getName() + ".x"));
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| int y = Integer.parseInt(cycle.getParameter(getName() + ".y"));
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| setPoint(new Point(x, y));
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| } |
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| super.handleClick(cycle, form);
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| } |
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| public abstract IAsset getDisabledImage(); |
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| public abstract IAsset getImage(); |
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| public abstract String getNameOverride(); |
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| public abstract void setPoint(Point point); |
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| protected void prepareForRender(IRequestCycle cycle)
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| { |
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| super.prepareForRender(cycle);
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| if (getImage() == null)
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| throw Tapestry.createRequiredParameterException(this, "image");
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| } |
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| } |