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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(); |
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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("src", imageURL); |
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renderIdAttribute(writer, cycle); |
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renderInformalParameters(writer, cycle); |
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renderSubmitBindings(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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} |