ImageCropper
ImageCropper is used to extract a certain part of an image to create a new image.
Documentation
<h:form>
<p:growl id="msgs" showDetail="true"/>
<h:panelGrid columns="2">
<p:imageCropper value="#{cropperView.croppedImage}" image="/resources/demo/images/nature/nature6.jpg" initialCoords="225,75,300,125" minSize="100,100" maxSize="250,250"/>
<h:panelGroup id="cropped">
<p:graphicImage rendered="#{not empty cropperView.newImageName}" name="demo/images/crop/#{cropperView.newImageName}.jpg" />
</h:panelGroup>
</h:panelGrid>
<p:commandButton value="Crop" action="#{cropperView.crop}" update="cropped msgs" icon="pi pi-clone"/>
</h:form>
@Named
@RequestScoped
public class CropperView {
private CroppedImage croppedImage;
private String newImageName;
public CroppedImage getCroppedImage() {
return croppedImage;
}
public void setCroppedImage(CroppedImage croppedImage) {
this.croppedImage = croppedImage;
}
public void crop() {
if(croppedImage == null) {
return;
}
setNewImageName(getRandomImageName());
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
String newFileName = externalContext.getRealPath("") + File.separator + "resources" + File.separator + "demo" +
File.separator + "images" + File.separator + "crop" + File.separator + getNewImageName() + ".jpg";
FileImageOutputStream imageOutput;
try {
imageOutput = new FileImageOutputStream(new File(newFileName));
imageOutput.write(croppedImage.getBytes(), 0, croppedImage.getBytes().length);
imageOutput.close();
} catch (Exception e) {
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Error", "Cropping failed."));
return;
}
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Success", "Cropping finished."));
}
private String getRandomImageName() {
int i = (int) (Math.random() * 100000);
return String.valueOf(i);
}
public String getNewImageName() {
return newImageName;
}
public void setNewImageName(String newImageName) {
this.newImageName = newImageName;
}
}
