at.spardat.xma.page.effects.DefaultPageEffects Maven / Gradle / Ivy

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package at.spardat.xma.page.effects;

import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.widgets.Control;

import at.spardat.xma.page.PageClient;

public class DefaultPageEffects implements IPageEffects {   
    
    final private static String UNCOLLAPSED_FORMDATA_KEY = "uncollapsedFormData"; 
        
    final PageClient pageClient;
    
    final IControlColoring controlColoring; 
    
    boolean layoutRequired;
    
    public DefaultPageEffects(PageClient pageClient) {
        this.pageClient = pageClient;
        controlColoring = createControlColoring(this);
    }
    
    public void initializePageEffects() {    
        layoutRequired = false;
    }
    
    public void applyPageEffects() {
        if (layoutRequired) {
            pageClient.getComposite().layout(true,true);
        }
    }
    
    protected IControlColoring createControlColoring(IPageEffects pageEffects) {
        return new DefaultControlColoring(pageEffects);
    }    

    /**
     * This method is called every time the error state is changed.
     */
    public void errorStateChanged(Control control, boolean editable, boolean inError) {
        controlColoring.setBackgroundForErrorState(control,editable,inError);
    }
    
    /**
     * This method is called every time the mandatory flag has changed.
     */
    public void mandatoryChanged(Object uiControl, boolean mandatory) {             
    }    
    
    public void setEditableBackground(Control control, Color color) {
        controlColoring.setEditableBackground(control,color);
    }     
    
    public PageClient getPage () {
        return pageClient;
    }    
    
    protected IControlColoring getControlColoring() {
        return controlColoring;
    }
    

    public void setCollapsed(Control control, boolean condition) {
        FormData data = (FormData)control.getLayoutData();
        FormData uncollapsedFormData = getUncollapsedFormData(control,data);
        if (data.top != null || data.bottom != null) {
            if (!condition) {
                if (data.top != null) {
                    data.top = cloneFormAttachment(uncollapsedFormData.top);
                }
                if (data.bottom != null) {
                    data.bottom = cloneFormAttachment(uncollapsedFormData.bottom);                
                }                
                data.height = uncollapsedFormData.height;
                control.setVisible(true);
            } else {                
                if (uncollapsedFormData.top != null) {
                    data.top = cloneFormAttachment(uncollapsedFormData.top);
                    data.top.offset = 0;
                } else {
                    data.top=null;
                }
                if (data.bottom != null) {
                    data.bottom = cloneFormAttachment(uncollapsedFormData.bottom);
                    data.bottom.offset = 0;                    
                } else {
                    data.bottom = null;
                }
                data.height = 0;
                control.setVisible(false);                
            }
        } else if (data.left != null || data.right != null) {
            if (!condition) {
                data.width = -1;
                control.setVisible(true);
            } else {            
                data.width = 0;
                control.setVisible(false);                
            }                
        } else {
            throw new RuntimeException("Can not determine collapse direction for control "+control);            
        }
        layoutRequired=true;
    }
    
    protected FormData getUncollapsedFormData(Control control, FormData data) {
        FormData uncollapsedFormData = (FormData)control.getData(UNCOLLAPSED_FORMDATA_KEY);
        if (uncollapsedFormData == null) {
            uncollapsedFormData=cloneFormData(data);
            control.setData(UNCOLLAPSED_FORMDATA_KEY,uncollapsedFormData);
        }     
        return uncollapsedFormData;
    }

    private FormData cloneFormData ( FormData data ) {
        FormData clone = new FormData();
        clone.height = data.height;
        clone.width = data.width;
        clone.top = cloneFormAttachment(data.top);
        clone.bottom = cloneFormAttachment(data.bottom);        
        clone.left = cloneFormAttachment(data.left);        
        clone.right = cloneFormAttachment(data.right);        
        return clone;
    }

    private FormAttachment cloneFormAttachment ( FormAttachment formAttachment ) {
        if (formAttachment != null) {
            FormAttachment clone = new FormAttachment();
            clone.control = formAttachment.control;
            clone.alignment = formAttachment.alignment;
            clone.offset = formAttachment.offset;
            clone.numerator = formAttachment.numerator;
            clone.denominator = formAttachment.denominator;
            return clone;
        }
        return null;
    }     
    
}