Pick a default size for the bar presenter and allow the size to be changed by users:
public Dimension getPreferredSize(Object v) {
return psize;
}
public void setPreferredSize(Dimension psize) {
psize = new Dimension(psize);
}
We also need to define the isPresenterOf() method to check if a type of object can be presented by this
presenter. This is used when a presenter is assigned to a table column to avoid using it on the wrong
types of objects, if there is more than one type in the column.
public boolean isPresenterOf(Class type) {
return Number.class.isAssignableFrom(type);
}
Last, we define the paint() method for actually painting the bar. We can calculate the width of the bar
using the value passed into paint() and the maximum value and presenter area width. Then we align the bar
to the right of the area and paint.
public void paint(Graphics g, Object v, int x, int y, int w, int h) {
if(v != null && v instanceof Number) {
Rectangle clip = g.getClipBounds();
Color oc = g.getColor();
g.setClip(x, y, w, h);
double n = ((Number) v).doubleValue();
g.setColor(color);
int width = (int) (n * w / max);
g.fillRect(x+w-width, y+2, width, h-4);
g.setColor(oc);
g.setClip(clip);
}
}
Customized Report Summary
We have discussed the API behind the table report element. We followed this with a description of the
various table lens classes, which adapt data so that it is correctly formatted for the InetSoft table
report element. This was followed by a description of the Transformer classes, which are used to project
different views onto other table lens classes. We concluded by describing some advanced formatting
capabilities such as object presenters, which display graphic representations of numeric data.
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