I have a couple of questions regarding fwt

1. How come Label, Text, Button don't subclass fwt::Canvas?
2. Is there any way to add a tooltip/hint to a Widget?

1. How come Label, Text, Button don't subclass fwt::Canvas?

These controls are native to the platform, so dependent on how the underlying platform implements them.

2. Is there any way to add a tooltip/hint to a Widget?

Not at the moment.

Ok, but when dealing with widgets isn't the standard practice to have two sublclasses (Containter - contains widgets and Component - represents a single widget) in accordance to Composite design pattern?

We do: fwt::Pane.

I intend to draw out all widget with graphics context.

Thanks for all your help andy. I do, however have few more questions:

• Is there a way to get horizontal/vertical DPI (in SWT terms it is Dispay.getDPI.x/ .y (for horizontal and vertical DPI respectively) )?
• Is fwt always Left-to-Right?
• Is there a way to get monitor on which the widget is displayed? If no is it safe to assume that it will be the primary monitor?

Is there a way to get horizontal/vertical DPI (in SWT terms it is Dispay.getDPI.x/ .y (for horizontal and vertical DPI respectively) )?

Not today, although should be easy to expose it if it is on Display, although also need to figure out how to do it in JS first

Is fwt always Left-to-Right?

It is whatever SWT does by default in JVM, in browser yes

Is there a way to get monitor on which the widget is displayed? If no is it safe to assume that it will be the primary monitor?

I think you should be able to derive that from your widget bounds on the screen, then Monitor bounds?

I think you should be able to derive that from your widget bounds on the screen, then Monitor bounds?

Something like this?

//Comp reffers to widget
if(comp.posOnDisplay != null)
{
  Monitor.list.each |Monitor m|
  {
    if (m.screenBounds.contains(comp.posOnDisplay.x,comp.posOnDisplay.y))
    return m
  }

}
return Monitor.primary

EDIT: This ain't actual code, more like a prototype.

I pushed a fix to add Monitor.dpi, changeset

It looks like SWT only supports DPI for the entire display, not on per a monitor basis. I don't know if current OS support that, but seems like it should be a per monitor thing.

It looks like SWT only supports DPI for the entire display, not on per a monitor basis. I don't know if current OS support that, but seems like it should be a per monitor thing.

I would disagree with this. As an app developer I have no idea what I would be expected to do when the application window overlaps across two monitors with different DPIs.

For what it's worth, on Ubuntu Linux I have only one DPI setting for all monitors.