<Swing Dev> [13] RFR JDK-8213535:Windows HiDPI html lightweight tooltips are truncated

[Prasanta Sadhukhan]

On 20-Apr-20 10:16 PM, Sergey Bylokhov wrote:
> On 4/20/20 8:34 am, Prasanta Sadhukhan wrote:
>>
>> On 20-Apr-20 8:54 PM, Sergey Bylokhov wrote:
>>> On 4/20/20 2:40 am, Prasanta Sadhukhan wrote:
>>>> http://cr.openjdk.java.net/~psadhukhan/8213535/webrev.4/
>>>>
>>>> used the right GC for the tip but we still need the preferredSize 
>>>> in the paint()
>>>
>>> Why do we need it? Do we calculate the size in the 
>>> ToolTipManager.showTipWindow() incorrectly?
>>> We call tip.getPreferredSize() there,  does it return different 
>>> result than in the paint() method?
>>>
>> No, there it returns the same value as paint() now after GC fix, but 
>> c.getSize() in paint() returns the JPanel size which is not same as 
>> preferredSize and it is not enough to contain the text, it seems.
>
> But the panel and window both are created by our code in 
> ToolTipManager.showTipWindow, should we adjust it?
>
But getPreferredSize() uses span calculation+6 which is not present in 
panel's setSize calculation. I would think using preferredSize is better 
than meddling with setSize calculation, given that 
TooltipManager.showTipWindow () also used getPreferredSize() to 
calculate the tip bounds.