ButtonWhatsThis Class Reference

Unobtrusive button to trigger QWhatsThis since some operating systems (Linux Mint) do not show WhatsThis button in title bar. More...

#include <ButtonWhatsThis.h>

Inheritance diagram for ButtonWhatsThis:

Collaboration diagram for ButtonWhatsThis:

Public Member Functions
	ButtonWhatsThis (QWidget *parent=0)
	Single constructor.

Detailed Description

Unobtrusive button to trigger QWhatsThis since some operating systems (Linux Mint) do not show WhatsThis button in title bar.

A complication is that the size must be minimized explicitly to remove a large amount of padding, but in a manner that reliably works with various system font sizes

Definition at line 15 of file ButtonWhatsThis.h.

Constructor & Destructor Documentation

ButtonWhatsThis()

ButtonWhatsThis::ButtonWhatsThis

(

QWidget *

parent = 0

)

Single constructor.

Definition at line 10 of file ButtonWhatsThis.cpp.

                                                 :
  QPushButton ("?", parent)
{
  auto textSize = fontMetrics().size (Qt::TextShowMnemonic,
                                      text());
  QStyleOptionButton opt;
  opt.initFrom (this);
  opt.rect.setSize (textSize);
  setMinimumSize (style()->sizeFromContents (QStyle::CT_PushButton,
                                             &opt,
                                             textSize,
                                             this));
  setMaximumSize (style()->sizeFromContents (QStyle::CT_PushButton,
                                             &opt,
                                             textSize,
                                             this));
}

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The documentation for this class was generated from the following files:

• util/ButtonWhatsThis.h
• util/ButtonWhatsThis.cpp