Fix various edge case bugs in QValidatedLineEdit #18133

pull luke-jr wants to merge 3 commits into bitcoin:master from luke-jr:bugfix_qvalidlineedit changing 2 files +9 −1

luke-jr commented at 2:38 AM on February 13, 2020: member
1. Use a CSS selector to avoid changing the background colour of the tooltip.
2. Re-check validity of input when we first set the validator (probably a no-op in practice).
3. Check validity of input when it is set programmatically via setText (eg, via the address book). Probably no-op in practice UNTIL merging #15987 or any other PR that adds a warning for valid addresses.
Bugfix: GUI: Only apply invalid style to QValidatedLineEdit, not its tooltip 2385b508d5
Bugfix: GUI: Re-check validity after QValidatedLineEdit::setCheckValidator b1a544be10
Bugfix: GUI: Check validity when QValidatedLineEdit::setText is called aeb18b665c
fanquake added the label GUI on Feb 13, 2020
in src/qt/qvalidatedlineedit.cpp:37 in aeb18b665c
```
  33 | @@ -28,7 +34,7 @@ void QValidatedLineEdit::setValid(bool _valid)
  34 |      }
  35 |      else
  36 |      {
  37 | -        setStyleSheet(STYLE_INVALID);
  38 | +        setStyleSheet("QValidatedLineEdit { " STYLE_INVALID "}");
```
hebasto commented at 9:00 AM on February 13, 2020:

~Are quotes around STYLE_INVALID macro really needed?~

luke-jr commented at 5:10 PM on February 15, 2020:

What?

hebasto commented at 6:51 PM on February 15, 2020:

Oh, misreading. Sorry for noise.
in src/qt/qvalidatedlineedit.cpp:115 in aeb18b665c
```
 111 | @@ -106,6 +112,7 @@ void QValidatedLineEdit::checkValidity()
 112 |  void QValidatedLineEdit::setCheckValidator(const QValidator *v)
 113 |  {
 114 |      checkValidator = v;
 115 | +    checkValidity();
```
hebasto commented at 9:08 AM on February 13, 2020:

This call might cause a side effect that is considered unwanted, no?

Here is an analogous code::

void QLineEdit::setValidator(const QValidator *v) { Q_D(QLineEdit); d->control->setValidator(v); }

I'd leave setCheckValidator() function untouched.
luke-jr commented at 5:11 PM on February 15, 2020:

I don't know why it would be unwanted.

promag commented at 2:12 AM on February 16, 2020:

b1a544be109d336c0b53722e3f8b51687972c94e @hebasto don't understand what side effect you are talking about nor why you point to that code, setValidator() is not called.
hebasto commented at 9:08 AM on February 13, 2020: member

Concept ACK aeb18b665c616c3326671b4c7e9d6421306564f0

in src/qt/qvalidatedlineedit.h:32 in aeb18b665c

  28 | @@ -29,6 +29,7 @@ class QValidatedLineEdit : public QLineEdit
  29 |      const QValidator *checkValidator;
  30 |  
  31 |  public Q_SLOTS:
  32 | +    void setText(const QString&);

promag commented at 2:15 AM on February 16, 2020:

aeb18b665c616c3326671b4c7e9d6421306564f0

Maybe drop this and add in the constructor:

connect(this, &QValidatedLineEdit::textChanged, this, &QValidatedLineEdit::checkValidity);

luke-jr commented at 12:14 PM on April 3, 2020:

Then it will run checkValidity twice for every keystroke?

promag commented at 2:16 AM on February 16, 2020: member

Concept ACK.
fanquake commented at 6:33 AM on August 14, 2020: member

A couple of Concept ACKs here, but no other comments for 6 months. Also seems that the 3rd commit is still a no-op (along with probably the second commit?), and #15987 has now been closed. I'm going to suggest re-opening in the GUI repo.
fanquake closed this on Aug 14, 2020
luke-jr cross-referenced this on Aug 12, 2021 from issue Fix various edge case bugs in QValidatedLineEdit by luke-jr
hebasto referenced this in commit b7942c9482 on Feb 9, 2022
sidhujag referenced this in commit f2bd0d1359 on Feb 9, 2022
bitcoin locked this on Feb 15, 2022

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#15987 Wallet, GUI: Warn when sending to already-used Bitcoin addresses