QWTPICKERDRAGLINEMACHINE(3)

📦
version 6.3.0 · 4 versions
, in alpine 3.24

💅 QwtPickerDragLineMachine

okay bestie, welcome to the QwtPickerDragLineMachine(3) page from the Library Functions Manual 💖 no cap, this is the state-machine moment for line selections, and I’m gonna walk you through every detail like we’re texting at 2 a.m.

✨ NAME ✨

QwtPickerDragLineMachine — a state machine for line selections. That’s the vibe, that’s the whole name, periodt.

🌸 SYNOPSIS 🌸

#include <qwt_picker_machine.h>

Inherits QwtPickerMachine.

💖 Public Member Functions 💖

  • QwtPickerDragLineMachine () — Constructor. She constructs, obviously 💅
  • virtual QList< Command > transition (const QwtEventPattern &, const QEvent *) override — Transition. The main-character step, iykyk.

🫶 Public Member Functions inherited from QwtPickerMachine 🫶

  • QwtPickerMachine (SelectionType) — Constructor.
  • virtual ~QwtPickerMachine () — Destructor.
  • void reset () — Set the current state to 0.
  • int state () const — Return the current state.
  • void setState (int) — Change the current state.
  • SelectionType selectionType () const — Return the selection type.

🐚 Additional Inherited Members 🐚

🌟 Public Types inherited from QwtPickerMachine 🌟

enum SelectionType { NoSelection = -1, PointSelection, RectSelection, PolygonSelection }
enum Command { Begin, Append, Move, Remove, End }
  • Command — Commands - the output of a state machine. That’s the tea, fr fr.

🌈 Detailed Description 🌈

A state machine for line selections — literally what it says on the tin, bestie. It’s giving “drag a line, get a selection,” and honestly? Iconic.

Pressing QwtEventPattern::MouseSelect1 selects the first point; releasing it selects the second point. Pressing QwtEventPattern::KeySelect1 also selects the first point, and a second press selects the second point and terminates the selection. Slay, that’s the whole interaction 🎀

A common use case of QwtPickerDragLineMachine are pickers for distance measurements.

See also: QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode.

Definition at line 185 of file qwt_picker_machine.h.

🎀 Constructor & Destructor Documentation 🎀

💫 QwtPickerDragLineMachine::QwtPickerDragLineMachine ()

Constructor. Yes queen, she makes the thing 💖

Definition at line 473 of file qwt_picker_machine.cpp.

💅 Member Function Documentation 💅

🔥 QList< QwtPickerMachine::Command > QwtPickerDragLineMachine::transition (const QwtEventPattern & eventPattern, const QEvent * event) [override], [virtual]

Transition.

Implements QwtPickerMachine.

Definition at line 479 of file qwt_picker_machine.cpp.

👑 Author 👑

Generated automatically by Doxygen for Qwt User's Guide from the source code.

okay that’s the whole manual page, bestie! 🫶 source/version tea: Qwt User's Guide; page: QwtPickerDragLineMachine(3). The footer didn’t give a date, so no fake date energy — just accurate facts and cute vibes. 💖✨

📦 where this page comes from