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Improved calculation of slider value when the slider gets clicked and added comments.

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The Wobbler 2025-01-25 12:58:09 +01:00
parent a3481f59bc
commit f815e21aa8
1 changed files with 15 additions and 2 deletions
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17
wobuzz/ui/track_progress_slider.py
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@ -2,7 +2,7 @@
from PyQt6.QtCore import Qt from PyQt6.QtCore import Qt
from PyQt6.QtGui import QMouseEvent from PyQt6.QtGui import QMouseEvent
from PyQt6.QtWidgets import QSlider from PyQt6.QtWidgets import QSlider, QStyle, QStyleOptionSlider
class TrackProgressSlider(QSlider): class TrackProgressSlider(QSlider):
@ -11,16 +11,29 @@ class TrackProgressSlider(QSlider):
self.dragged = False self.dragged = False
option = QStyleOptionSlider()
style = self.style()
self.handle_width = style.pixelMetric(QStyle.PixelMetric.PM_SliderThickness, option, self)
self.sliderPressed.connect(self.on_press) self.sliderPressed.connect(self.on_press)
self.sliderReleased.connect(self.on_release) self.sliderReleased.connect(self.on_release)
def mousePressEvent(self, event: QMouseEvent): def mousePressEvent(self, event: QMouseEvent):
# we need a custom press event bc. PyQt doesn't set the slider position when clicked
if event.button() == Qt.MouseButton.LeftButton: if event.button() == Qt.MouseButton.LeftButton:
event.accept() event.accept()
x = event.pos().x() x = event.pos().x()
value = self.maximum() * x // self.width() # old value calculation:
# value = self.maximum() * x // self.width()
# but we need that calculation because the handle width is limiting the range, and we need to set
# the slider handle's center to the click position, not the start of the handle
# (self.width() - self.handle_width) calculates the usable width and
# (x - self.handle_width // 2) offsets the position by minus half of the handle width
value = self.maximum() * (x - self.handle_width // 2) // (self.width() - self.handle_width)
self.setValue(value) self.setValue(value)
return super().mousePressEvent(event) return super().mousePressEvent(event)