pax/booru-viewer
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Code Issues Releases 18 Activity

use viewport event filter for cell padding detection instead of signals

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pax 2026-04-10 20:34:36 -05:00
parent c8b21305ba
commit 00b8e352ea
1 changed files with 24 additions and 16 deletions
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38
booru_viewer/gui/grid.py
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@ -27,7 +27,6 @@ class ThumbnailWidget(QWidget):
clicked = Signal(int, object) # index, QMouseEvent
double_clicked = Signal(int)
right_clicked = Signal(int, object) # index, QPoint
padding_clicked = Signal() # click missed the pixmap
# QSS-controllable dot colors
_saved_color = QColor("#22cc22")
@ -307,7 +306,6 @@ class ThumbnailWidget(QWidget):
def mousePressEvent(self, event) -> None:
if event.button() == Qt.MouseButton.LeftButton:
if not self._hit_pixmap(event.position().toPoint()):
self.padding_clicked.emit()
return
self._drag_start = event.position().toPoint()
self.clicked.emit(self.index, event)
@ -321,7 +319,6 @@ class ThumbnailWidget(QWidget):
self._drag_start = None
if event.button() == Qt.MouseButton.LeftButton:
if not self._hit_pixmap(event.position().toPoint()):
self.padding_clicked.emit()
return
self.double_clicked.emit(self.index)
@ -443,6 +440,7 @@ class ThumbnailGrid(QScrollArea):
self._last_click_index = -1 # for shift-click range
self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
self.verticalScrollBar().valueChanged.connect(self._check_scroll_bottom)
self.viewport().installEventFilter(self)
# Rubber band drag selection
self._rubber_band: QRubberBand | None = None
self._rb_origin: QPoint | None = None
@ -472,7 +470,7 @@ class ThumbnailGrid(QScrollArea):
thumb.clicked.connect(self._on_thumb_click)
thumb.double_clicked.connect(self._on_thumb_double_click)
thumb.right_clicked.connect(self._on_thumb_right_click)
thumb.padding_clicked.connect(self._on_padding_click)
self._flow.add_widget(thumb)
self._thumbs.append(thumb)
@ -487,7 +485,7 @@ class ThumbnailGrid(QScrollArea):
thumb.clicked.connect(self._on_thumb_click)
thumb.double_clicked.connect(self._on_thumb_double_click)
thumb.right_clicked.connect(self._on_thumb_right_click)
thumb.padding_clicked.connect(self._on_padding_click)
self._flow.add_widget(thumb)
self._thumbs.append(thumb)
new_thumbs.append(thumb)
@ -568,6 +566,16 @@ class ThumbnailGrid(QScrollArea):
self.ensureWidgetVisible(self._thumbs[index])
self.context_requested.emit(index, pos)
def _is_empty_space(self, vp_pos: QPoint) -> bool:
"""True if the viewport position is not over a thumbnail's pixmap."""
# Map viewport coords to the flow widget (accounts for scroll offset)
flow_pos = self._flow.mapFrom(self.viewport(), vp_pos)
for thumb in self._thumbs:
if thumb.geometry().contains(flow_pos):
local = QPoint(flow_pos.x() - thumb.x(), flow_pos.y() - thumb.y())
return not thumb._hit_pixmap(local)
return True
def _start_rubber_band(self, pos: QPoint) -> None:
"""Start a rubber band selection and deselect."""
self._rb_origin = pos
@ -577,17 +585,17 @@ class ThumbnailGrid(QScrollArea):
self._rubber_band.show()
self.clear_selection()
def _on_padding_click(self) -> None:
"""Cell padding click — treat as empty space."""
self.clear_selection()
def mousePressEvent(self, event: QMouseEvent) -> None:
if event.button() == Qt.MouseButton.LeftButton:
child = self.childAt(event.position().toPoint())
if child is self.widget() or child is self.viewport():
def eventFilter(self, obj, event) -> bool:
if obj is self.viewport():
if event.type() == event.Type.MouseButtonPress and event.button() == Qt.MouseButton.LeftButton:
if self._is_empty_space(event.position().toPoint()):
self._start_rubber_band(event.position().toPoint())
return
super().mousePressEvent(event)
return True
if event.type() == event.Type.MouseButtonDblClick and event.button() == Qt.MouseButton.LeftButton:
if self._is_empty_space(event.position().toPoint()):
self.clear_selection()
return True
return super().eventFilter(obj, event)
def mouseMoveEvent(self, event: QMouseEvent) -> None:
if self._rb_origin and self._rubber_band: