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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| from typing import List | ||
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| from PyQt5.QtCore import (QPoint, Qt, QRect, QPropertyAnimation, QEasingCurve) | ||
| from PyQt5.QtGui import QMouseEvent | ||
| from PyQt5.QtWidgets import (QVBoxLayout, QFrame) | ||
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| from app.components.animation_frame import CardWidget | ||
| from app.common.style_sheet import StyleSheet | ||
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| class DraggableItem(CardWidget): | ||
| def __init__(self, parent=None): | ||
| super().__init__(parent) | ||
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| self.slideAni = QPropertyAnimation(self, b'pos', self) | ||
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| def sizeHint(self): | ||
| raise NotImplementedError() | ||
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| def slideTo(self, y: int, duration=250): | ||
| self.slideAni.setStartValue(self.pos()) | ||
| self.slideAni.setEndValue(QPoint(self.x(), y)) | ||
| self.slideAni.setDuration(duration) | ||
| self.slideAni.setEasingCurve(QEasingCurve.Type.InOutQuad) | ||
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| self.slideAni.start() | ||
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| class ItemsDraggableWidget(QFrame): | ||
| def __init__(self, parent=None): | ||
| super().__init__(parent=parent) | ||
| self.items: List[DraggableItem] = [] | ||
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| self.dragPos = QPoint() | ||
| self.isDragging = False | ||
| self.currentIndex = -1 | ||
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| self.vBoxLayout = QVBoxLayout(self) | ||
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| self.__initLayout() | ||
| StyleSheet.DRAGGABLE_WIDGET.apply(self) | ||
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| def __initLayout(self): | ||
| self.vBoxLayout.setAlignment(Qt.AlignTop | Qt.AlignHCenter) | ||
| self.vBoxLayout.setContentsMargins(11, 11, 11, 11) | ||
| self.vBoxLayout.setSpacing(6) | ||
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| def _addItem(self, item: DraggableItem): | ||
| item.pressed.connect(self.__onItemPressed) | ||
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| self.items.append(item) | ||
| self.vBoxLayout.addWidget(item) | ||
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| def mousePressEvent(self, e: QMouseEvent): | ||
| super().mousePressEvent(e) | ||
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| if e.button() != Qt.MouseButton.LeftButton or \ | ||
| not self.vBoxLayout.geometry().contains(e.pos()): | ||
| return | ||
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| self.dragPos = e.pos() | ||
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| def mouseMoveEvent(self, e: QMouseEvent): | ||
| super().mouseMoveEvent(e) | ||
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| if not self.vBoxLayout.geometry().contains(e.pos()) or \ | ||
| self.count() <= 1: | ||
| return | ||
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| index = self.getCurrentIndex() | ||
| if index == -1: | ||
| return | ||
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| item = self.tabItem(index) | ||
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| dy = e.pos().y() - self.dragPos.y() | ||
| self.dragPos = e.pos() | ||
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| if index == 0 and dy < 0 and item.y() <= 0: | ||
| return | ||
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| if index == self.count() - 1 and dy > 0 and \ | ||
| item.geometry().bottom() >= self.height() - 1: | ||
| return | ||
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| item.move(item.x(), item.y() + dy) | ||
| self.isDragging = True | ||
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| if dy < 0 and index > 0: | ||
| siblingIndex = index - 1 | ||
| siblingItem = self.tabItem(siblingIndex) | ||
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| if item.y() < siblingItem.geometry().center().y(): | ||
| self.__swapItem(siblingIndex) | ||
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| if dy > 0 and index < self.count() - 1: | ||
| siblingIndex = index + 1 | ||
| siblingItem = self.tabItem(siblingIndex) | ||
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| if item.geometry().bottom() > siblingItem.geometry().center().y(): | ||
| self.__swapItem(siblingIndex) | ||
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| def mouseReleaseEvent(self, e: QMouseEvent): | ||
| super().mouseReleaseEvent(e) | ||
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| if not self.isDragging: | ||
| return | ||
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| self.isDragging = False | ||
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| item = self.tabItem(self.getCurrentIndex()) | ||
| y = self.tabRect(self.getCurrentIndex()).y() | ||
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| # duration = int(abs(item.y() - y) * 250 / item.height()) | ||
| duration = 250 | ||
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| item.slideTo(y, duration) | ||
| item.slideAni.finished.connect(self.__adjustLayout) | ||
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| self.setCurrentIndex(-1) | ||
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| def _removeItem(self, item: DraggableItem): | ||
| index = self.items.index(item) | ||
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| self.items.pop(index) | ||
| self.vBoxLayout.removeWidget(item) | ||
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| item.deleteLater() | ||
| self.update() | ||
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| def __swapItem(self, index): | ||
| items = self.items | ||
| swappedItem = self.tabItem(index) | ||
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| y = self.tabRect(self.getCurrentIndex()).y() | ||
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| items[self.getCurrentIndex()], items[index] = \ | ||
| items[index], items[self.getCurrentIndex()] | ||
| self.setCurrentIndex(index) | ||
| swappedItem.slideTo(y) | ||
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| def __adjustLayout(self): | ||
| self.sender().disconnect() | ||
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| for item in self.items: | ||
| self.vBoxLayout.removeWidget(item) | ||
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| for item in self.items: | ||
| self.vBoxLayout.addWidget(item) | ||
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| self.repaint() | ||
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| def __onItemPressed(self): | ||
| item: DraggableItem = self.sender() | ||
| item.raise_() | ||
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| index = self.items.index(item) | ||
| self.setCurrentIndex(index) | ||
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| def setCurrentIndex(self, index: int): | ||
| self.currentIndex = index | ||
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| def getCurrentIndex(self): | ||
| return self.currentIndex | ||
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| def count(self): | ||
| return len(self.items) | ||
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| def tabItem(self, index: int) -> DraggableItem: | ||
| return self.items[index] | ||
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| def tabRect(self, index: int) -> QRect: | ||
| y = 0 | ||
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| for i in range(index): | ||
| y += self.tabItem(i).height() | ||
| y += self.vBoxLayout.spacing() | ||
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| rect = self.tabItem(index).geometry() | ||
| rect.moveTop(y + self.vBoxLayout.contentsMargins().top() + 1) | ||
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| return rect |
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