fix: 无数据时保留任务表格空行 (#4)

client/src/pdd_ui.py

@@ -28,7 +28,7 @@
 from dataclasses import dataclass
 from typing import Iterable, Optional
 
-from PyQt5.QtCore import QAbstractTableModel, QModelIndex, Qt, pyqtSignal
+from PyQt5.QtCore import QAbstractTableModel, QEvent, QModelIndex, Qt, pyqtSignal
 from PyQt5.QtGui import QKeySequence
 from PyQt5.QtWidgets import (
     QAbstractItemView,
@@ -36,7 +36,6 @@ from PyQt5.QtWidgets import (
     QHeaderView,
     QHBoxLayout,
     QShortcut,
-    QStackedWidget,
     QVBoxLayout,
     QWidget,
 )
@@ -102,9 +101,12 @@ class TaskTableModel(QAbstractTableModel):
         self._keyword = ""
         self._sort_column = 7
         self._sort_order = Qt.DescendingOrder
+        self._placeholder_row_count = 1
 
     def rowCount(self, parent=QModelIndex()) -> int:
-        return 0 if parent.isValid() else len(self._rows)
+        if parent.isValid():
+            return 0
+        return len(self._rows) or self._placeholder_row_count
 
     def columnCount(self, parent=QModelIndex()) -> int:
         return 0 if parent.isValid() else len(self.HEADERS)
@@ -143,7 +145,7 @@ class TaskTableModel(QAbstractTableModel):
         return None
 
     def flags(self, index):
-        if not index.isValid():
+        if not index.isValid() or index.row() >= len(self._rows):
             return Qt.NoItemFlags
         return Qt.ItemIsEnabled | Qt.ItemIsSelectable
 
@@ -214,6 +216,26 @@ class TaskTableModel(QAbstractTableModel):
     def filtered_count(self) -> int:
         return len(self._filtered_rows)
 
+    def data_row_count(self) -> int:
+        """返回真实任务行数，不包含填满空表格的占位行。"""
+
+        return len(self._rows)
+
+    def set_placeholder_row_count(self, count: int) -> None:
+        """设置无数据时显示的禁用空行数量。"""
+
+        count = max(1, count)
+        if count == self._placeholder_row_count:
+            return
+
+        if self._rows:
+            self._placeholder_row_count = count
+            return
+
+        self.beginResetModel()
+        self._placeholder_row_count = count
+        self.endResetModel()
+
     def _rebuild_filtered_rows(self) -> None:
         self._filtered_rows = [
             task for task in self._source_rows if self._matches_filters(task)
@@ -372,35 +394,30 @@ class PDDTaskPage(QWidget):
         self.taskTable.setColumnWidth(7, 156)
         self.taskTable.setColumnWidth(8, 72)
         self.taskTable.sortByColumn(7, Qt.DescendingOrder)
+        self.taskTable.viewport().installEventFilter(self)
 
-        self.emptyPage = QWidget(self)
-        emptyLayout = QVBoxLayout(self.emptyPage)
-        emptyLayout.setContentsMargins(32, 32, 32, 32)
-        emptyLayout.addStretch(1)
-        self.emptyTitleLabel = SubtitleLabel("还没有领取过任务", self.emptyPage)
-        self.emptyTitleLabel.setAlignment(Qt.AlignCenter)
+        self.emptyStateCard = CardWidget(self)
+        emptyLayout = QHBoxLayout(self.emptyStateCard)
+        emptyLayout.setContentsMargins(16, 10, 16, 10)
+
+        emptyTextLayout = QVBoxLayout()
+        emptyTextLayout.setSpacing(2)
+        self.emptyTitleLabel = SubtitleLabel(
+            "还没有领取过任务", self.emptyStateCard
+        )
         self.emptyMessageLabel = BodyLabel(
-            "点击“开始自动获取”开始领取任务。", self.emptyPage
+            "点击“开始自动获取”开始领取任务。", self.emptyStateCard
         )
-        self.emptyMessageLabel.setAlignment(Qt.AlignCenter)
         self.emptyMessageLabel.setWordWrap(True)
-        self.clearFiltersButton = PushButton("清除筛选条件", self.emptyPage)
+        emptyTextLayout.addWidget(self.emptyTitleLabel)
+        emptyTextLayout.addWidget(self.emptyMessageLabel)
+
+        self.clearFiltersButton = PushButton(
+            "清除筛选条件", self.emptyStateCard
+        )
         self.clearFiltersButton.setAccessibleName("清除全部任务筛选条件")
-
-        clearButtonLayout = QHBoxLayout()
-        clearButtonLayout.addStretch(1)
-        clearButtonLayout.addWidget(self.clearFiltersButton)
-        clearButtonLayout.addStretch(1)
-
-        emptyLayout.addWidget(self.emptyTitleLabel)
-        emptyLayout.addWidget(self.emptyMessageLabel)
-        emptyLayout.addSpacing(8)
-        emptyLayout.addLayout(clearButtonLayout)
-        emptyLayout.addStretch(1)
-
-        self.contentStack = QStackedWidget(self)
-        self.contentStack.addWidget(self.taskTable)
-        self.contentStack.addWidget(self.emptyPage)
+        emptyLayout.addLayout(emptyTextLayout, 1)
+        emptyLayout.addWidget(self.clearFiltersButton)
 
     def _build_status_area(self) -> None:
         self.statusCard = CardWidget(self)
@@ -419,7 +436,8 @@ class PDDTaskPage(QWidget):
         layout.setSpacing(16)
         layout.addWidget(TitleLabel("PDD 任务", self))
         layout.addWidget(self.commandCard)
-        layout.addWidget(self.contentStack, 1)
+        layout.addWidget(self.emptyStateCard)
+        layout.addWidget(self.taskTable, 1)
         layout.addWidget(self.statusCard)
 
     def _connect_ui_events(self) -> None:
@@ -434,6 +452,11 @@ class PDDTaskPage(QWidget):
         self.findShortcut = QShortcut(QKeySequence.Find, self)
         self.findShortcut.activated.connect(self.keywordInput.setFocus)
 
+    def eventFilter(self, watched, event):
+        if watched is self.taskTable.viewport() and event.type() == QEvent.Resize:
+            self._update_placeholder_rows()
+        return super().eventFilter(watched, event)
+
     def set_tasks(self, tasks: Iterable[TaskRow]) -> None:
         """显示任务数据，并尽量恢复原来选中的稳定任务编号。"""
 
@@ -537,8 +560,8 @@ class PDDTaskPage(QWidget):
         )
 
     def _update_empty_state(self) -> None:
-        if self.taskModel.rowCount() > 0:
-            self.contentStack.setCurrentWidget(self.taskTable)
+        if self.taskModel.data_row_count() > 0:
+            self.emptyStateCard.hide()
             return
 
         if self._has_active_filters():
@@ -561,4 +584,13 @@ class PDDTaskPage(QWidget):
         self.emptyTitleLabel.setText(title)
         self.emptyMessageLabel.setText(message)
         self.clearFiltersButton.setVisible(show_clear_button)
-        self.contentStack.setCurrentWidget(self.emptyPage)
+        self.emptyStateCard.show()
+        self._update_placeholder_rows()
+
+    def _update_placeholder_rows(self) -> None:
+        """用不可交互的空行填满无数据时的表格可视区域。"""
+
+        row_height = max(1, self.taskTable.verticalHeader().defaultSectionSize())
+        viewport_height = max(row_height, self.taskTable.viewport().height())
+        row_count = max(1, viewport_height // row_height)
+        self.taskModel.set_placeholder_row_count(row_count)