Preloader for load games

portprotonqt/main_window.py

@@ -14,6 +14,7 @@ from portprotonqt.custom_widgets import ClickableLabel, AutoSizeButton, NavLabel
 from portprotonqt.portproton_api import PortProtonAPI
 from portprotonqt.input_manager import InputManager
 from portprotonqt.context_menu_manager import ContextMenuManager, CustomLineEdit
+from portprotonqt.preloader import Preloader
 from portprotonqt.system_overlay import SystemOverlay
 from portprotonqt.input_manager import GamepadType
 
@@ -219,6 +220,17 @@ class MainWindow(QMainWindow):
                 self.resize(width, height)
             else:
                 self.showNormal()
+        self._preloader = Preloader(parent=self)
+        self._update_preloader_position()
+
+    def _update_preloader_position(self):
+        if self._preloader:
+            self._preloader.move(self.rect().center() - self._preloader.rect().center())
+
+    def _close_preloader(self):
+        if self._preloader:
+            self._preloader.close()
+            self._preloader = None
 
     def on_slider_released(self) -> None:
         """Delegate to game library manager."""
@@ -434,6 +446,7 @@ class MainWindow(QMainWindow):
     def on_games_loaded(self, games: list[tuple]):
         self.game_library_manager.set_games(games)
         self.progress_bar.setVisible(False)
+        self._close_preloader()
 
     def open_portproton_forum_topic(self, topic_name: str):
         """Open the PortProton forum topic or search page for this game."""
@@ -775,6 +788,7 @@ class MainWindow(QMainWindow):
             self._last_width = self.width()
         if abs(self.width() - self._last_width) > 10:
             self._last_width = self.width()
+        self._update_preloader_position()
 
 
     def dragEnterEvent(self, event):

portprotonqt/preloader.py

@@ -0,0 +1,50 @@
+import time
+
+from PySide6.QtCore import QRect
+from PySide6.QtGui import QPainter, QPen, QBrush, Qt, QColor, QConicalGradient
+from PySide6.QtWidgets import QWidget
+
+
+class Preloader(QWidget):
+    def __init__(self, speed=180.0, line_line_width=20, color=QColor(0, 120, 215), parent=None):
+        super().__init__(parent)
+        self.setFixedSize(150, 150)
+        self._speed = speed
+        self._line_width = line_line_width
+        self._color1 = color
+        self._color2 = QColor(color.red(), color.green(), color.blue(), 0)
+        self._start_time = time.time()
+
+    def showEvent(self, event):
+        self._start_time = time.time()
+
+    def paintEvent(self, event):
+        rect = self._get_preloader_rect()
+        center = rect.center()
+        painter = QPainter(self)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing)
+        painter.setPen(self._get_pen())
+        painter.translate(center)
+        painter.rotate(self._get_angle())
+        painter.translate(-center)
+        painter.drawArc(rect, 0, 270 * 16)
+        self.update()
+
+    def _get_pen(self) -> QPen:
+        gradient = QConicalGradient()
+        gradient.setCenter(self.rect().center())
+        gradient.setColorAt(0, self._color1)
+        gradient.setColorAt(1, self._color2)
+        pen = QPen(QBrush(gradient), self._line_width)
+        pen.setCapStyle(Qt.PenCapStyle.RoundCap)
+        return pen
+
+    def _get_angle(self) -> float:
+        duration = time.time() - self._start_time
+        return (self._speed * duration) % 360.0
+
+    def _get_preloader_rect(self) -> QRect:
+        size = self._line_width // 2
+        rect = self.rect()
+        rect.adjust(size, size, -size, -size)
+        return rect