Как сделать фон картинки QPixmap прозрачным в PyQt5 QGraphicsView?
Имеется: программа-игра, написанная на PyQt5. При нажатии на кнопку Начать игру появляются утки, которые создаются с помощью класса Duck на QGraphics-поле:
Проблема: фон у данных картинок (уток) не прозрачный, хотя формат картинок PNG.
Помогите, пожалуйста, сделать фон данных уток прозрачным.
Код:
import sys
import random
from PyQt5.QtWidgets import QWidget, QPushButton, QLabel, QHBoxLayout, QVBoxLayout, QLineEdit, QFormLayout, QGroupBox, \
QRadioButton, QMainWindow, QWidget, QGridLayout, QApplication, QGraphicsScene, QGraphicsView, QGraphicsItem, \
QGraphicsPixmapItem
from PyQt5.QtCore import Qt, QTimer
from PyQt5.QtGui import QFont, QPainter, QColor, QPixmap, QIcon, QBrush, QPen
WINDOW_HEIGHT = 600
WINDOW_WIDTH = 600
WINDOW_NAME = 'Истребитель уток'
WINDOW_ICON_NAME = 'Images\\main_logo.png'
MAIN_FONT = "Times"
FONT_HEADER_SIZE = 13
FONT_BODY_SIZE = 8
DUCKS_QTY = 8
class Duck(QGraphicsPixmapItem): # класс утки
def __init__(self):
super().__init__()
duck_pixmap = QPixmap("goose.png") # загрузка картинки
self.setPixmap(duck_pixmap)
self.setFlag(QGraphicsItem.ItemIsSelectable)
self.setPos(random.choice([-110, 600]), random.choice([230, 250, 270]))
self.duck_reverse_x = "Left"
self.duck_reverse_y = "Up"
class FormBuilder(QWidget):
ducks = []
duck_move_timer = QTimer()
def __init__(self, parent=None):
super().__init__(parent)
self.draw_brush = QBrush(Qt.green)
self.draw_pen = QPen(Qt.red)
self.duck_move_timer.setInterval(20)
self.duck_move_timer.timeout.connect(self.timeStep)
self.create_all_forms()
self.fill_forms()
self.create_layers()
def create_all_forms(self):
self.task_label = QLabel()
self.control_label = QLabel()
self.start_button = QPushButton()
self.quit_button = QPushButton()
self.quit_button.clicked.connect(self.duck_move_timer.stop)
self.quit_button.clicked.connect(self.game_stopped)
self.mode_label = QLabel()
self.first_rbutton = QRadioButton()
self.first_rbutton.clicked.connect(self.set_timer_interval)
self.second_rbutton = QRadioButton()
self.second_rbutton.clicked.connect(self.set_timer_interval)
self.third_rbutton = QRadioButton()
self.third_rbutton.clicked.connect(self.set_timer_interval)
self.results_label = QLabel()
self.play_time_qedit = QLineEdit(placeholderText="Время игры")
self.play_attempts_qedit = QLineEdit(placeholderText="Число попыток")
self.qgraphic_background_image = QPixmap("backimage.jpg")
self.background_graph_scene = QGraphicsScene()
self.background_graph_scene.selectionChanged.connect(
self.handle_qgraphic_selection)
self.graphic_view = QGraphicsView(self.background_graph_scene)
self.graphic_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.graphic_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.graphic_view.setFixedSize(565, 385)
self.background_graph_scene.addPixmap(self.qgraphic_background_image)
def fill_forms(self):
self.task_label.setText("Задача: убейте всех уток за меньшее число попыток.")
self.task_label.setFont(QFont(MAIN_FONT, FONT_HEADER_SIZE))
self.task_label.setAlignment(Qt.AlignCenter)
self.control_label.setText("Управление")
self.start_button.setText("Начать игру")
self.start_button.clicked.connect(self.build_qgraphic_ducks)
self.start_button.clicked.connect(self.game_started)
self.quit_button.setText("Закончить игру")
self.mode_label.setText("Режим:")
self.mode_label.setFont(QFont(MAIN_FONT, FONT_HEADER_SIZE))
self.first_rbutton.setText("1-я скорость")
self.first_rbutton.setChecked(True)
self.second_rbutton.setText("2-я скорость")
self.third_rbutton.setText("3-я скорость")
self.results_label.setText("Результаты:")
self.results_label.setFont(QFont(MAIN_FONT, FONT_HEADER_SIZE))
self.play_time_qedit.setDisabled(True)
self.play_attempts_qedit.setDisabled(True)
def create_layers(self):
outline = '''
QGroupBox {
margin-top: 2ex;
}
QGroupBox::title {
subcontrol-origin: margin;
left: 3ex;
}
'''
main_layout = QVBoxLayout(self)
task_layout = QHBoxLayout()
task_layout.addWidget(self.task_label)
main_layout.addLayout(task_layout)
self.control_groupbox = QGroupBox(self.control_label.text())
self.control_groupbox.setStyleSheet(outline)
control_groupbox_layout = QHBoxLayout(self.control_groupbox)
control_groupbox_layout.addWidget(self.start_button)
control_groupbox_layout.addWidget(self.quit_button)
main_layout.addWidget(self.control_groupbox)
self.mode_groupbox = QGroupBox(self.mode_label.text())
self.mode_groupbox.setStyleSheet(outline)
mode_groupbox_layout = QHBoxLayout(self.mode_groupbox)
mode_groupbox_layout.addWidget(self.first_rbutton)
mode_groupbox_layout.addWidget(self.second_rbutton)
mode_groupbox_layout.addWidget(self.third_rbutton)
main_layout.addWidget(self.mode_groupbox)
self.result_groupbox = QGroupBox(self.results_label.text())
self.result_groupbox.setStyleSheet(outline)
result_groupbox_layout = QHBoxLayout(self.result_groupbox)
result_groupbox_layout.addWidget(self.play_time_qedit)
result_groupbox_layout.addWidget(self.play_attempts_qedit)
main_layout.addWidget(self.result_groupbox)
background_image_layout = QHBoxLayout()
background_image_layout.addWidget(self.graphic_view)
main_layout.addLayout(background_image_layout)
def game_started(self):
rbuttons = [self.first_rbutton, self.second_rbutton, self.third_rbutton]
for rbutton in rbuttons:
rbutton.setDisabled(True)
self.start_button.setDisabled(True)
def game_stopped(self):
rbuttons = [self.first_rbutton, self.second_rbutton, self.third_rbutton]
for rbutton in rbuttons:
rbutton.setDisabled(False)
self.start_button.setDisabled(False)
def build_qgraphic_ducks(self):
print('Starting')
self.remove_qgraphic_ducks()
for duck_number in range(DUCKS_QTY):
duck = Duck()
self.ducks.append(duck)
self.background_graph_scene.addItem(duck)
self.duck_move_timer.start()
def remove_qgraphic_ducks(self):
self.ducks = []
all_qgraphic_objects = self.background_graph_scene.items()
for qgraphic_object in all_qgraphic_objects:
if type(qgraphic_object) != QGraphicsPixmapItem:
self.background_graph_scene.removeItem(qgraphic_object)
def handle_qgraphic_selection(self):
all_qgraphic_objects = self.background_graph_scene.selectedItems()
if len(all_qgraphic_objects) != 0:
for qgraphic_object in all_qgraphic_objects:
self.background_graph_scene.removeItem(all_qgraphic_objects[0])
def set_timer_interval(self):
rbuttons = [self.first_rbutton, self.second_rbutton, self.third_rbutton]
rbutton_num = 1
for rbutton in rbuttons:
if rbutton.isChecked() and rbutton_num == 1:
self.duck_move_timer.setInterval(20)
self.duck_move_timer.timeout.connect(self.timeStep)
elif rbutton.isChecked() and rbutton_num == 2:
self.duck_move_timer.setInterval(50)
self.duck_move_timer.timeout.connect(self.timeStep)
elif rbutton.isChecked() and rbutton_num == 3:
self.duck_move_timer.setInterval(100)
self.duck_move_timer.timeout.connect(self.timeStep)
rbutton_num += 1
def timeStep(self):
for duck in range(DUCKS_QTY):
if self.ducks[duck].pos().x() <= 35 or self.ducks[duck].duck_reverse_x == "Right":
self.ducks[duck].setPos(self.ducks[duck].pos().x() + random.randint(0, 5), self.ducks[duck].pos().y())
if self.ducks[duck].pos().x() >= 480:
self.ducks[duck].duck_reverse_x = "Left"
elif self.ducks[duck].pos().x() >= 565 or self.ducks[duck].duck_reverse_x == "Left":
self.ducks[duck].setPos(self.ducks[duck].pos().x() - random.randint(0, 5), self.ducks[duck].pos().y())
if self.ducks[duck].pos().x() <= 35:
self.ducks[duck].duck_reverse_x = "Right"
if self.ducks[duck].pos().y() <= 10 or self.ducks[duck].duck_reverse_y == "Down":
self.ducks[duck].setPos(self.ducks[duck].pos().x(), self.ducks[duck].pos().y() + random.randint(0, 3))
if self.ducks[duck].pos().y() >= 300:
self.ducks[duck].duck_reverse_y = "Up"
elif self.ducks[duck].pos().y() >= 300 or self.ducks[duck].duck_reverse_y == "Up":
self.ducks[duck].setPos(self.ducks[duck].pos().x(), self.ducks[duck].pos().y() - random.randint(0, 3))
if self.ducks[duck].pos().y() <= 10:
self.ducks[duck].duck_reverse_y = "Down"
self.background_graph_scene.update()
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.centralWidget = QWidget()
self.setCentralWidget(self.centralWidget)
self.build_skeleton_with_basic_settings()
self.create_and_connect_grid()
def build_skeleton_with_basic_settings(self):
self.setFixedSize(WINDOW_WIDTH, WINDOW_HEIGHT)
self.setWindowTitle(WINDOW_NAME)
self.setWindowIcon(QIcon(WINDOW_ICON_NAME))
def create_and_connect_grid(self):
self.main_grid = QGridLayout(self.centralWidget)
form_builder_object = FormBuilder()
self.main_grid.addWidget(form_builder_object, 0, 0, Qt.AlignTop)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = MainWindow()
ex.show()
sys.exit(app.exec_())
Картинка утки, подпишите её как goose.png:
Картинка фона, подпишите её как backimage.jpg:
