Java图形编辑器:绘制、编辑、保存与打开

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资源摘要信息:"本压缩包文件包含的内容是关于Java编程语言在图形用户界面(GUI)中实现图形绘制、图形操作以及文件操作的相关示例代码和资源。具体知识点包括: 1. Java图形绘制:如何在Java的Swing库中使用Graphics类在JPanel上绘制基本图形,包括矩形、三角形、圆形、箭头和直线等。这涉及到Graphics类提供的drawRect、fillRect、drawOval、drawLine等方法。 2. Java图形编辑:提供关于图形对象的拖动和大小变化操作的方法。这可能涉及到鼠标事件处理,如MouseEvent和MouseMotionListener接口的使用,以及对图形位置和尺寸的动态调整逻辑。 3. 文件保存和读取:展示了如何将当前的绘图状态保存到文件中,以及如何加载文件内容来恢复图形对象的绘制。这通常涉及到文件输入输出流(如FileInputStream和FileOutputStream)的使用,以及可能使用Java序列化机制来保存对象状态。 4. GUI设计:解释了如何使用Swing组件设计一个用户友好的界面,允许用户通过图形界面进行操作,如打开、保存文件,以及进行绘图操作。 5. 事件驱动编程:讨论了在Java中如何使用事件监听器模型来响应用户的动作,例如点击按钮、拖动鼠标等,这在GUI编程中是不可或缺的部分。 6. 应用程序打包和部署:说明如何将编写的Java应用程序打包成可执行的jar文件,以及在Windows环境下如何通过rar工具压缩成压缩包。压缩包名“window_save_open.rar_open”暗示了这个过程,尽管通常我们使用jar后缀来表示Java的打包文件。 7. 开发环境配置:为了让读者更好地理解和实践,可能还会介绍相关的开发环境配置,例如安装Java开发工具包(JDK)、集成开发环境(IDE)如Eclipse或IntelliJ IDEA的配置,以及如何编译和运行Java程序。 通过这个资源包,学习者将能掌握在Java环境下进行基础图形绘制、图形操作、文件处理等编程技能,并能通过GUI与用户进行交互。这不仅适用于初学者,对于希望提高GUI编程能力的中级开发者来说也是个很好的学习资源。" 描述中提到的功能点,如图形绘制、拖动、改变大小、保存文件和打开文件编辑,都是Java Swing库中GUI编程的基础技能,对于希望从事桌面应用程序开发的开发者来说是必须掌握的知识。实现这些功能需要对Swing组件、事件监听器、Java I/O流有深入的理解。这个资源包的目的是提供一个完整的示例,帮助学习者快速掌握这些技能,并将其应用于实际开发中。

下面代码什么作用class MainWindow(QMainWindow, Ui_mainWindow): def init(self, parent=None): super(MainWindow, self).init(parent) self.setupUi(self) self.m_flag = False # style 1: window can be stretched # self.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowStaysOnTopHint) # style 2: window can not be stretched self.setWindowFlags(Qt.Window | Qt.FramelessWindowHint | Qt.WindowSystemMenuHint | Qt.WindowMinimizeButtonHint | Qt.WindowMaximizeButtonHint) # self.setWindowOpacity(0.85) # Transparency of window self.minButton.clicked.connect(self.showMinimized) self.maxButton.clicked.connect(self.max_or_restore) # show Maximized window # self.maxButton.animateClick(10) self.closeButton.clicked.connect(self.close) self.qtimer = QTimer(self) self.qtimer.setSingleShot(True) self.qtimer.timeout.connect(lambda: self.statistic_label.clear()) # search models automatically 自动搜索模型 self.comboBox.clear() self.pt_list = os.listdir('./pt') self.pt_list = [file for file in self.pt_list if file.endswith('.pt')] self.pt_list.sort(key=lambda x: os.path.getsize('./pt/'+x)) self.comboBox.clear() self.comboBox.addItems(self.pt_list) self.qtimer_search = QTimer(self) self.qtimer_search.timeout.connect(lambda: self.search_pt()) self.qtimer_search.start(2000) # yolov5 thread self.det_thread = DetThread() self.model_type = self.comboBox.currentText() self.det_thread.weights = "./pt/%s" % self.model_type self.det_thread.source = '0' self.det_thread.percent_length = self.progressBar.maximum() self.det_thread.send_raw.connect(lambda x: self.show_image(x, self.raw_video)) self.det_thread.send_img.connect(lambda x: self.show_image(x, self.out_video)) self.det_thread.send_statistic.connect(self.show_statistic) self.det_thread.send_msg.connect(lambda x: self.show_msg(x)) self.det_thread.send_percent.connect(lambda x: self.progressBar.setValue(x)) self.det_thread.send_fps.connect(lambda x: self.fps_label.setText(x)) self.fileButton.clicked.connect(self.open_file) self.cameraButton.clicked.connect(self.chose_cam) self.rtspButton.clicked.connect(self.chose_rtsp) self.runButton.clicked.connect(self.run_or_continue) self.stopButton.clicked.connect(self.stop) self.comboBox.currentTextChanged.connect(self.change_model) self.confSpinBox.valueChanged.connect(lambda x: self.change_val(x, 'confSpinBox')) self.confSlider.valueChanged.connect(lambda x: self.change_val(x, 'confSlider')) self.iouSpinBox.valueChanged.connect(lambda x: self.change_val(x, 'iouSpinBox')) self.iouSlider.valueChanged.connect(lambda x: self.change_val(x, 'iouSlider')) self.rateSpinBox.valueChanged.connect(lambda x: self.change_val(x, 'rateSpinBox')) self.rateSlider.valueChanged.connect(lambda x: self.change_val(x, 'rateSlider')) self.checkBox.clicked.connect(self.checkrate) self.saveCheckBox.clicked.connect(self.is_save) self.load_setting()

2023-06-03 上传

import os from PyQt5.QtCore import Qt from PyQt5.QtGui import QPixmap, QIcon from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QVBoxLayout, QHBoxLayout, QTreeView, QFileSystemModel class ImageViewer(QWidget): def init(self, folder_path): super().init() self.folder_path = folder_path self.image_dict = {} self.current_image = None self.setWindowTitle("Image Viewer") self.setFixedSize(1000, 600) self.image_label = QLabel(self) self.image_label.setAlignment(Qt.AlignCenter) self.tree_view = QTreeView() self.tree_view.setMinimumWidth(250) self.tree_view.setMaximumWidth(250) self.model = QFileSystemModel() self.model.setRootPath(folder_path) self.tree_view.setModel(self.model) self.tree_view.setRootIndex(self.model.index(folder_path)) self.tree_view.setHeaderHidden(True) self.tree_view.setColumnHidden(1, True) self.tree_view.setColumnHidden(2, True) self.tree_view.setColumnHidden(3, True) self.tree_view.doubleClicked.connect(self.tree_item_double_clicked) self.main_layout = QHBoxLayout(self) self.main_layout.addWidget(self.tree_view) self.main_layout.addWidget(self.image_label) self.load_images() self.update_image() def load_images(self): for file_name in os.listdir(self.folder_path): if file_name.lower().endswith((".jpg", ".jpeg", ".png", ".gif", ".bmp")): file_path = os.path.join(self.folder_path, file_name) self.image_dict[file_name] = file_path current_image = list(self.image_dict.keys())[0] def update_image(self): if self.current_image is not None: pixmap = QPixmap(self.image_dict[self.current_image]) self.image_label.setPixmap(pixmap.scaled(self.width() - self.tree_view.width(), self.height(), Qt.KeepAspectRatio, Qt.SmoothTransformation)) def tree_item_double_clicked(self, index): file_name = self.model.fileName(index) if file_name in self.image_dict: self.current_image = file_name self.update_image() def keyPressEvent(self, event): if event.key() == Qt.Key_A: self.previous_image() elif event.key() == Qt.Key_D: self.next_image() elif event.key() in [Qt.Key_1, Qt.Key_2, Qt.Key_3, Qt.Key_4, Qt.Key_5]: self.save_text_file(event.key() - Qt.Key_0) def previous_image(self): if self.current_image is not None: file_names = list(self.image_dict.keys()) current_index = file_names.index(self.current_image) if current_index > 0: self.current_image = file_names[current_index - 1] else: self.current_image = file_names[-1] self.update_image() def next_image(self): if self.current_image is not None: file_names = list(self.image_dict.keys()) current_index = file_names.index(self.current_image) if current_index < len(file_names) - 1: self.current_image = file_names[current_index + 1] else: self.current_image = file_names[0] self.update_image() def save_text_file(self, number): if self.current_image is not None: file_name = self.current_image txt_file_path = os.path.join(self.folder_path, os.path.splitext(file_name)[0] + ".txt") with open(txt_file_path, "w") as file: file.write(str(number)) if name == "main": import sys app = QApplication(sys.argv) viewer = ImageViewer("D:/图片/wallpaper") viewer.show() sys.exit(app.exec_())这份代码实现不了使用键盘的A键向上翻页以及D键向下翻页,也实现不了键盘数字键生成相应txt文档,帮我分析一下错在哪里

2023-06-07 上传

Exception in Tkinter callback Traceback (most recent call last): File "D:\python\Lib\tkinter\__init__.py", line 1948, in __call__ return self.func(*args) ^^^^^^^^^^^^^^^^ File "C:\Users\13923\Desktop\2\primay.py", line 69, in check Home(self.window) File "C:\Users\13923\Desktop\2\primay.py", line 96, in __init__ self.readExcel() File "C:\Users\13923\Desktop\2\primay.py", line 103, in readExcel self.head = pd.read_excel("1.xlsx").columns.tolist() ^^^^^^^^^^^^^^^^^^^^^^^ File "D:\python\Lib\site-packages\pandas\io\excel\_base.py", line 478, in read_excel io = ExcelFile(io, storage_options=storage_options, engine=engine) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\python\Lib\site-packages\pandas\io\excel\_base.py", line 1496, in __init__ ext = inspect_excel_format( ^^^^^^^^^^^^^^^^^^^^^ File "D:\python\Lib\site-packages\pandas\io\excel\_base.py", line 1371, in inspect_excel_format with get_handle( ^^^^^^^^^^^ File "D:\python\Lib\site-packages\pandas\io\common.py", line 868, in get_handle handle = open(handle, ioargs.mode) ^^^^^^^^^^^^^^^^^^^^^^^^^ FileNotFoundError: [Errno 2] No such file or directory: '1.xlsx' Exception in Tkinter callback Traceback (most recent call last): File "D:\python\Lib\tkinter\__init__.py", line 1948, in __call__ return self.func(*args) ^^^^^^^^^^^^^^^^ File "C:\Users\13923\Desktop\2\primay.py", line 219, in add_student self.detail_window.show_save(self.all_student_list) ^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'Home' object has no attribute 'all_student_list'

2023-06-12 上传