基于python+JavaScript实现显示文件的二进制图表(软件构造大作业).zip

import random from PyQt5 import QtGui from PyQt5.QtCore import Qt from PyQt5.QtGui import QPainter, QPen, QColor, QCursor from PyQt5.QtWidgets import QWidget padding_left = 50 padding_bottom = 30 padding_top = 20 padding_right = 50 class View_Chart(QWidget): def __init__(self, line_color, background_color, x_axis_colors, y_axis_colors, tooltip_colors, data): super().__init__() self.line_color = line_color self.background_color = background_color self.x_axis_colors = x_axis_colors self.y_axis_colors = y_axis_colors self.tooltip_colors = tooltip_colors self.data = data self.x_show_interval = 1 self.x_plot_interval = 25 self.x_min = 0 self.x_max = 0 self.y_plot_interval = 15 self.y_max = 32767 self.y_min = -32768 self.y_plot_mid = None self.y_scatters = [] self.drag_chart_flag = False self.toolTip_index = 0 self.setMouseTracking(True) def paintEvent(self, event) -> None: painter = QPainter() self.brush_background(painter) self.calculate_y_scatters() self.draw_xaxis(painter) self.draw_yaxis(painter) self.draw_points(painter) self.draw_xaxis(painter) self.show_tool_tip(painter) def brush_background(self, painter: QPainter): """ 填充背景颜色 :param painter: :return: """ painter.begin(self) painter.setPen(QColor(self.background_color)) painter.setBrush(QColor(self.background_color)) painter.drawRect(0, 0, self.width(), self.height()) painter.end() def calculate_y_scatters(self): """ 计算所有应该显示的y轴坐标的位置 :return: """ self.y_scatters.clear() min_y = padding_top max_y = self.size().height() - padding_bottom mid_y = (min_y + max_y) // 2 index = mid_y - self.y_plot_interval while index >= min_y: self.y_scatters.append(index) index -= self.y_plot_interval index = mid_y + self.y_plot_interval while index <= max_y: self.y_scatters.append(index) index += self.y_plot_interval self.y_scatters.append(mid_y) self.y_plot_mid = mid_y self.y_scatters.sort() def draw_yaxis(self, painter: QPainter): pen = QPen(QColor(self.y_axis_colors), 2, Qt.SolidLine) # 画y轴 painter.begin(self) painter.setPen(pen) painter.drawLine(padding_left, padding_top, padding_left, self.size().height() - padding_bottom) painter.end() # 画y轴的坐标点 painter.begin(self) painter.setPen(pen) for i in range(len(self.y_scatters)): # 上半部分 if self.y_scatters[i] <= self.y_plot_mid: number = int((self.y_plot_mid - self.y_scatters[i]) / (self.y_plot_mid - self.y_scatters[0]) * self.y_max) # 下半部分 else: ll = len(self.y_scatters) - 1 number = int((self.y_scatters[i] - self.y_plot_mid) / (self.y_scatters[ll] - self.y_plot_mid) * self.y_min) painter.drawText(padding_left - 40, self.y_scatters[i], str(number)) painter.end() def draw_xaxis(self, painter: QPainter): pen = QPen(QColor(self.x_axis_colors), 2, Qt.SolidLine) painter.begin(self) painter.setPen(QColor(self.background_color)) painter.setBrush(QColor(self.background_color)) painter.drawRect(10, self.size().height() - padding_bottom, self.width(), padding_bottom) painter.end() painter.begin(self) painter.setPen(pen) painter.drawLine(padding_left, self.size().height() - padding_bottom, self.size().width() - padding_right, self.size().height() - padding_bottom) painter.end() # 画x轴的坐标 # y_show_interval 每隔多少个点显示一个坐标 # y_plot_interval 每隔多少像素显示一个坐标 painter.begin(self) painter.setPen(pen) x = padding_left index = self.x_min while x <= self.size().width() - padding_right: painter.drawText(x, self.size().height() - padding_bottom + 12, str(index)) index += self.x_show_interval x += self.x_plot_interval self.x_max = index - self.x_show_interval painter.end() def draw_points(self, painter: QPainter): if len(self.data) == 0: return pen = QPen(QColor(self.line_color), 1, Qt.SolidLine) painter.begin(self) painter.setPen(pen) x_plot_len = (self.x_max - self.x_min) // self.x_show_interval * self.x_plot_interval last_x = padding_left last_y = (self.y_max - self.data[self.x_min]) / (self.y_max - self.y_min) * ( self.y_scatters[len(self.y_scatters) - 1] - self.y_scatters[0]) + self.y_scatters[0] for i in range(self.x_min, min(self.x_max + 1, len(self.data))): x = int((i - self.x_min) / (self.x_max - self.x_min) * x_plot_len) + padding_left y = (self.y_max - self.data[i]) / (self.y_max - self.y_min) * ( self.y_scatters[len(self.y_scatters) - 1] - self.y_scatters[0]) + self.y_scatters[0] # painter.drawPoint(x, y) painter.drawLine(last_x, last_y, x, y) last_x = x last_y = y painter.end() def show_tool_tip(self, painter: QPainter): if len(self.data) == 0: return if self.toolTip_index == 0: return x = (self.toolTip_index - self.x_min) // self.x_show_interval * self.x_plot_interval + padding_left y = int((self.y_max - self.data[self.toolTip_index]) / (self.y_max - self.y_min) * ( self.y_scatters[len(self.y_scatters) - 1] - self.y_scatters[0]) + self.y_scatters[0]) painter.begin(self) pen = QPen(QColor(self.line_color), 1, Qt.SolidLine) painter.setPen(pen) painter.setBrush(QColor(self.tooltip_colors)) painter.drawLine(x, padding_top, x, self.height() - padding_bottom) painter.drawRect(x, y, 40, 20) painter.drawText(x + 5, y + 15, str(self.data[self.toolTip_index])) painter.end() def mousePressEvent(self, e: QtGui.QMouseEvent) -> None: if e.button() == Qt.LeftButton and e.pos().x() >= padding_left and e.pos().y() <= self.size().height() - padding_bottom: self.drag_chart_flag = True self.drag_chart_x1 = e.pos().x() self.drag_x_min = self.x_min self.setCursor(QCursor(Qt.OpenHandCursor)) def mouseMoveEvent(self, e: QtGui.QMouseEvent) -> None: # 拖拽 if self.drag_chart_flag: bias = (self.drag_chart_x1 - e.pos().x()) // self.x_plot_interval * self.x_show_interval # 移动距离 self.x_min = bias + self.drag_x_min if self.x_min < 0: self.x_min = 0 if self.x_min >= len(self.data): self.x_min = len(self.data) - 1 self.update() return # 鼠标移动，显示提示 if self.width() - padding_right >= e.pos().x() >= padding_left and self.size().height() - padding_bottom >= e.pos().y() >= padding_top: tooltip_index = (e.pos().x() - padding_left) // self.x_plot_interval * self.x_show_interval + self.x_min if self.toolTip_index != tooltip_index and tooltip_index < len(self.data): self.toolTip_index = tooltip_index self.update() return self.toolTip_index = 0 self.update() def mouseReleaseEvent(self, e: QtGui.QMouseEvent) -> None: if e.button() == Qt.LeftButton and self.drag_chart_flag: self.drag_chart_flag = False self.setCur