這篇文章主要為大家詳細介紹了python3 PyQt5實現柱狀圖的方法,具有一定的參考價值,感興趣的小伙伴們可以參考一下
本文透過Python3 pyqt5實現了python Qt GUI快速編程的16章的excise範例。
#!/usr/bin/env python3 import random import sys from PyQt5.QtCore import (QAbstractListModel, QAbstractTableModel, QModelIndex, QSize, QTimer, QVariant, Qt,pyqtSignal) from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QListView, QSpinBox, QStyledItemDelegate,QStyleOptionViewItem, QWidget) from PyQt5.QtGui import QColor,QPainter,QPixmap class BarGraphModel(QAbstractListModel): dataChanged=pyqtSignal(QModelIndex,QModelIndex) def __init__(self): super(BarGraphModel, self).__init__() self.__data = [] self.__colors = {} self.minValue = 0 self.maxValue = 0 def rowCount(self, index=QModelIndex()): return len(self.__data) def insertRows(self, row, count): extra = row + count if extra >= len(self.__data): self.beginInsertRows(QModelIndex(), row, row + count - 1) self.__data.extend([0] * (extra - len(self.__data) + 1)) self.endInsertRows() return True return False def flags(self, index): #return (QAbstractTableModel.flags(self, index)|Qt.ItemIsEditable) return (QAbstractListModel.flags(self, index)|Qt.ItemIsEditable) def setData(self, index, value, role=Qt.DisplayRole): row = index.row() if not index.isValid() or 0 > row >= len(self.__data): return False changed = False if role == Qt.DisplayRole: value = value self.__data[row] = value if self.minValue > value: self.minValue = value if self.maxValue < value: self.maxValue = value changed = True elif role == Qt.UserRole: self.__colors[row] = value #self.emit(SIGNAL("dataChanged(QModelIndex,QModelIndex)"), # index, index) self.dataChanged[QModelIndex,QModelIndex].emit(index, index) changed = True if changed: #self.emit(SIGNAL("dataChanged(QModelIndex,QModelIndex)"), # index, index) self.dataChanged[QModelIndex,QModelIndex].emit(index, index) return changed def data(self, index, role=Qt.DisplayRole): row = index.row() if not index.isValid() or 0 > row >= len(self.__data): return QVariant() if role == Qt.DisplayRole: return self.__data[row] if role == Qt.UserRole: return QVariant(self.__colors.get(row, QColor(Qt.red))) if role == Qt.DecorationRole: color = QColor(self.__colors.get(row, QColor(Qt.red))) pixmap = QPixmap(20, 20) pixmap.fill(color) return QVariant(pixmap) return QVariant() class BarGraphDelegate(QStyledItemDelegate): def __init__(self, minimum=0, maximum=100, parent=None): super(BarGraphDelegate, self).__init__(parent) self.minimum = minimum self.maximum = maximum def paint(self, painter, option, index): myoption = QStyleOptionViewItem(option) myoption.displayAlignment |= (Qt.AlignRight|Qt.AlignVCenter) QStyledItemDelegate.paint(self, painter, myoption, index) def createEditor(self, parent, option, index): spinbox = QSpinBox(parent) spinbox.setRange(self.minimum, self.maximum) spinbox.setAlignment(Qt.AlignRight|Qt.AlignVCenter) return spinbox def setEditorData(self, editor, index): value = index.model().data(index, Qt.DisplayRole) editor.setValue(value) def setModelData(self, editor, model, index): editor.interpretText() model.setData(index, editor.value()) class BarGraphView(QWidget): WIDTH = 20 def __init__(self, parent=None): super(BarGraphView, self).__init__(parent) self.model = None def setModel(self, model): self.model = model #self.connect(self.model, # SIGNAL("dataChanged(QModelIndex,QModelIndex)"), # self.update) self.model.dataChanged[QModelIndex,QModelIndex].connect(self.update) #self.connect(self.model, SIGNAL("modelReset()"), self.update) self.model.modelReset.connect(self.update) def sizeHint(self): return self.minimumSizeHint() def minimumSizeHint(self): if self.model is None: return QSize(BarGraphView.WIDTH * 10, 100) return QSize(BarGraphView.WIDTH * self.model.rowCount(), 100) def paintEvent(self, event): if self.model is None: return painter = QPainter(self) painter.setRenderHint(QPainter.Antialiasing) span = self.model.maxValue - self.model.minValue painter.setWindow(0, 0, BarGraphView.WIDTH * self.model.rowCount(), span) for row in range(self.model.rowCount()): x = row * BarGraphView.WIDTH index = self.model.index(row) color = QColor(self.model.data(index, Qt.UserRole)) y = self.model.data(index) painter.fillRect(x, span - y, BarGraphView.WIDTH, y, color) class MainForm(QDialog): def __init__(self, parent=None): super(MainForm, self).__init__(parent) self.model = BarGraphModel() self.barGraphView = BarGraphView() self.barGraphView.setModel(self.model) self.listView = QListView() self.listView.setModel(self.model) self.listView.setItemDelegate(BarGraphDelegate(0, 1000, self)) self.listView.setMaximumWidth(100) self.listView.setEditTriggers(QListView.DoubleClicked| QListView.EditKeyPressed) layout = QHBoxLayout() layout.addWidget(self.listView) layout.addWidget(self.barGraphView, 1) self.setLayout(layout) self.setWindowTitle("Bar Grapher") QTimer.singleShot(0, self.initialLoad) def initialLoad(self): # Generate fake data count = 20 self.model.insertRows(0, count - 1) for row in range(count): value = random.randint(1, 150) color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)) index = self.model.index(row) self.model.setData(index, value) self.model.setData(index, QVariant(color), Qt.UserRole) app = QApplication(sys.argv) form = MainForm() form.resize(600, 400) form.show() app.exec_()
運行結果:
相關推薦:
#
以上是python3+PyQt5實現長條圖的詳細內容。更多資訊請關注PHP中文網其他相關文章!

本文討論了版本3.10中介紹的Python的新“匹配”語句,該語句與其他語言相同。它增強了代碼的可讀性,並為傳統的if-elif-el提供了性能優勢

Python中的功能註釋將元數據添加到函數中,以進行類型檢查,文檔和IDE支持。它們增強了代碼的可讀性,維護,並且在API開發,數據科學和圖書館創建中至關重要。

本文討論了Python中的單位測試,其好處以及如何有效編寫它們。它突出顯示了諸如UNITSEST和PYTEST之類的工具進行測試。

文章討論了Python的\ _ \ _ Init \ _ \ _()方法和Self在初始化對象屬性中的作用。還涵蓋了其他類方法和繼承對\ _ \ _ Init \ _ \ _()的影響。

本文討論了python中@classmethod,@staticmethod和實例方法之間的差異,詳細介紹了它們的屬性,用例和好處。它說明瞭如何根據所需功能選擇正確的方法類型和DA

Inpython,YouAppendElementStoAlistusingTheAppend()方法。 1)useappend()forsingleelements:my_list.append(4).2)useextend()orextend()或= formultiplelements:my_list.extend.extend(emote_list)ormy_list = [4,5,6] .3)useInsert()forspefificpositions:my_list.insert(1,5).beaware


熱AI工具

Undresser.AI Undress
人工智慧驅動的應用程序,用於創建逼真的裸體照片

AI Clothes Remover
用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool
免費脫衣圖片

Clothoff.io
AI脫衣器

Video Face Swap
使用我們完全免費的人工智慧換臉工具,輕鬆在任何影片中換臉!

熱門文章

熱工具

SublimeText3 Linux新版
SublimeText3 Linux最新版

MantisBT
Mantis是一個易於部署的基於Web的缺陷追蹤工具,用於幫助產品缺陷追蹤。它需要PHP、MySQL和一個Web伺服器。請查看我們的演示和託管服務。

Safe Exam Browser
Safe Exam Browser是一個安全的瀏覽器環境,安全地進行線上考試。該軟體將任何電腦變成一個安全的工作站。它控制對任何實用工具的訪問,並防止學生使用未經授權的資源。

SAP NetWeaver Server Adapter for Eclipse
將Eclipse與SAP NetWeaver應用伺服器整合。

禪工作室 13.0.1
強大的PHP整合開發環境