主打一个 折磨 坑多 陪伴。代码为Python,C++的就自己逐条语句慢慢改吧。
Python代码:
python
import sys
from types import MethodType
from PyQt5.QtCore import Qt,QPoint,QSize,QRect,QEvent
from PyQt5.QtGui import QStandardItemModel, QStandardItem,QTextDocument,QTextCursor
from PyQt5.QtWidgets import QTreeView,QApplication,QItemDelegate,QStyle
class RichDelegate(QItemDelegate):#使用QItemDelegate进行单元格重绘:https://blog.csdn.net/Loc_Haoclass/article/details/106528047
__cboxSize=QSize(14,14)#复选框大小
__cboxAlignV=Qt.AlignVCenter#竖直位置(居中)
__cboxAlignH=Qt.AlignLeft#水平位置(左对齐)
def __init__(self,parent=None,*,align=None,size=None):
super().__init__(parent)
if(align):
self.SetCheckboxAlign(align)
if(size):
self.SetCheckboxSize(size)
def SetCheckboxAlign(self,align):#设置复选框位置
alignV=[Qt.AlignTop,Qt.AlignVCenter,Qt.AlignBottom]
alignH=[Qt.AlignLeft,Qt.AlignHCenter,Qt.AlignRight]
alignV=list(filter(lambda a:int(align) & int(a)!=0,alignV))
alignH=list(filter(lambda a:int(align) & int(a)!=0,alignH))
alignV.append(Qt.AlignVCenter)
alignH.append(Qt.AlignLeft)
self.__cboxAlignV=alignV[0]
self.__cboxAlignH=alignH[0]
def SetCheckboxSize(self,size):#设置复选框大小
self.__cboxSize=size
def editorEvent(self,event,model,opt,index):#处理复选框点击逻辑:https://blog.csdn.net/xbnlkdbxl/article/details/51316424
if(event.type()==QEvent.MouseButtonRelease):#仅处理鼠标抬起事件
if(event.button()==Qt.LeftButton):#仅处理鼠标左键
item=index.model().itemFromIndex(index)
if(item.isCheckable()):#仅处理复选框存在的情况
rect_cbox=self.__GetRect_Checkbox(opt.rect)
if(rect_cbox.contains(event.pos())):#仅复选框被点击时翻转状态
item.setCheckState(Qt.Unchecked if item.checkState()==Qt.Checked else Qt.Checked)
return True
return False
def drawCheck(self,ptr,opt,rect,state):#绘制复选框(这里直接默认绘制,有想法的可以改成其他绘制例如画个圈之类的
super().drawCheck(ptr,opt,rect,state)#默认绘制的复选框总是正方形
def paint(self,ptr,opt,index):
style=opt.widget.style() if opt.widget else QApplication.style()
style.drawControl(QStyle.CE_ItemViewItem, opt, ptr, opt.widget)#这条语句解决了行选中时背景色不变化的问题:https://blog.csdn.net/gongjianbo1992/article/details/108687172
rect=QRect(opt.rect)
item=index.model().itemFromIndex(index)
if(item.isCheckable()):#绘制复选框:https://blog.csdn.net/xbnlkdbxl/article/details/51316424
rect_cbox=self.__GetRect_Checkbox(rect)
self.drawCheck(ptr,opt,rect_cbox,item.checkState())
#计算剩余位置用于绘制文本内容
if(self.__cboxAlignH==Qt.AlignRight):#只调整水平位置(应该不会有人那么异端把复选框放在单元格正中间的吧,不会吧不会吧
rect.setRight(rect.right()-rect_cbox.width())
else:
rect.setLeft(rect.left()+rect_cbox.width())
tx=index.data()
doc=QTextDocument()
doc.setHtml(tx)
txDot='...'#替换为省略号
testPoint=QPoint(rect.width(), rect.height() / 2)#获取能完整显示的字符个数:https://blog.csdn.net/eiilpux17/article/details/118461445
pos = doc.documentLayout().hitTest(testPoint, Qt.ExactHit)
if(pos!=-1 and pos !=len(doc.toPlainText())):#不能完全显示的情况下进行字符替换
docDot=QTextDocument()
docDot.setHtml(txDot)
docDot.setDocumentMargin(0)#发现调用该语句后doc.size取值恢复正常:https://cloud.tencent.com/developer/ask/sof/105271901
testPoint=QPoint(rect.width()-docDot.size().width(), rect.height() / 2)
pos = doc.documentLayout().hitTest(testPoint, Qt.ExactHit)
if(pos==-1):
pos=0
cursor=QTextCursor(doc)
cursor.setPosition(pos)
# cursor.insertText(txDot)
cursor.movePosition(QTextCursor.End, QTextCursor.KeepAnchor)
cursor.insertText(txDot,cursor.block().charFormat())
LT=rect.bottomLeft()
LT.setY(LT.y()-doc.size().height())
# LT=rect.topLeft()
ptr.save()
ptr.translate(LT)
ptr.setClipRect(rect.translated(-rect.topLeft()))
# doc.setDefaultTextOption(doc.defaultTextOption())
doc.drawContents(ptr)
ptr.restore()
def sizeHint(self,opt,index):#设置行高函数:https://blog.csdn.net/Lutx/article/details/6641353
tx=index.data()
doc=QTextDocument()
doc.setHtml(tx)
size=doc.size()
return QSize(size.width(),size.height())
def __GetRect_Checkbox(self,rect):#返回复选框确切位置
alignV=[Qt.AlignTop,Qt.AlignVCenter,Qt.AlignBottom]
alignH=[Qt.AlignLeft,Qt.AlignHCenter,Qt.AlignRight]
posV=[rect.top(),rect.bottom()]
posH=[rect.left(),rect.right()]
for nape in [[self.__cboxAlignV,alignV,posV,self.__cboxSize.height()],
[self.__cboxAlignH,alignH,posH,self.__cboxSize.width()]]:
align,alignLst,pos,width=nape
index=alignLst.index(align)
if(index==0):#靠左/靠上
pos[1]=pos[0]+width
elif(index==1):#居中
pos[0]=pos[0]+int((pos[1]-pos[0]-width)/2)
pos[1]=pos[0]+width
elif(index==2):#靠右/靠下
pos[0]=pos[1]-width
return QRect(posH[0],posV[0],posH[1]-posH[0],posV[1]-posV[0])
if __name__ == '__main__':
app = QApplication(sys.argv)
tv=QTreeView()
tv.setModel(QStandardItemModel(tv))
model=tv.model()
model.appendRow([QStandardItem(d) for d in ['<font color="red" size=3> R3 </font>']])
model.appendRow([QStandardItem(d) for d in ['<font color="red" size=5> R5 </font>']])
model.appendRow([QStandardItem(d) for d in ['<font color="red" size=7> R7 </font>']])
model.appendRow([QStandardItem(d) for d in ['<font color="red" style="font-size:50px"> R50px </font>','<font style="background:#0000FF;font-size:70px">B70px</font>']])
model.appendRow([QStandardItem(d) for d in ['<font size=5><sub>bbb</sub><sup>ppp</sup><br><s>SSS</s><i>III</i><u>UUU</u></font><br><font color="red" style="background:#00FFFF;font-size:20pt">R20pt</font>']])
model.item(1,0).setCheckable(True)
model.item(3,1).setCheckable(True)
model.item(4,0).setCheckable(True)
rich_1=RichDelegate()
rich_2=RichDelegate(align=Qt.AlignBottom|Qt.AlignRight)#复选框右对齐是什么邪道行为,太怪了(感觉除了左居中以外的对齐都是邪道
tv.setItemDelegateForRow(0,rich_1)
tv.setItemDelegateForRow(1,rich_1)
tv.setItemDelegateForRow(2,rich_1)
tv.setItemDelegateForRow(3,rich_1)
tv.setItemDelegateForRow(4,rich_2)
tv.show()
sys.exit(app.exec())
运行结果:
补充:
1、我的代码仅完成富文本显示,像是往单元格里塞入按钮、下拉列表亦或是其他控件不在本篇讨论范围之内,有需要的可以参考[CSDN]QStyledItemDelegate单元格数据渲染与编辑、[51CTO]QTableWidget使用setCellWidget设置控件居中显示或是自行搜索其他文章
2、复选框的绘制样式甚至可以自定义,像是画成圆圈或是其他东西,又或是嫌黑色不好看改成紫色绿色啥的,只不过得自己实现就是了,重绘仅需QPainter倒少了挺多麻烦(只不过还是挺麻烦的所以没这需求就没必要自找麻烦
参考资料:
- 使用QItemDelegate显示富文本:[CSDN]https://blog.csdn.net/Loc_Haoclass/article/details/106528047
- QItemDelegate实现CheckBox复选框功能:[CSDN]https://blog.csdn.net/xbnlkdbxl/article/details/51316424
- QStyledItemDelegate单元格数据渲染与编辑:[CSDN]https://blog.csdn.net/gongjianbo1992/article/details/108687172
- 精确获取字符完整显示个数:[CSDN]https://blog.csdn.net/eiilpux17/article/details/118461445
- QItemDelegate单元格设置行高:[CSDN]https://blog.csdn.net/Lutx/article/details/6641353
本文发布于CSDN,未经个人同意不得私自转载:https://blog.csdn.net/weixin_44733774/article/details/133838003