如何让项目视图在PyQt中呈现富(html)文本？
如何让项目视图在PyQt中呈现富(html)文本？
提问于 2010-06-03 01:03:22
我正在尝试用python翻译来自this thread的代码：
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
__data__ = [
"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
"Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.",
"Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.",
"Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
]
def get_html_box(text):
return '''<table border="0" width="100%"><tr width="100%" valign="top">
<td width="1%"><img src="softwarecenter.png"/></td>
<td><table border="0" width="100%" height="100%">
<tr><td><b><a href="http://www.google.com">titolo</a></b></td></tr>
<tr><td>{0}</td></tr><tr><td align="right">88/88/8888, 88:88</td></tr>
</table></td></tr></table>'''.format(text)
class HTMLDelegate(QStyledItemDelegate):
def paint(self, painter, option, index):
model = index.model()
record = model.listdata[index.row()]
doc = QTextDocument(self)
doc.setHtml(get_html_box(record))
doc.setTextWidth(option.rect.width())
painter.save()
ctx = QAbstractTextDocumentLayout.PaintContext()
ctx.clip = QRectF(0, option.rect.top(), option.rect.width(), option.rect.height())
dl = doc.documentLayout()
dl.draw(painter, ctx)
painter.restore()
def sizeHint(self, option, index):
model = index.model()
record = model.listdata[index.row()]
doc = QTextDocument(self)
doc.setHtml(get_html_box(record))
doc.setTextWidth(option.rect.width())
return QSize(doc.idealWidth(), doc.size().height())
class MyListModel(QAbstractListModel):
def __init__(self, parent=None, *args):
super(MyListModel, self).__init__(parent, *args)
self.listdata = __data__
def rowCount(self, parent=QModelIndex()):
return len(self.listdata)
def data(self, index, role=Qt.DisplayRole):
return index.isValid() and QVariant(self.listdata[index.row()]) or QVariant()
class MyWindow(QWidget):
def __init__(self, *args):
super(MyWindow, self).__init__(*args)
# listview
self.lv = QListView()
self.lv.setModel(MyListModel(self))
self.lv.setItemDelegate(HTMLDelegate(self))
self.lv.setResizeMode(QListView.Adjust)
# layout
layout = QVBoxLayout()
layout.addWidget(self.lv)
self.setLayout(layout)
if __name__ == "__main__":
app = QApplication(sys.argv)
w = MyWindow()
w.show()
sys.exit(app.exec_())元素的大小和位置没有正确计算，我猜可能是因为我根本不理解原始代码中与样式相关的部分。有人能帮我吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2010-06-03 03:30:50
代码不考虑所需的目标绘图区域(option.rect)：
ctx.clip = QRectF(0, option.rect.top(), option.rect.width(), option.rect.height())上面的代码对绘制到指定区域的QTextDocument部分进行裁剪。您确实希望平移画笔，以便它在矩形的topLeft()处开始绘制，然后扩展到指定的宽度和高度。由于documentLayout()假设绘制器位于原点(即应绘制的位置)，因此修复方法如下：
def paint(self, painter, option, index):
model = index.model()
record = model.listdata[index.row()]
doc = QTextDocument(self)
doc.setHtml(get_html_box(record))
doc.setTextWidth(option.rect.width())
ctx = QAbstractTextDocumentLayout.PaintContext()
painter.save()
painter.translate(option.rect.topLeft());
painter.setClipRect(option.rect.translated(-option.rect.topLeft()))
dl = doc.documentLayout()
dl.draw(painter, ctx)
painter.restore()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/2959850
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