使用 PySide 和 QTextEdit（版本 2）的半透明突出显示
Semi-transparent highlights using PySide and QTextEdit (version 2)
我正在尝试使用以下列表制作一个更完整的 示例：
(1) 汇总 R、G、B、A 和突出显示计数（五个列表）
(2) 平均 R、G、B、A（四个列表）
平均值列表中的值被指定为背景色。聚合列表用于通过添加和减去突出显示颜色来计算平均值。每个列表的元素数与文本小部件中的字符数一样多。
我正在使用 pandas 数据框将亮点存储在内存中，因为最终可能会有大量的亮点需要以各种方式处理以及其他数据。将鼠标放在一个字符上会打印出它的位置、高光的数量和 RGBA 值。除了，有时会出现一个问题——就像画笔从一个高亮位置移动到另一个高亮位置时被拖了一秒钟一样。查看文本 "PySide.QtCore" 末尾 "e" 上的绿松石色。我认为问题在于我如何使用光标的设置和移动位置——但我不确定。添加每个突出显示后是否需要重置光标位置？我是不是选错了一个字？
import sys
import pandas as pd
import sqlite3
from PySide.QtCore import *
from PySide.QtGui import *
def connect_database(db_file):
try:
conn = sqlite3.connect(db_file)
return conn
except Error as e:
print(e)
return None
def create_data(connection): # database connection
c = connection.cursor() # database cursor
c.execute("CREATE TABLE sections(id INTEGER PRIMARY KEY, start INTEGER, end INTEGER, r INTEGER, g INTEGER, b INTEGER, a INTEGER)")
c.execute("INSERT INTO sections VALUES(1,0,20,100,200,100,100)")
c.execute("INSERT INTO sections VALUES(2,15,20,200,100,100,50)")
c.execute("INSERT INTO sections VALUES(3,18,30,100,100,200,100)")
c.execute("INSERT INTO sections VALUES(4,50,60,100,200,200,150)")
db.commit()
return c.lastrowid
class QTextEdit2(QTextEdit):
def __init__(self, parent=None):
super().__init__(parent)
self.setMouseTracking(True)
self.cursor = self.textCursor()
self.length = len(self.toPlainText())
self.bg_red = [0 for n in range(self.length)] # stores aggregate values of all highlights (not averages)
self.bg_green = [0 for n in range(self.length)]
self.bg_blue = [0 for n in range(self.length)]
self.bg_alpha = [0 for n in range(self.length)]
self.bg_count = [0 for n in range(self.length)] # number of highlights. if this is 0 then don't display
# stored r,g,b just display white. in this example
# only highlights are written. everything else stays
# default
self.display_red = [0 for n in range(self.length)] # set to the value to display (average of highlights)
self.display_green = [0 for n in range(self.length)]
self.display_blue = [0 for n in range(self.length)]
self.display_alpha = [0 for n in range(self.length)]
self.sections = self.load_sections()
self.color_sections()
def mouseMoveEvent(self, event):
point = QPoint()
x = event.x()
y = event.y()
point.setX(x)
point.setY(y)
n = self.cursorForPosition(point).position()
print("%d: Section Count: %d RGBA: %d %d %d %d" % (n, self.bg_count[n],self.display_red[n], self.display_green[n],self.display_blue[n], self.display_alpha[n]))
super().mouseMoveEvent(event)
def load_sections(self):
c = sqlite3.connect("qda_test_01.sqlite")
df = pd.read_sql_query("SELECT * FROM sections", c)
return df
def blend_colors(self, start, end, r, g, b, a):
for n in range(start,end):
self.bg_red[n] = self.bg_red[n]+r
self.bg_green[n] = self.bg_green[n]+g
self.bg_blue[n] = self.bg_blue[n]+b
self.bg_alpha[n] = self.bg_alpha[n]+a
self.bg_count[n] = self.bg_count[n]+1
self.display_red[n] = self.bg_red[n]/self.bg_count[n]
self.display_green[n] = self.bg_green[n] / self.bg_count[n]
self.display_blue[n] = self.bg_blue[n] / self.bg_count[n]
self.display_alpha[n] = self.bg_alpha[n] / self.bg_count[n]
if self.display_red[n] > 255: # just in case RGBA data is weird...
self.display_red[n] = 255
if self.display_green[n] > 255:
self.display_green[n] = 255
if self.display_blue[n] > 255:
self.display_blue[n] = 255
if self.display_alpha[n] > 255:
self.display_alpha[n] = 255
if self.display_red[n] < 0:
self.display_red[n] = 0
if self.display_green[n] < 0:
self.display_green[n] = 0
if self.display_blue[n] < 0:
self.display_blue[n] = 0
if self.display_alpha[n] < 0:
self.display_alpha[n] = 0
print("LOCATION: %d | SECTION: r:%d g:%g b:%d a:%d | DISPLAY: r:%d g:%g b:%d a:%d" % (n,self.bg_red[n],self.bg_green[n],self.bg_blue[n],self.bg_alpha[n],self.display_red[n],self.display_green[n],self.display_blue[n],self.display_alpha[n]))
color = QColor(self.display_red[n], self.display_green[n], self.display_blue[n])
color.setAlpha(self.display_alpha[n])
cursor = self.textCursor()
cursor.setPosition(n)
cursor.movePosition(QTextCursor.NextCharacter, QTextCursor.KeepAnchor, 1)
charfmt = cursor.charFormat()
charfmt.setBackground(color)
self.setCurrentCharFormat(charfmt)
self.setTextCursor(cursor)
def color_sections(self):
for n in range(self.sections.id.count()):
print("-----SECTION:%d-----" % (n))
section = self.sections.iloc[n]
self.blend_colors(section.start, section.end, section.r, section.g, section.b, section.a)
if __name__ == '__main__':
# Create database and sections to highlight
fn='qda_test_01.sqlite'
db=connect_database(fn)
id=create_data(db)
db.close()
app = QApplication(sys.argv)
window = QTextEdit2(
"In addition, the PySide.QtCore.QPoint class provides the PySide.QtCore.QPoint.manhattanLength() function which gives an inexpensive approximation of the length of the PySide.QtCore.QPoint object interpreted as a vector. Finally, PySide.QtCore.QPoint objects can be streamed as well as compared.")
window.show()
sys.exit(app.exec_())
如果您使用了我在 中给您的代码，当前示例将正常工作。实际上，您的更改引入了许多差一错误。
要对此进行调试，您应该首先检查以准确了解哪些文本块应该突出显示。取文本的前 65 个字符和数据库中的 start/end 值，得到：
>>> t = "In addition, the PySide.QtCore.QPoint class provides the PySide."
>>> t[0:20]
'In addition, the PyS'
>>> t[15:20]
'e PyS'
>>> t[18:30]
'ySide.QtCore'
>>> t[50:60]
'es the PyS'
如果将其与实际输出中的高亮部分进行比较，您会发现 none 部分正确匹配（例如，查看每个 "PySide" 中的 "S"） .
要使其正常工作，您必须在开始时一次获取文本光标，使用它进行所有必要的更改，然后重新设置它一次最后：
cursor = self.textCursor()
for n in range(start, end):
...
cursor.setPosition(n)
cursor.movePosition(QTextCursor.NextCharacter, QTextCursor.KeepAnchor)
charfmt = cursor.charFormat()
charfmt.setBackground(color)
cursor.setCharFormat(charfmt)
cursor.clearSelection()
self.setTextCursor(cursor)
这类似于更新数据库：您使用游标来安排一系列更改，然后在最后将它们作为单个操作提交。
我正在尝试使用以下列表制作一个更完整的
(1) 汇总 R、G、B、A 和突出显示计数（五个列表）
(2) 平均 R、G、B、A（四个列表）
平均值列表中的值被指定为背景色。聚合列表用于通过添加和减去突出显示颜色来计算平均值。每个列表的元素数与文本小部件中的字符数一样多。
我正在使用 pandas 数据框将亮点存储在内存中，因为最终可能会有大量的亮点需要以各种方式处理以及其他数据。将鼠标放在一个字符上会打印出它的位置、高光的数量和 RGBA 值。除了，有时会出现一个问题——就像画笔从一个高亮位置移动到另一个高亮位置时被拖了一秒钟一样。查看文本 "PySide.QtCore" 末尾 "e" 上的绿松石色。我认为问题在于我如何使用光标的设置和移动位置——但我不确定。添加每个突出显示后是否需要重置光标位置？我是不是选错了一个字？
import sys
import pandas as pd
import sqlite3
from PySide.QtCore import *
from PySide.QtGui import *
def connect_database(db_file):
try:
conn = sqlite3.connect(db_file)
return conn
except Error as e:
print(e)
return None
def create_data(connection): # database connection
c = connection.cursor() # database cursor
c.execute("CREATE TABLE sections(id INTEGER PRIMARY KEY, start INTEGER, end INTEGER, r INTEGER, g INTEGER, b INTEGER, a INTEGER)")
c.execute("INSERT INTO sections VALUES(1,0,20,100,200,100,100)")
c.execute("INSERT INTO sections VALUES(2,15,20,200,100,100,50)")
c.execute("INSERT INTO sections VALUES(3,18,30,100,100,200,100)")
c.execute("INSERT INTO sections VALUES(4,50,60,100,200,200,150)")
db.commit()
return c.lastrowid
class QTextEdit2(QTextEdit):
def __init__(self, parent=None):
super().__init__(parent)
self.setMouseTracking(True)
self.cursor = self.textCursor()
self.length = len(self.toPlainText())
self.bg_red = [0 for n in range(self.length)] # stores aggregate values of all highlights (not averages)
self.bg_green = [0 for n in range(self.length)]
self.bg_blue = [0 for n in range(self.length)]
self.bg_alpha = [0 for n in range(self.length)]
self.bg_count = [0 for n in range(self.length)] # number of highlights. if this is 0 then don't display
# stored r,g,b just display white. in this example
# only highlights are written. everything else stays
# default
self.display_red = [0 for n in range(self.length)] # set to the value to display (average of highlights)
self.display_green = [0 for n in range(self.length)]
self.display_blue = [0 for n in range(self.length)]
self.display_alpha = [0 for n in range(self.length)]
self.sections = self.load_sections()
self.color_sections()
def mouseMoveEvent(self, event):
point = QPoint()
x = event.x()
y = event.y()
point.setX(x)
point.setY(y)
n = self.cursorForPosition(point).position()
print("%d: Section Count: %d RGBA: %d %d %d %d" % (n, self.bg_count[n],self.display_red[n], self.display_green[n],self.display_blue[n], self.display_alpha[n]))
super().mouseMoveEvent(event)
def load_sections(self):
c = sqlite3.connect("qda_test_01.sqlite")
df = pd.read_sql_query("SELECT * FROM sections", c)
return df
def blend_colors(self, start, end, r, g, b, a):
for n in range(start,end):
self.bg_red[n] = self.bg_red[n]+r
self.bg_green[n] = self.bg_green[n]+g
self.bg_blue[n] = self.bg_blue[n]+b
self.bg_alpha[n] = self.bg_alpha[n]+a
self.bg_count[n] = self.bg_count[n]+1
self.display_red[n] = self.bg_red[n]/self.bg_count[n]
self.display_green[n] = self.bg_green[n] / self.bg_count[n]
self.display_blue[n] = self.bg_blue[n] / self.bg_count[n]
self.display_alpha[n] = self.bg_alpha[n] / self.bg_count[n]
if self.display_red[n] > 255: # just in case RGBA data is weird...
self.display_red[n] = 255
if self.display_green[n] > 255:
self.display_green[n] = 255
if self.display_blue[n] > 255:
self.display_blue[n] = 255
if self.display_alpha[n] > 255:
self.display_alpha[n] = 255
if self.display_red[n] < 0:
self.display_red[n] = 0
if self.display_green[n] < 0:
self.display_green[n] = 0
if self.display_blue[n] < 0:
self.display_blue[n] = 0
if self.display_alpha[n] < 0:
self.display_alpha[n] = 0
print("LOCATION: %d | SECTION: r:%d g:%g b:%d a:%d | DISPLAY: r:%d g:%g b:%d a:%d" % (n,self.bg_red[n],self.bg_green[n],self.bg_blue[n],self.bg_alpha[n],self.display_red[n],self.display_green[n],self.display_blue[n],self.display_alpha[n]))
color = QColor(self.display_red[n], self.display_green[n], self.display_blue[n])
color.setAlpha(self.display_alpha[n])
cursor = self.textCursor()
cursor.setPosition(n)
cursor.movePosition(QTextCursor.NextCharacter, QTextCursor.KeepAnchor, 1)
charfmt = cursor.charFormat()
charfmt.setBackground(color)
self.setCurrentCharFormat(charfmt)
self.setTextCursor(cursor)
def color_sections(self):
for n in range(self.sections.id.count()):
print("-----SECTION:%d-----" % (n))
section = self.sections.iloc[n]
self.blend_colors(section.start, section.end, section.r, section.g, section.b, section.a)
if __name__ == '__main__':
# Create database and sections to highlight
fn='qda_test_01.sqlite'
db=connect_database(fn)
id=create_data(db)
db.close()
app = QApplication(sys.argv)
window = QTextEdit2(
"In addition, the PySide.QtCore.QPoint class provides the PySide.QtCore.QPoint.manhattanLength() function which gives an inexpensive approximation of the length of the PySide.QtCore.QPoint object interpreted as a vector. Finally, PySide.QtCore.QPoint objects can be streamed as well as compared.")
window.show()
sys.exit(app.exec_())
如果您使用了我在
要对此进行调试，您应该首先检查以准确了解哪些文本块应该突出显示。取文本的前 65 个字符和数据库中的 start/end 值，得到：
>>> t = "In addition, the PySide.QtCore.QPoint class provides the PySide."
>>> t[0:20]
'In addition, the PyS'
>>> t[15:20]
'e PyS'
>>> t[18:30]
'ySide.QtCore'
>>> t[50:60]
'es the PyS'
如果将其与实际输出中的高亮部分进行比较，您会发现 none 部分正确匹配（例如，查看每个 "PySide" 中的 "S"） .
要使其正常工作，您必须在开始时一次获取文本光标，使用它进行所有必要的更改，然后重新设置它一次最后：
cursor = self.textCursor()
for n in range(start, end):
...
cursor.setPosition(n)
cursor.movePosition(QTextCursor.NextCharacter, QTextCursor.KeepAnchor)
charfmt = cursor.charFormat()
charfmt.setBackground(color)
cursor.setCharFormat(charfmt)
cursor.clearSelection()
self.setTextCursor(cursor)
这类似于更新数据库：您使用游标来安排一系列更改，然后在最后将它们作为单个操作提交。