在QScintilla编辑器中插入图像

时间:2017-06-06 08:29:19

标签: python pyqt pyqt5 scintilla qscintilla

修改
标准QScintilla软件不支持此功能。但无论如何,Matic Kukovec做了一些破解工作。他的解决方案在下面的答案中解释,但也在此网页上解释:https://qscintilla.com/insert-images/

我想在QScintilla编辑器中插入图像。不幸的是,这样的功能不会很快被添加到官方的Scintilla项目中。看看这篇关于Scintilla-interest-group的帖子:

https://groups.google.com/forum/#!topic/scintilla-interest/Bwr4DY2Pv3Q

所以我必须自己实施。我试了一下。请将以下代码复制到python文件中并运行它。只需确保在同一文件夹中有qscintilla_logo.png图片,大约80 x 80像素:

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.Qsci import *

# -----------------------------------
# | A sample of C-code, pasted into |
# | the QScintilla editor           |
# -----------------------------------
myCodeSample = r"""#include <stdio.h>

/*
 * I want an image
 * right here =>
 */

int main()
{
    char arr[5] = {'h', 'e', 'l', 'l', 'o'};

    int i;

    for(i = 0; i < 5; i++) {
        printf(arr[i]);
    }

    return 0;

}""".replace("\n","\r\n")


# --------------------------------------------------

class CustomMainWindow(QMainWindow):
    def __init__(self):
        super(CustomMainWindow, self).__init__()

        # ---------------------------
        # |      Window setup       |
        # ---------------------------

        # 1. Define the geometry of the main window
        # ------------------------------------------
        self.setGeometry(300, 300, 800, 400)
        self.setWindowTitle("QScintilla Test")

        # 2. Create frame and layout
        # ---------------------------
        self.__frm = QFrame(self)
        self.__frm.setStyleSheet("QWidget { background-color: #ffeaeaea }")
        self.__lyt = QVBoxLayout()
        self.__frm.setLayout(self.__lyt)
        self.setCentralWidget(self.__frm)
        self.__myFont = QFont("Consolas", 14, weight=QFont.Bold)
        self.__myFont.setPointSize(14)

        # 3. Place a button
        # ------------------
        self.__btn = QPushButton("Qsci")
        self.__btn.setFixedWidth(50)
        self.__btn.setFixedHeight(50)
        self.__btn.clicked.connect(self.__btn_action)
        self.__btn.setFont(self.__myFont)
        self.__lyt.addWidget(self.__btn)

        # ---------------------------
        # | QScintilla editor setup |
        # ---------------------------

        # 1. Make instance of QSciScintilla class
        # ----------------------------------------
        self.__editor = QsciScintilla()
        self.__editor.setText(myCodeSample)
        self.__editor.setLexer(None)
        self.__editor.setUtf8(True)  # Set encoding to UTF-8
        self.__editor.setFont(self.__myFont)  # Can be overridden by lexer


        # 2. Create an image
        # -------------------
        self.__myImg = QPixmap("qscintilla_logo.png")
        self.__myImgLbl = QLabel(parent=self.__editor)
        self.__myImgLbl.setStyleSheet("QLabel { background-color : white; }");
        self.__myImgLbl.setPixmap(self.__myImg)
        self.__myImgLbl.move(300,80)


        # 3. Add editor to layout
        # ------------------------
        self.__lyt.addWidget(self.__editor)

        self.show()

    ''''''

    def __btn_action(self):
        print("Hello World!")

    ''''''


''' End Class '''

if __name__ == '__main__':
    app = QApplication(sys.argv)
    QApplication.setStyle(QStyleFactory.create('Fusion'))
    myGUI = CustomMainWindow()

    sys.exit(app.exec_())

''''''


运行Python脚本时,您应该得到以下结果:

enter image description here

我实际上在编辑器的上添加了一个QLabel ,并给它一个绝对的位置:

        self.__myImgLbl = QLabel(parent=self.__editor)
        self.__myImgLbl.move(300,80)

不幸的是,向下滚动时图像不会移动:

enter image description here

我想我知道为什么。让我解释。编辑器是QsciScintilla类的对象,它是QsciScintillaBase的子类,它是QAbstractScrollArea的子类:

enter image description here

我相信成功的关键是将QLabel添加到 {i}里面的小部件,而不是滚动区域本身。我已经尝试了几个东西来找到这个小部件,但没有成功。
如果它是QAbstractScrollArea,那么函数QScrollArea就足够了。但是widget()上没有此功能。

编辑1
python代码示例中的编辑器不执行任何语法突出显示,甚至没有行号。那是因为我只想关注实际问题 - 添加图像。代码示例基于:https://qscintilla.com/an-editor-in-a-gui/

编辑2
请不要就是否在编辑器中插入图像是一个好的或坏的想法发表意见。让我们坚持手头的技术问题。

1 个答案:

答案 0 :(得分:1)

嘿克里斯托夫尝试这个(你的例子做了一些修改):

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.Qsci import *

# -----------------------------------
# | A sample of C-code, pasted into |
# | the QScintilla editor           |
# -----------------------------------
myCodeSample = r"""#include <stdio.h>

/*
 * I want an image
 * right here =>
 */

int main()
{
    char arr[5] = {'h', 'e', 'l', 'l', 'o'};

    int i;

    for(i = 0; i < 5; i++) {
        printf(arr[i]);
    }

    return 0;

}""".replace("\n","\r\n")


# --------------------------------------------------
class MyScintilla(QsciScintilla):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.image = QImage("qscintilla_logo.png")

    def paintEvent(self, e):
        super().paintEvent(e)
        # Get paint rectangle size
        current_parent_size = self.size()
        image_line = 4
        image_column = 17
        # Find the paint offset
        line_height = 20
        font_width = 10
        first_visible_line = self.SendScintilla(self.SCI_GETFIRSTVISIBLELINE)
        paint_offset_x = image_column * font_width
        paint_offset_y = (image_line - first_visible_line) * line_height
        # Paint the image
        painter = QPainter()
        painter.begin(self.viewport())
        painter.drawImage(QPoint(paint_offset_x,paint_offset_y), self.image)
        painter.end()


class CustomMainWindow(QMainWindow):
    def __init__(self):
        super(CustomMainWindow, self).__init__()

        # ---------------------------
        # |      Window setup       |
        # ---------------------------

        # 1. Define the geometry of the main window
        # ------------------------------------------
        self.setGeometry(300, 300, 800, 400)
        self.setWindowTitle("QScintilla Test")

        # 2. Create frame and layout
        # ---------------------------
        self.__frm = QFrame(self)
        self.__frm.setStyleSheet("QWidget { background-color: #ffeaeaea }")
        self.__lyt = QVBoxLayout()
        self.__frm.setLayout(self.__lyt)
        self.setCentralWidget(self.__frm)
        self.__myFont = QFont("Consolas", 14, weight=QFont.Bold)
        self.__myFont.setPointSize(14)

        # 3. Place a button
        # ------------------
        self.__btn = QPushButton("Qsci")
        self.__btn.setFixedWidth(50)
        self.__btn.setFixedHeight(50)
        self.__btn.clicked.connect(self.__btn_action)
        self.__btn.setFont(self.__myFont)
        self.__lyt.addWidget(self.__btn)

        # ---------------------------
        # | QScintilla editor setup |
        # ---------------------------

        # 1. Make instance of QSciScintilla class
        # ----------------------------------------
        self.__editor = MyScintilla()
        self.__editor.setText(myCodeSample)
        self.__editor.setLexer(None)
        self.__editor.setUtf8(True)  # Set encoding to UTF-8
        self.__editor.setFont(self.__myFont)  # Can be overridden by lexer


        # 3. Add editor to layout
        # ------------------------
        self.__lyt.addWidget(self.__editor)

        self.show()

    ''''''

    def __btn_action(self):
        print("Hello World!")

    ''''''


''' End Class '''

if __name__ == '__main__':
    app = QApplication(sys.argv)
    QApplication.setStyle(QStyleFactory.create('Fusion'))
    myGUI = CustomMainWindow()

    sys.exit(app.exec_())

''''''

它只是对QsciScintilla类进行子类化并重载它的 paintEvent 方法。 诀窍是获取图像相对于文档视图的坐标。对于示例,我justed猜测行高和字体宽度,它可能可以从QScintilla获得。 另一件事是我只是用行和列偏移硬编码图像的位置,创建一个编辑器可以解析并自动插入图像的语法可能会很好。

此致