gist.py

import sys

from PyQt4.QtGui import \
    QApplication, \
    QDialog, \
    QGraphicsScene, \
    QGraphicsView, \
    QVBoxLayout, \
    QPainter

from PyQt4.QtCore import \
    QRectF, \
    Qt


class GraphicsView(QGraphicsView):
    def __init__(self, fname='', parent=None):
        super(GraphicsView, self).__init__(parent)
        self.setDragMode(QGraphicsView.RubberBandDrag)
        self.setRenderHint(QPainter.Antialiasing)
        self.setRenderHint(QPainter.TextAntialiasing)

    def wheelEvent(self, event):
        factor = 1.41 ** (-event.delta() / 240.0)
        self.scale(factor, factor)


class Editor(QDialog):

    def __init__(self, parent=None):
        super(Editor, self).__init__(parent)

        pageSize = (842, 198)
        f = open('alotbsol.txt')
        txt = f.read()

        view = GraphicsView()
        scene = QGraphicsScene(self)
        scene.setSceneRect(0, 0, pageSize[0], pageSize[1])
        rect = QRectF(0, 0, pageSize[0], pageSize[1])
        scene.addRect(rect, Qt.black)
        textbox = scene.addText(txt)
        textbox.setTextWidth(pageSize[0])
        view.setScene(scene)

        layout = QVBoxLayout()
        layout.addWidget(view, 1)
        self.setLayout(layout)

        self.resize(scene.width() + 50, scene.height() * 2)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    widget = Editor()
    widget.show()
    app.exec_()