Question

我编写了一个扩展Gtk.image的类，根据PyGTK: How do I make an image automatically scale to fit it's parent widget?自动调整父级大小，但有一些改进和更正。

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, GdkPixbuf, GLib

class ImageEx(Gtk.Image):
    pixbuf = None

    def __init__(self, *args, **kwargs):
        super(ImageEx, self).__init__(*args, **kwargs)
        self.connect("size-allocate", self.on_size_allocate)
        self.props = super(ImageEx, self).props
        self.props.width_request  = 100
        self.props.height_request = -1
        self.props.hexpand = True
        self.tempHeight = 0
        self.tempWidth  = 0
        self.origHeight = 0
        self.origWidth  = 0


    def set_from_pixbuf(self, pixbuf):
        self.pixbuf = pixbuf
        self.origHeight = pixbuf.get_height()
        self.origWidth  = pixbuf.get_width()
        self.tempHeight = 0
        self.tempWidth  = 0
        self.on_size_allocate(None, self.get_allocation())

    def calculateHeight(self, desiredWidth):
        return desiredWidth * self.origHeight / self.origWidth

    def on_size_allocate(self, obj, rect):
        if self.pixbuf is not None:
            desiredWidth = min(rect.width-10, self.origWidth)
            if self.tempWidth != desiredWidth:
                self.tempWidth = desiredWidth
                self.tempHeight = self.calculateHeight(desiredWidth)
                pixbuf = self.pixbuf.scale_simple(self.tempWidth,
                                                  self.tempHeight,
                                                  GdkPixbuf.InterpType.BILINEAR)
                GLib.idle_add(super(ImageEx, self).set_from_pixbuf,
                              pixbuf)

我在Gtk.Paned中使用它，它可以正常工作，我可以调整面板和窗口的大小，但是如果我展开窗口我无法使用窗口按钮恢复它但是如果我移动窗口，它恢复正确。

如何存在如此不一致的状态？我该如何纠正？

谢谢

GTK3可调整大小的图像可防止窗口恢复大小

0 个答案: