我完全是Qt的新手,因为我读了文件。 我参加了这一组合:
connect( Object1, Signal1, Object2, slot1 )
connect( Object1, Signal1, Object2, slot2 )
这可能是这方面的使用情况?
看看我从Erlang/Python的背景。 它必须同C++遗产继承者打交道,并转而我猜测。
情况是,如果你拥有像一个州这样的东西,就会改变另一个州的两个部分。 它可以保持沉默,但相当于将第二个排位职能从第一个位置上调。
Say,点击游戏/乐团,使停靠的纽顿活跃或活跃,并改变工具图。 这很容易用一个位置进行,但你可能希望选择在其他时间独立这样做。 为了促进再利用,你使用上述方法将一个信号连接到两个位置。
这将使其他物体能够分别触发排位1和排位2。
connect( Object1, Signal1, Object2, slot1 );
connect( Object1, Signal1, Object2, slot2 );
connect( Object3, Signal1, Object2, slot1 );
connect( Object4, Signal1, Object2, slot2 );
它实际上是一种真正强大的手段,可以做MVC......。 让我说,你想“联系”倾听物体的意见,而不是提供数据......
你可以把PieChart的观点与:
connect( MySourceModel, SIGNAL(newDataAreThere()), PieChartView, SLOT(notifyNewDataReceived()));
在你的申请中,还创建了另一个单元,需要倾听数据...... 无问题:
connect( MySourceModel, SIGNAL(newDataAreThere()), AnotherView, SLOT(notifyNewDataReceived()));
你们可以把你们的意见联系起来/脱节,而这个模式甚至知道谁听了他。 这并不是他的问题。
我希望我很少的例子可以理解;
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