Java Keybinding Plus Key [英] Java Keybinding Plus Key

问题描述

我正在尝试创建用于放大和缩小我正在创建的图像编辑应用程序的快捷方式，我发现了一些奇怪的东西。要绑定 ctrl + + 的组合，我必须使用 = 键和一个控制和移位掩码：

I was trying to create shortcuts for zooming in and out in an image editing application I'm creating and I noticed something strange. To bind the combination of ctrl + +, I had to use the = key and a control and shift mask:

getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_EQUALS, KeyEvent.CTRL_DOWN_MASK + KeyEvent.SHIFT_DOWN_MASK),"ZoomIn");

我试图直接绑定到 VK_PLUS 工作：

Neither of the combinations where I tried to directly bind to VK_PLUS worked:

getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, KeyEvent.CTRL_DOWN_MASK + KeyEvent.SHIFT_DOWN_MASK),"ZoomIn");

getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, KeyEvent.CTRL_DOWN_MASK),"ZoomIn");

它现在可以使用第一行代码，但我想知道为什么底部都没有两个工作，如果键盘没有 + 键作为移位的 = 键，理论上可能会出现问题。

It works right now with the very first line of code, but I was wondering why neither of the bottom two work and if this could (theoretically) be a problem if a keyboard did not have the + key as the shifted = key.

推荐答案

对于数字键盘加试试 KeyEvent.VK_ADD ：

getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_ADD,
                KeyEvent.CTRL_DOWN_MASK), "plus");

对于主键盘上的加号（美国键盘布局），请使用：

For plus on main keyboard (US keyboard layout) use:

getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_EQUALS, KeyEvent.CTRL_DOWN_MASK | KeyEvent.SHIFT_DOWN_MASK),"plus"); 

对于非美国键盘使用 VK_PLUS 。请参阅 4262044 和6942481 进行一些澄清。

For non US keyboard use VK_PLUS. See bugs 4262044 and 6942481 for some clarifications.

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