Preview.java 文件源码

private Preview() {
    myPrinter = new Printer();
    myKeyListener = new KeyAdapter() {

        public void keyPressed(KeyEvent event) {
            char ch = event.getKeyChar();
            int modifiers = event.getModifiers();

            if (ch == '+' || ch == '=') {
                if (isCtrl(modifiers)) {
                    increaseZoom();
                    updated();
                }
                else {
                    myScale.increaseValue();
                }
            }
            else if (ch == '-' || ch == '_') {
                if (isCtrl(modifiers)) {
                    decreaseZoom();
                    updated();
                }
                else {
                    myScale.decreaseValue();
                }
            }
            else if (ch == '/') {
                myScale.normalValue();
            }
            else if (ch == '*') {
                showCustom(true);
            }
        }
    };
}