Touch RPN Android: LCD, clipboard and layout

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LCD gestures and the Clipboard

The LCD area accepts a number of gestures.

Figure 1: The LCD display accepts four gestures. They are distinguished by touching left or right, quick touch or long press.

Right side, quick touch: copy the displayed value (the X register) to the clipboard. The LCD blinks once briefly.

Right side, long press: paste a number from the clipboard into the X register. The LCD blinks slowly once when the paste-in was successful, or blinks twice if it didn't work.

Left side, quick touch: show the calculator backside. It is a quick guide with some information about mathematical operations.

Left side, long press: open the Color Editor.

Number format vs the Clipboard

The value is copied to Clipboard with the configured decimal separator, and no thousand separators.

When pasting in a value, the thousand separators are ignored, and the decimal separator must be the one configured in your device's Language settings.

If the clipboard contents cannot be interpreted as a number, paste-in won't work. This is signalled by blinking the LCD twice.

Figure 2: Quick guide, shown by touching the left side of the LCD area

Vertical layout, big-screen devices

The vertical or portrait layout can be more practical if you like to use your phone in portrait orientation. If you don't like, you can go to Settings and lock orientation to Landscape.

Figure 3: Vertical layout

The app adapts to many screen sizes, and the layout adapts automatically to the aspect of the available space. The app should work correctly in tablets that support windowed and split-screen mode.