Image forming apparatus and computer-readable storage medium

An image forming apparatus, comprising:

• a cartridge detachably attached to the image forming apparatus, the cartridge including a first compartment configured to store a colorant;
• a container configured to be connected with the cartridge, the container including a second compartment configured to store the colorant flowing from the cartridge;
• a recorder connected with the container, the recorder being configured to discharge the colorant supplied from the container;
• a display;
• a memory;
• and
• a controller configured to:
• control the recorder to discharge the colorant and the display to display an image in a screen;
• calculate a discharged amount value indicating an amount of the colorant having been discharged from the recorder;
• obtain first information, the first information indicating an initial amount being an amount of the colorant stored in the cartridge after attachment of the cartridge in the image forming apparatus, and second information, the second information indicating an amount of the colorant stored in the container prior to the attachment of the cartridge, from the memory;
• and
• display a first object including a bar, of which length is varied according to a first remainder amount indicating an amount of the colorant stored in the cartridge, the first remainder amount being determined based on the discharged amount value, the first information, and the second information, and a second object including a bar, of which length is varied according to a second remainder amount indicating the amount of the colorant stored in the container, in a single screen.

A non-transitory computer readable storage medium storing computer readable instructions that are executable by a computer in an information processing apparatus, the information processing apparatus comprising a display and a first communication interface, through which the information processing apparatus communicates with an image forming apparatus, the computer readable instructions, when executed by the computer, causing the computer to:

• receive first information, a detector signal, and second information from the image forming apparatus through the first communication interface, the first information indicating an amount of a colorant stored in a cartridge in the image forming apparatus, wherein the image forming apparatus comprises a sensor configured to output the detector signal in response to a surface level of the colorant stored in the cartridge having reached a detectable position, the detectable position is a liquid outlet of the cartridge, and wherein the detector signal indicates an ink-empty condition, the second information indicating an amount of the colorant stored in a container in the image forming apparatus;
• and
• control the display to display a first object, the first object indicating the amount of the colorant stored in the cartridge based on the first information, and a second object, the second object indicating the amount of the colorant stored in the container based on the second information, in a single screen.