Display device

A method comprising:

• displaying one of a plurality of screen images on a first portion of a display unit, the plurality of screen images including a base screen image, the display unit including the first portion and a second portion;
• changing a screen image to display from one to another of a plurality of screen images along a hierarchical screen navigation path starting from the base screen image;
• creating a concatenated string including title strings and separating characters alternately arranged, each title string corresponding to a screen image in an hierarchical position of the hierarchical screen navigation path from the base screen image to a current screen image that is displayed on the first portion currently, each title string indicating one of the plurality of screen images;
• determining whether or not the concatenated string is too large to be displayed entirely on the second portion;
• creating a navigation string by deleting at least one of the title strings from the concatenated string when the determining step determines that the concatenated string is too large to be displayed entirely on the second portion;
• displaying the navigation string including the title strings and the separating characters, on the second portion;
• acquiring a priority value assigned to each of the plurality of title strings, the priority value being separate from the hierarchical position of each title string;
• and
• repeatedly delete the title strings one at a time based on the priority value until the determining unit determines that the concatenated string becomes small enough to be displayed entirely on the second portion, without deleting the separating characters from the displayed concatenated string;
• wherein the navigation creating unit deletes title strings with the lowest priority values before deleting title strings with higher priority values;
• and
• wherein, if at least two title strings are assigned with a lowest priority value, deleting one of the at least two title strings based on the hierarchical position by deleting the one of the at least two title strings indicating a screen image nearest a base screen image side of the navigation path among at least two screen images corresponding to the at least two title strings.

A non-transitory computer-readable recording medium that stores a display control program, the display control program comprising instructions for:

• displaying one of a plurality of screen images on a first portion of a display unit, the plurality of screen images including a base screen image, the display unit including the first portion and a second portion;
• changing a screen image to display from one to another of a plurality of screen images along a hierarchical screen navigation path starting from the base screen image;
• creating a concatenated string including title strings and separating characters alternately arranged, each title string corresponding to a screen image in an hierarchical position of the hierarchical screen navigation path from the base screen image to a current screen image that is displayed on the first portion currently, each title string indicating one of the plurality of screen images;
• determining whether or not the concatenated string is too large to be displayed entirely on the second portion;
• creating a navigation string by deleting at least one of the title strings from the concatenated string when the determining step determines that the concatenated string is too large to be displayed entirely on the second portion;
• displaying the navigation string including the title strings and the separating characters, on the second portion;
• acquiring a priority value assigned to each of the plurality of title strings, the priority value being separate from the hierarchical position of each title string;
• and
• repeatedly delete the title strings one at a time based on the priority value until the determining unit determines that the concatenated string becomes small enough to be displayed entirely on the second portion, without deleting the separating characters from the displayed concatenated string;
• wherein the navigation creating unit deletes title strings with the lowest priority values before deleting title strings with higher priority values;
• and
• wherein, if at least two title strings are assigned with a lowest priority value, deleting one of the at least two title strings based on the hierarchical position by deleting the one of the at least two title strings indicating a screen image nearest a base screen image side of the navigation path among at least two screen images corresponding to the at least two title strings.