Dynamic text scroll control in a user interface

A computer program product comprising:

• a computer readable storage medium and program instructions stored on the computer readable storage medium, the program instructions comprising:
• program instructions to display a plurality of display elements including a first display element and a second display element on a graphical user interface at a first zoom scale size;
• program instructions to, responsive to determining that the first display element and second display element overlap when displayed on the graphical user interface at the first zoom scale size, create a first stack including at least the first display element and the second display element from among the plurality of display elements, each display element within the first stack overlapping at least one other display element included in the first stack at the first zoom scale size;
• program instructions to display, at the first zoom scale size, only the first display element on the graphical user interface to represent each display element included in the first stack, wherein:
• each display element included in the first stack is associated with a respective identifier;
• each display element included in the first stack is ordered within the first stack based on a predefined order of identifiers;
• the first display element is associated with a first identifier that is first in the predefined order of identifiers among identifiers associated with display elements included in the first stack;
• the first display element is displayed on the graphical user interface, at the first zoom scale size, based on the predefined order of identifiers;
• and
• the second display element is associated with a second identifier;
• program instructions to store one or more order relations among the plurality of display elements by storing a respective order relation pair for each order relation, each order relation pair having a first position corresponding to a display element representing a respective stack on the graphical user interface and a second position representing a display element that is hidden, from user of the graphical user interface, within the respective stack by the display element visually representing the respective stack, an order relation of the first display element and the second display element stored by a first order relation pair having the first identifier of the first display element at the first position and having the second identifier of the second display element at the second position;
• program instructions to, responsive to displaying the second display element on the graphical user interface to represent each display element included in the first stack:
• store a new order relation of the first display element and the second display element by storing a second order relation pair, the second order relation pair having the second identifier of the second display element in the first position and having the first identifier of the first display element in the second position;
• and
• delete the first order relation pair for the first display element and the second display element for conflicting with the second order relation pair.

A computer system comprising:

• one or more computer processors;
• one or more computer readable storage media;
• program instructions stored on the one or more computer readable storage media for execution by at least one of the one or more processors comprising:
• program instructions to display a plurality of display elements including a first display element and a second display element on a graphical user interface at a first zoom scale size;
• program instructions to, responsive to determining that the first display element and second display element overlap when displayed on the graphical user interface at the first zoom scale size, create a first stack including at least the first display element and the second display element from among the plurality of display elements, each display element within the first stack overlapping at least one other display element included in the first stack at the first zoom scale size;
• program instructions to display, at the first zoom scale size, only the first display element on the graphical user interface to represent each display element included in the first stack, wherein:
• each display element included in the first stack is associated with a respective identifier;
• each display element included in the first stack is ordered within the first stack based on a predefined order of identifiers;
• the first display element is associated with a first identifier that is first in the predefined order of identifiers among identifiers associated with display elements included in the first stack;
• the first display element is displayed on the graphical user interface, at the first zoom scale size, based on the predefined order of identifiers;
• and
• the second display element is associated with a second identifier;
• program instructions to store one or more order relations among the plurality of display elements by storing a respective order relation pair for each order relation, each order relation pair having a first position corresponding to a display element representing a respective stack on the graphical user interface and a second position representing a display element that is hidden, from a user of the graphical user interface, within the respective stack by the display element visually representing the respective stack, an order relation of the first display element and the second display element stored by a first order relation pair having the first identifier of the first display element at the first position and having the second identifier of the second display element at the second position;
• program instructions to, responsive to displaying the second display element on the graphical user interface to represent each display element included in the first stack:
• store a new order relation of the first display element and the second display element by storing a second order relation pair, the second order relation pair having the second identifier of the second display element in the first position and having the first identifier of the first display element in the second position;
• and
• delete the first order relation pair for the first display element and the second display element for conflicting with the second order relation pair.