Predictive scrolling
A system and a method are disclosed for effectively displaying database records on a device having a display area that is small compared to the underlying data being represented. A simulated catalogue is displayed with cards associated with database records. Detailed information is presented for a record on a card obscuring information related to other records. A user is allowed to swipe on the catalogue causing simulated movement of the cards thereby displaying information associated with a database record previously obscured. The catalogue is moved with an initial velocity determined by the speed of swiping and decelerated based on a drag factor until it comes to a stop and displays information for the record reached. The ability to determine the final record displayed when the catalogue stops allows pre-fetching of the data associated with the record.
1. A computer-implemented method for graphically displaying database records on a display screen with limited display area, the method comprising:
displaying a plurality of database records from a first perspective, a first subset of the plurality of database records at least partially obscured by a first record; and
responsive to a user input, animating the display to scroll through the database records;
determining a final record from the plurality of database records to display at a conclusion of the scrolling before the scrolling comes to the conclusion;
rendering an image comprising a graphical representation of a set of data corresponding to the final record before the scrolling comes to the conclusion; and
responsive to the conclusion of the scrolling, receiving the rendered image and displaying the rendered image such that the rendered image obscures at least partially a final subset of the plurality of database records.
2. The method of claim 1 , wherein the user input is indicative of an input speed value and animating comprises displaying the database records scrolling with a speed initialized to a first speed value determined based on the input speed value.
3. The method of claim 2 , wherein the animating further comprises displaying the database records scrolling with a second speed that is less than the first speed and greater than a predetermined minimum threshold, wherein the second speed value is determined by multiplying the first speed value by a predetermined drag value.
4. The method of claim 1 , further comprising:
preloading the final record while the database records are displayed as scrolling.
5. The method of claim 1 , further comprising:
rendering a card image for displaying the final record while the database records are displayed as scrolling.
6. The method of claim 5 , further comprising:
storing the card image in a cache for retrieval prior to subsequently displaying the final record.
7. The method of claim 1 , wherein the user input includes a swiping gesture across the display screen.
8. The method of claim 1 , wherein the user input includes a swiping gesture across the display screen and an input speed value is determined based on the speed of swiping.
9. The method of claim 1 , wherein the database records are displayed on cards of a catalogue and the animation comprises moving the cards of the catalogue.
10. The method of claim 1 , wherein the database records are displayed on cards of a rolodex and the animation comprises moving the rolodex.
11. The method of claim 1 , wherein the database records represent pages of report data.
12. The method of claim 1 , wherein an obscured record displays information identifying the record.
13. The method of claim 1 , further comprising:
displaying a marker record displaying information indicative of number of database records between a database record displayed as not obscured and the marker record.
14. A system for graphically displaying database records on a display screen with limited display area, the system comprising:
a computer processor; and
a computer-readable storage medium storing computer program modules configured to execute on the computer processor, the computer program modules comprising:
an input/output driver module configured to:
display a plurality of database records from a first perspective, a first subset of the plurality of database records at least partially obscured by a first record; and
responsive to a user input, animate the display to scroll through the database records;
determine a final record from the plurality of database records to display at a conclusion of the scrolling before the scrolling comes to the conclusion;
render an image comprising a graphical representation of a set of data corresponding to the final record before the scrolling comes to the conclusion; and
responsive to the conclusion of the scrolling, receive the rendered image and displaying the rendered image such that the rendered image obscures at least partially a final subset of the plurality of database records.
15. The system of claim 14 , wherein the input/output driver module is further configured to:
preload the final record while the database records are displayed as scrolling.
16. The system of claim 14 , wherein the input/output driver module is further configured to:
render a card image for displaying the final record while the database records are displayed as scrolling.
17. The system of claim 16 , wherein the input/output driver module is further configured to:
store the card image in a cache for retrieval prior to subsequently displaying the final record.
18. A computer program product having a non-transitory computer-readable storage medium storing computer-executable code for graphically displaying database records on a display screen with limited display area, the code comprising:
an input/output driver module configured to:
display a plurality of database records from a first perspective, a first subset of the plurality of database records at least partially obscured by a first record; and
responsive to a user input, animate the display to scroll through the database records;
determine a final record from the plurality of database records to display at a conclusion of the scrolling before the scrolling comes to the conclusion;
render an image comprising a graphical representation of a set of data corresponding to the final record before the scrolling comes to the conclusion; and
responsive to the conclusion of the scrolling, receive the rendered image and displaying the rendered image such that the rendered image obscures at least partially a final subset of the plurality of database records.
19. The computer program product of claim 18 , wherein the input/output driver module is further configured to:
preload the final record while the database records are displayed as scrolling.
20. The computer program product of claim 18 , wherein the input/output driver module is further configured to:
render a card image for displaying the final record while the database records are displayed as scrolling.
21. The computer program product of claim 20 , wherein the input/output driver module is further configured to:
store the card image in a cache for retrieval prior to subsequently displaying the final record.