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 first database record on a first face of a cube;and
responsive to a user input, animating the display to rotate the cube;
determining a final record from the plurality of database records to display at a conclusion of the rotation before the rotation comes to the conclusion;
rendering an image of the cube displaying the final record before the rotation comes to the conclusion; and
responsive to the conclusion of the rotation, receiving the rendered image and displaying the rendered image on a second face of the cube.
2. The method of claim 1 , wherein the user input is indicative of an input speed value and animating comprises displaying the cube rotating 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 cube rotating 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 cube is displayed as rotating.
5. The method of claim 1 , further comprising:
rendering an image of the second face of the cube for displaying the final record while the cube is displayed as rotating.
6. The method of claim 5 , further comprising:
storing the image of the second face of the cube 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 represent pages of report data.
10. 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 first database record on a first face of a cube;
responsive to a user input, animating the display to rotate the cube;
determine a final record from the plurality of database records to display at a conclusion of the rotation before the rotation comes to the conclusion;
render an image of the cube displaying the final record before the rotation comes to the conclusion; and
responsive to the conclusion of the rotation, receive the rendered image and displaying the rendered image on a second face of the cube.
11. The system of claim 10 , wherein the user input is indicative of an input speed value and animating comprises displaying the cube rotating with a speed initialized to a first speed value determined based on the input speed value.
12. The system of claim 11 , wherein the animating further comprises displaying the cube rotating 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.
13. The system of claim 10 , wherein the input/output driver module is further configured to:
preload the final record while the cube is displayed as rotating.
14. The system of claim 10 , wherein the input/output driver module is further configured to:
render an image of the second face of the cube for displaying the final record while the cube is displayed as rotating.
15. The system of claim 14 , wherein the input/output driver module is further configured to:
store the image of the second face of the cube in a cache for retrieval prior to subsequently displaying the final record.
16. The system of claim 14 , wherein the user input includes a swiping gesture across the display screen, and wherein the input/output driver module is configured to determine an input speed value based on the speed of swiping.
17. 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 first database record on a first face of a cube;
responsive to a user input, animating the display to rotate the cube;
determine a final record from the plurality of database records to display at a conclusion of the rotation before the rotation comes to the conclusion;
render an image of the cube displaying the final record before the rotation comes to the conclusion; and
responsive to the conclusion of the rotation, receive the rendered image and displaying the rendered image on a second face of the cube.
18. The computer program product of claim 17 , wherein the input/output driver module is further configured to:
preload the final record while the cube is displayed as rotating.
19. The computer program product of claim 17 , wherein the input/output driver module is further configured to:
render an image of the second face of the cube for displaying the final record while the cube is displayed as rotating.
20. The computer program product of claim 19 , wherein the input/output driver module is further configured to:
store the image of the second face of the cube in a cache for retrieval prior to subsequently displaying the final record.