Stylus movement translation switching

A touch-sensitive display device, comprising:

• a touch-sensitive display;
• a logic machine;
• and
• a storage machine holding instructions executable by the logic machine to:
• at the touch-sensitive display, detect a first real-world movement of a stylus from a first surface position to a second surface position, the second surface position being separated from the first surface position by a first real-world movement distance;
• use an absolute movement translation to translate the first real-world movement of the stylus into a corresponding first virtual movement from a first virtual input position substantially aligned with the first surface position to a second virtual input position, such that the second virtual input position is substantially aligned with the second surface position, and a first virtual movement distance between the first virtual input position and the second virtual input position is substantially equal to the first real-world movement distance;
• based at least in part on one or more movement translation context parameters, switch translation of stylus movements from the absolute movement translation to a relative movement translation;
• detect a second real-world movement of the stylus from the second surface position to a third surface position separated from the second surface position by a second real-world movement distance;
• and
• use the relative movement translation to translate the second real-world movement of the stylus into a corresponding second virtual movement from the second virtual input position to a third virtual input position, such that a second virtual movement distance between the second virtual input position and the third virtual input position is different from the second real-world movement distance;
• wherein the relative movement translation uses a first movement translation function to translate the second real-world movement of the stylus into the corresponding second virtual movement when a tip of the stylus is contacting a surface of the touch-sensitive display, and a second movement translation function to translate the second real-world movement of the stylus into the corresponding second virtual movement when the tip of the stylus is spaced away from the surface of the touch-sensitive display;
• and
• wherein the first movement translation function and the second movement translation function differ with respect to the second virtual movement distance for the second real-world movement of the stylus, and wherein the first movement translation function assigns a different weighting to a detected speed or a detected acceleration of the stylus as compared to the second movement translation function.

A method for a touch-sensitive display device, the method comprising:

• at a touch-sensitive display of the touch-sensitive display device, detecting a first real-world movement of a stylus from a first surface position to a second surface position, the second surface position being separated from the first surface position by a first real-world movement distance;
• based at least in part on determining that one or both of the first and second surface positions fall within a virtual trackpad region of the touch-sensitive display, using a relative movement translation to translate the first real-world movement of the stylus into a corresponding first virtual movement from a first virtual input position to a second virtual input position, such that a first virtual movement distance between the first virtual input position and the second virtual input position is greater than the first real-world movement distance;
• detecting a second real-world movement of the stylus from the second surface position to a third surface position separated from the second surface position by a second real-world movement distance;
• based at least in part on the third surface position falling outside the virtual trackpad region, switching translation of stylus movements from the relative movement translation to an absolute movement translation;
• and
• using the absolute movement translation, translating the second real-world movement of the stylus into a corresponding second virtual movement from the second virtual input position to a third virtual input position, such that a second virtual movement distance between the second virtual input position and the third virtual input position is substantially equal to the second real-world movement distance;
• wherein the relative movement translation uses a first movement translation function to translate the first real-world movement of the stylus into the corresponding first virtual movement when a tip of the stylus is contacting a surface of the touch-sensitive display, and a second movement translation function to translate the first real-world movement of the stylus into the corresponding first virtual movement when the tip of the stylus is spaced away from the surface of the touch-sensitive display;
• and
• wherein the first movement translation function and the second movement translation function differ with respect to the first virtual movement distance for the first real-world movement of the stylus, and wherein the first movement translation function assigns a different weighting to a detected speed or a detected acceleration of the stylus as compared to the second movement translation function.