Abstract: Dynamically resizable UI views for electronic devices are disclosed. The dynamically resizable UI views may be UI views for widgets. In one or more implementations, an application provides, to a system process, multiple states for a user interface (UI) view for the application, and one or more transition definitions each defining a transition between two of the multiple states. When a user, or content of the UI view, triggers a change from one of the multiples states to another of the multiple states of the UI view, the system process may animate the change according to the one or more transition definitions. In one or more implementations, an application provides system animated transitions between application UI States, and provides application data to be displayed in the rendered UI view.

Abstract: An electronic device detects an input via an input device. In response to detecting the input, the device monitors the input using a gesture recognition tree having a plurality of nodes. Each respective node of the gesture recognition tree corresponds to a respective gesture recognizer or a respective component gesture recognizer, and one or more nodes include one or more parameters that describe the input. Monitoring the input using the gesture recognition tree includes: processing the input using a first node of the plurality of nodes, including determining a value of a first parameter of the one or more parameters; conveying the first parameter from the first node to a second node of the plurality of nodes; and processing the input using the second node, including determining, based on the first parameter, whether the input satisfies a gesture recognition requirement defined by the second node.

Abstract: The subject technology receives a command to initiate an application. The subject technology, in response to the command, generates a root node related to a root view of a first hierarchy of views representing a user interface (UI). The subject technology generates a child node of the root node for including in the first hierarchy of views, the child node corresponding to a first type of view. The subject technology generates a first child node of the child node for including in the first hierarchy of views, the first child node corresponding to a second type of view. The subject technology generates a graph including nodes, each node corresponding to a different attribute of the UI, wherein the root node, the child node, and the first child node have relationships with respective nodes from the graph.

Abstract: The subject technology sends, from a parent node of a hierarchy of views, information related to a preference list, the preference list include preference keys corresponding to respective attributes of a UI, where the hierarchy of views represents the UI. The subject technology receives, at a child node of the parent node, the information related to the preference list. The subject technology updates, by the child node, a particular preference key from the preference list to a particular value, the particular preference key related to an attribute of the UI.

Abstract: An electronic device detects an input via an input device. In response to detecting the input, the device monitors the input using a gesture recognition tree having a plurality of nodes. Each respective node of the gesture recognition tree corresponds to a respective gesture recognizer or a respective component gesture recognizer, and one or more nodes include one or more parameters that describe the input. Monitoring the input using the gesture recognition tree includes: processing the input using a first node of the plurality of nodes, including determining a value of a first parameter of the one or more parameters; conveying the first parameter from the first node to a second node of the plurality of nodes; and processing the input using the second node, including determining, based on the first parameter, whether the input satisfies a gesture recognition requirement defined by the second node.

Abstract: An electronic device displays, on a display, a user interface of an application. The user interface includes a plurality of views arranged in a view hierarchy that defines a first relationship between a first view and a second view. The first view includes a first gesture recognizer, and the second view includes a second gesture recognizer. The device detects, via the input device, an input at a first location that corresponds to the displayed user interface, and processes the input using a gesture recognition hierarchy that includes the first gesture recognizer and the second gesture recognizer. A second relationship between the first gesture recognizer and the second gesture recognizer is determined based on the first relationship between the first view and the second view in the view hierarchy.

Abstract: The embodiments herein describe a mode of applications on the portable electronic device that improves single-handed operation of the devices. For example, the embodiments herein describe an ergonomic mode of an application that displays the graphical user interface (GUI) of the application in a bottom area of the display screen of the electronic device to allow the user to more easily interact with objects. The embodiments herein also describe an ergonomic mode of a keyboard displayed on the display screen of the portable electronic device. During the ergonomic mode of the keyboard, the keyboard is shifted towards a vertical edge of the display screen to allow a user to more easily reach keys of the keyboard that were previously unreachable without the user switching to two handed operation of the device or repositioning the electronic device in the user's hand.

Abstract: An electronic device with a touch-sensitive surface displays a user interface of a first software application that is updated at a first display rate. While displaying a first frame of the user interface in accordance with the first display rate, the device detects respective movement of a touch input across the touch-sensitive surface. An application-independent touch processing module of the device selects a respective touch location of the touch input that was detected during the respective movement to identify as a representative touch location for the respective movement based on touch-processing criteria for the first software application, and sends to an application-specific portion of the first software application touch location information for the touch input that identifies the respective touch location as the representative touch location for the respective movement. The first software application updates the user interface in accordance with the touch location information.

Abstract: Implementations of the subject technology provide a framework to support creating user interfaces (UI) and animations within the UIs. The subject technology receives first information related to an animation, the first information including an initial state, a destination state, and an animation function. The subject technology generates a copy of the destination state, the copy of the destination state comprising a record for the animation based at least in part on the first information related to the animation and further information related to the animation function. The subject technology updates a value related to an intermediate state of the animation in the copy of the destination state, the intermediate state being between the initial state and the destination state. Further, the subject technology provides the copy of the destination state that includes the value related to the intermediate state for rendering the animation.

Abstract: An electronic device displays, on a display, a user interface of an application. The user interface includes a plurality of views arranged in a view hierarchy that defines a first relationship between a first view and a second view. The first view includes a first gesture recognizer, and the second view includes a second gesture recognizer. The device detects, via the input device, an input at a first location that corresponds to the displayed user interface, and processes the input using a gesture recognition hierarchy that includes the first gesture recognizer and the second gesture recognizer. A second relationship between the first gesture recognizer and the second gesture recognizer is determined based on the first relationship between the first view and the second view in the view hierarchy.

Abstract: An electronic device detects an input via an input device. In response to detecting the input, the device monitors the input using a gesture recognizer. The gesture recognizer includes a plurality of component gesture recognizers that define requirements for recognition of a gesture. A first component gesture recognizer from the plurality of component gesture recognizers defines a first requirement for recognition of the gesture, and a second component gesture recognizer from the plurality of component gesture recognizers defines a second requirement for recognition of the gesture. In accordance with a determination that the input satisfies first gesture recognition criteria that include the first requirement of the first component gesture recognizer and the second requirement of the second component gesture recognizer, the device recognizes a first gesture using the gesture recognizer.

Abstract: The embodiments herein describe a mode of applications on the portable electronic device that improves single-handed operation of the devices. For example, the embodiments herein describe an ergonomic mode of an application that displays the graphical user interface (GUI) of the application in a bottom area of the display screen of the electronic device to allow the user to more easily interact with objects. The embodiments herein also describe an ergonomic mode of a keyboard displayed on the display screen of the portable electronic device. During the ergonomic mode of the keyboard, the keyboard is shifted towards a vertical edge of the display screen to allow a user to more easily reach keys of the keyboard that were previously unreachable without the user switching to two handed operation of the device or repositioning the electronic device in the user's hand.

Abstract: An electronic device with a touch-sensitive surface displays a user interface of a first software application that is updated at a first display rate. While displaying a first frame of the user interface in accordance with the first display rate, the device detects respective movement of a touch input across the touch-sensitive surface. An application-independent touch processing module of the device selects a respective touch location of the touch input that was detected during the respective movement to identify as a representative touch location for the respective movement based on touch-processing criteria for the first software application, and sends to an application-specific portion of the first software application touch location information for the touch input that identifies the respective touch location as the representative touch location for the respective movement. The first software application updates the user interface in accordance with the touch location information.

Abstract: The embodiments herein describe a mode of applications on the portable electronic device that improves single-handed operation of the devices. For example, the embodiments herein describe an ergonomic mode of an application that displays the graphical user interface (GUI) of the application in a bottom area of the display screen of the electronic device to allow the user to more easily interact with objects. The embodiments herein also describe an ergonomic mode of a keyboard displayed on the display screen of the portable electronic device. During the ergonomic mode of the keyboard, the keyboard is shifted towards a vertical edge of the display screen to allow a user to more easily reach keys of the keyboard that were previously unreachable without the user switching to two handed operation of the device or repositioning the electronic device in the user's hand.

Abstract: An electronic device, with a touch-sensitive surface and display, displays a user interface at a first display rate. While displaying the user interface, the device detects movement of a touch input across the touch-sensitive surface at a first detection rate that is higher than the first display rate. An application-independent touch processing module sends to an application-specific portion of the first software application touch location information for the touch input that identifies: one or more predicted locations of the touch input on the touch-sensitive surface, and one or more predicted intensity values of the touch input at one or more intensity locations of the touch input on the touch-sensitive surface. The first software application processes the touch location information and updated the user interface accordingly.

Abstract: An electronic device detects an input via an input device. In response to detecting the input, the device monitors the input using a gesture recognizer. The gesture recognizer includes a plurality of component gesture recognizers that define requirements for recognition of a gesture. A first component gesture recognizer from the plurality of component gesture recognizers defines a first requirement for recognition of the gesture, and a second component gesture recognizer from the plurality of component gesture recognizers defines a second requirement for recognition of the gesture. In accordance with a determination that the input satisfies first gesture recognition criteria that include the first requirement of the first component gesture recognizer and the second requirement of the second component gesture recognizer, the device recognizes a first gesture using the gesture recognizer.

Abstract: Implementations of the subject technology provide a framework to support creating user interfaces (UI) and animations within the UIs. The subject technology receives first information related to an animation, the first information including an initial state, a destination state, and an animation function. The subject technology generates a copy of the destination state, the copy of the destination state comprising a record for the animation based at least in part on the first information related to the animation and further information related to the animation function. The subject technology updates a value related to an intermediate state of the animation in the copy of the destination state, the intermediate state being between the initial state and the destination state. Further, the subject technology provides the copy of the destination state that includes the value related to the intermediate state for rendering the animation.

Abstract: The subject technology sends, from a parent node of a hierarchy of views, information related to a preference list, the preference list include preference keys corresponding to respective attributes of a UI, where the hierarchy of views represents the UI. The subject technology receives, at a child node of the parent node, the information related to the preference list. The subject technology updates, by the child node, a particular preference key from the preference list to a particular value, the particular preference key related to an attribute of the UI.

Abstract: The subject technology receives a command to initiate an application. The subject technology, in response to the command, generates a root node related to a root view of a first hierarchy of views representing a user interface (UI). The subject technology generates a child node of the root node for including in the first hierarchy of views, the child node corresponding to a first type of view. The subject technology generates a first child node of the child node for including in the first hierarchy of views, the first child node corresponding to a second type of view. The subject technology generates a graph including nodes, each node corresponding to a different attribute of the UI, wherein the root node, the child node, and the first child node have relationships with respective nodes from the graph.

Abstract: An electronic device, with a touch-sensitive surface and display, displays a user interface at a first display rate. While displaying the user interface in accordance with the first display rate, the device detects movement of a touch input, including detecting the touch input at a first set of sequential locations on the touch-sensitive surface, including a plurality of locations on the touch-sensitive surface, and predicts for the touch input a first set of one or more predicted locations on the touch-sensitive surface based on multiple locations in the first set of sequential locations. The device updates the user interface in accordance with the first set of one or more predicted locations of the touch input on the touch-sensitive surface.