5d4d719064
A mouse click is defined as pressing the mouse and then releasing it over a given spot. Add a function the tracks the mouse state and returns the most recent mouse click, if any. Signed-off-by: Simon Glass <sjg@chromium.org>
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Mouse/trackpad/touchscreen input uclass
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*
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* Copyright 2020 Google LLC
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*/
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#ifndef _MOUSE_H
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#define _MOUSE_H
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#include <stdbool.h>
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struct udevice;
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enum mouse_ev_t {
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MOUSE_EV_NULL,
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MOUSE_EV_MOTION,
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MOUSE_EV_BUTTON,
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};
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enum mouse_state_t {
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BUTTON_LEFT = 1 << 0,
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BUTTON_MIDDLE = 1 << 1,
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BUTTON_RIGHT = 1 << 2,
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BUTTON_SCROLL_PLUS = 1 << 3,
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BUTTON_SCROLL_MINUS = 1 << 4,
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};
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enum mouse_press_state_t {
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BUTTON_RELEASED = 0,
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BUTTON_PRESSED,
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};
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/**
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* struct mouse_uc_priv - private data for mouse uclass
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*
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* @left_button_state: Current state of left button (BUTTON_PRESSED/BUTTON_RELEASED)
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* @click_x: X coordinate where the click occurred
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* @click_y: Y coordinate where the click occurred
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*/
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struct mouse_uc_priv {
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enum mouse_press_state_t left_button_state;
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int click_x;
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int click_y;
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};
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/**
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* struct mouse_event - information about a mouse event
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*
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* @type: Mouse event ype
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*/
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struct mouse_event {
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enum mouse_ev_t type;
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union {
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/**
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* @state: Mouse state (enum mouse_state_t bitmask)
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* @x: X position of mouse
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* @y: Y position of mouse
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* @xrel: Relative motion in X direction
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* @yrel: Relative motion in Y direction
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*/
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struct mouse_motion {
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unsigned char state;
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unsigned short x;
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unsigned short y;
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short xrel;
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short yrel;
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} motion;
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/**
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* @button: Button number that was pressed/released (BUTTON_...)
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* @state: BUTTON_PRESSED / BUTTON_RELEASED
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* @clicks: number of clicks (normally 1; 2 = double-click)
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* @x: X position of mouse
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* @y: Y position of mouse
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*/
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struct mouse_button {
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unsigned char button;
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unsigned char press_state;
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unsigned char clicks;
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unsigned short x;
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unsigned short y;
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} button;
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};
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};
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struct mouse_ops {
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int (*get_event)(struct udevice *dev, struct mouse_event *event);
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};
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#define mouse_get_ops(dev) ((struct mouse_ops *)(dev)->driver->ops)
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int mouse_get_event(struct udevice *dev, struct mouse_event *event);
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/**
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* mouse_get_click() - Check if a left mouse button click has occurred
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*
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* @dev: Mouse device
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* @xp: Returns X coordinate of click (can be NULL)
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* @yp: Returns Y coordinate of click (can be NULL)
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* Returns: 0 if a click has occurred, -EAGAIN if no click pending
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*/
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int mouse_get_click(struct udevice *dev, int *xp, int *py);
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#endif
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