Check if an OpenCV window is open. From: https://stackoverflow.com/a/48055987/29827

Query the mouse for events in a particular button. This function behave exactly like `cvui::mouse(int theQuery)`, with the difference that quer

Query the mouse for events, e.g. "is any button down now?". Available queries are: * `cvui::DOWN`: any mouse button was pressed. `cvui::mouse()`

Return the last position of the mouse. \param theWindowName name of the window whose mouse cursor will be used. If nothing is informed (default)

Update the library internal things. You need to call this function **AFTER** you are done adding/manipulating UI elements in order for them to reac

Start a new column. One of the most annoying tasks when building UI is to calculate where each component should be placed on the screen. cvui has

Start a new row. One of the most annoying tasks when building UI is to calculate where each component should be placed on the screen. cvui has a

Display a button. The size of the button will be automatically adjusted to properly house the label content. Parameters ---------- theWhere: np

Display a checkbox. You can use the state parameter to monitor if the checkbox is checked or not. Parameters ---------- theWhere: np.ndarray

Inform cvui that all subsequent component calls belong to a window in particular. When using cvui with multiple OpenCV windows, you must call cvui

Display a counter for integer values that the user can increase/descrease by clicking the up and down arrows. Parameters ---------- theWhere: n

End a column. You must call this function only if you have previously called its counter part, i.e. `beginColumn()`. See Also ---------- beginC

End a row. You must call this function only if you have previously called its counter part, the `beginRow()` function. See Also ---------- begi

Create an interaction area that reports activity with the mouse cursor. The tracked interactions are returned by the function and they are: `OUT`

Display an image (np.ndarray). Parameters ---------- theWhere: np.ndarray image/frame where the provded image should be rendered. theX: int

Display an image in the specified window and update the internal structures of cvui. This function can be used as a replacement for `cv2.imshow()`.

Initializes cvui. You must provide the name of the window where components will be added. It is also possible to tell cvui to handle OpenCV's even

Return the last key that was pressed. This function will only work if a value greater than zero was passed to `cvui.init()` as the delay waitkey p