93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
#pragma once
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#include <input/input.h>
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#include "canvas.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct ViewPort ViewPort;
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typedef enum {
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ViewPortOrientationHorizontal,
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ViewPortOrientationVertical,
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} ViewPortOrientation;
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/*
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* ViewPort Draw callback
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* @warning called from GUI thread
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*/
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typedef void (*ViewPortDrawCallback)(Canvas* canvas, void* context);
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/*
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* ViewPort Input callback
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* @warning called from GUI thread
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*/
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typedef void (*ViewPortInputCallback)(InputEvent* event, void* context);
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/*
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* ViewPort allocator
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* always returns view_port or stops system if not enough memory.
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*/
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ViewPort* view_port_alloc();
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/*
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* ViewPort deallocator
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* Ensure that view_port was unregistered in GUI system before use.
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*/
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void view_port_free(ViewPort* view_port);
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/*
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* Set view_port width.
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* Will be used to limit canvas drawing area and autolayout feature.
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* @param width - wanted width, 0 - auto.
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*/
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void view_port_set_width(ViewPort* view_port, uint8_t width);
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uint8_t view_port_get_width(ViewPort* view_port);
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/*
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* Set view_port height.
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* Will be used to limit canvas drawing area and autolayout feature.
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* @param height - wanted height, 0 - auto.
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*/
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void view_port_set_height(ViewPort* view_port, uint8_t height);
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uint8_t view_port_get_height(ViewPort* view_port);
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/*
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* Enable or disable view_port rendering.
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* @param view_port - ViewPort instance
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* @param enabled
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* @warning automatically dispatches update event
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*/
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void view_port_enabled_set(ViewPort* view_port, bool enabled);
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bool view_port_is_enabled(ViewPort* view_port);
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/*
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* ViewPort event callbacks
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* @param callback - appropriate callback function
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* @param context - context to pass to callback
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*/
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void view_port_draw_callback_set(ViewPort* view_port, ViewPortDrawCallback callback, void* context);
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void view_port_input_callback_set(
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ViewPort* view_port,
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ViewPortInputCallback callback,
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void* context);
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/*
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* Emit update signal to GUI system.
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* Rendering will happen later after GUI system process signal.
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*/
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void view_port_update(ViewPort* view_port);
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/*
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* Set ViewPort orientation.
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* @param orientation, display orientation, horizontal or vertical.
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*/
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void view_port_set_orientation(ViewPort* view_port, ViewPortOrientation orientation);
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ViewPortOrientation view_port_get_orientation(const ViewPort* view_port);
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#ifdef __cplusplus
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}
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#endif
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