diff options
Diffstat (limited to 'components/rtgui/widgets/plot.c')
| -rw-r--r-- | components/rtgui/widgets/plot.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/components/rtgui/widgets/plot.c b/components/rtgui/widgets/plot.c new file mode 100644 index 0000000000..6881295d87 --- /dev/null +++ b/components/rtgui/widgets/plot.c @@ -0,0 +1,184 @@ +/* + * File : plot.h + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2012, RT-Thread Development Team + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rt-thread.org/license/LICENSE + * + * Change Logs: + * Date Author Notes + * 2012-09-03 Grissiom first version + */ + +#include <rtgui/rtgui_system.h> +#include <rtgui/dc.h> +#include <rtgui/widgets/plot.h> + +static void _rtgui_plot_constructor(struct rtgui_plot *plot) +{ + plot->base_point.x = plot->base_point.y = 0; + plot->curve_container.curve = RT_NULL; + plot->curve_container.next = RT_NULL; + + /* init widget and set event handler */ + rtgui_object_set_event_handler(RTGUI_OBJECT(plot), rtgui_plot_event_handler); +} + +static void _free_curve_container_recursive(struct rtgui_plot_curve_container *cnt) +{ + if (!cnt) + return; + _free_curve_container_recursive(cnt->next); + rtgui_free(cnt); +} + +static void _rtgui_plot_destructor(struct rtgui_plot *plot) +{ + _free_curve_container_recursive(plot->curve_container.next); +} + +DEFINE_CLASS_TYPE(plot, "plot", + RTGUI_WIDGET_TYPE, + _rtgui_plot_constructor, + _rtgui_plot_destructor, + sizeof(struct rtgui_plot)); + +struct rtgui_plot *rtgui_plot_create(struct rtgui_plot_curve *curve) +{ + struct rtgui_plot *plot; + + plot = (struct rtgui_plot *)rtgui_widget_create(RTGUI_PLOT_TYPE); + plot->curve_container.curve = curve; + + return plot; +} +RTM_EXPORT(rtgui_plot_create); + +void rtgui_plot_destroy(struct rtgui_plot *plot) +{ + rtgui_widget_destroy(RTGUI_WIDGET(plot)); +} +RTM_EXPORT(rtgui_plot_destroy); + +void rtgui_plot_set_base_point(struct rtgui_plot *plot, rt_uint16_t x, rt_uint16_t y) +{ + plot->base_point.x = x; + plot->base_point.y = y; +} +RTM_EXPORT(rtgui_plot_set_base_point); + +void rtgui_plot_append_curve(struct rtgui_plot *plot, struct rtgui_plot_curve *curve) +{ + struct rtgui_plot_curve_container *cur_cnt, *next_cnt; + + RT_ASSERT(plot); + + next_cnt = rtgui_malloc(sizeof(*next_cnt)); + next_cnt->curve = curve; + next_cnt->next = RT_NULL; + + cur_cnt = &plot->curve_container; + while (cur_cnt->next) + { + cur_cnt = cur_cnt->next; + } + cur_cnt->next = next_cnt; +} +RTM_EXPORT(rtgui_plot_append_curve); + +static void _rtgui_plot_curve_onpaint( + struct rtgui_dc *dc, + struct rtgui_plot_curve *curve, + struct rtgui_point base) +{ + struct rtgui_rect rect; + rt_uint16_t height; + int last_x, last_y; + rtgui_color_t old_color; + + rtgui_dc_get_rect(dc, &rect); + height = rtgui_rect_height(rect); + + old_color = RTGUI_DC_FC(dc); + RTGUI_DC_FC(dc) = curve->color; + + if (curve->x_data) + { + rt_size_t i; + + last_x = curve->x_data[0] + base.x; + last_y = height - curve->y_data[0] - base.y; + for (i = 1; i < curve->length; i++) + { + int cur_x = curve->x_data[i] + base.x; + int cur_y = height - curve->y_data[i] - base.y; + rtgui_dc_draw_line(dc, + last_x, last_y, + cur_x, cur_y); + last_x = cur_x; + last_y = cur_y; + } + } + else + { + rt_size_t i; + + last_x = 0 + base.x; + last_y = height - curve->y_data[0] - base.y; + for (i = 1; i < curve->length; i++) + { + int cur_x = i + base.x; + int cur_y = height - curve->y_data[i] - base.y; + rtgui_dc_draw_line(dc, + last_x, last_y, + cur_x, cur_y); + last_x = cur_x; + last_y = cur_y; + } + } + RTGUI_DC_FC(dc) = old_color; +} + +static void _rtgui_plot_onpaint(struct rtgui_object *object, struct rtgui_event *event) +{ + struct rtgui_dc *dc; + struct rtgui_rect rect; + struct rtgui_plot *plot = RTGUI_PLOT(object); + struct rtgui_plot_curve_container *cnt; + + dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(plot)); + if (dc == RT_NULL) + return; + rtgui_widget_get_rect(RTGUI_WIDGET(object), &rect); + + rtgui_dc_fill_rect(dc, &rect); + + for (cnt = &plot->curve_container; cnt; cnt = cnt->next) + { + _rtgui_plot_curve_onpaint(dc, cnt->curve, plot->base_point); + } + + rtgui_dc_end_drawing(dc); +} + +rt_bool_t rtgui_plot_event_handler(struct rtgui_object *object, struct rtgui_event *event) +{ + struct rtgui_plot *plot; + RTGUI_WIDGET_EVENT_HANDLER_PREPARE; + + plot = RTGUI_PLOT(object); + switch (event->type) + { + case RTGUI_EVENT_PAINT: + _rtgui_plot_onpaint(object, event); + break; + default: + return rtgui_widget_event_handler(object, event); + } + + return RT_FALSE; +} +RTM_EXPORT(rtgui_plot_event_handler); + |