#include #include "mywidget.h" /* 控件绘图函数 */ static void rtgui_mywidget_ondraw(struct rtgui_mywidget* me) { struct rtgui_dc* dc; struct rtgui_rect rect; rt_uint16_t x, y; /* 获得目标DC,开始绘?*/ dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(me)); if (dc == RT_NULL) return; /* 获得窗口的尺?*/ rtgui_widget_get_rect(RTGUI_WIDGET(me), &rect); /* 绘制背景?*/ RTGUI_DC_BC(dc) = white; rtgui_dc_fill_rect(dc, &rect); /* 计算中心原点 */ x = (rect.x2 + rect.x1)/2; y = (rect.y2 + rect.y1)/2; /* 绘制十字?*/ RTGUI_DC_FC(dc) = black; rtgui_dc_draw_hline(dc, rect.x1, rect.x2, y); rtgui_dc_draw_vline(dc, x, rect.y1, rect.y2); /* 根据状态绘制圆?*/ if (me->status == MYWIDGET_STATUS_ON) RTGUI_DC_FC(dc) = green; else RTGUI_DC_FC(dc) = red; rtgui_dc_fill_circle(dc, x, y, 5); /* 结束绘图 */ rtgui_dc_end_drawing(dc); return; } /* 鼠标事件处理函数 */ static void rtgui_mywidget_onmouse(struct rtgui_mywidget* me, struct rtgui_event_mouse* mouse) { struct rtgui_rect rect; rt_uint16_t x, y; /* 仅对鼠标抬起动作进行处理 */ if (!(mouse->button & RTGUI_MOUSE_BUTTON_UP)) return; /* 获得控件的位?*/ rtgui_widget_get_rect(RTGUI_WIDGET(me), &rect); /* get_rect函数获得是控件的相对位置,而鼠标事件给出的坐标是绝对坐标,需要做一个转?*/ rtgui_widget_rect_to_device(RTGUI_WIDGET(me), &rect); /* 计算中心原点 */ x = (rect.x2 + rect.x1)/2; y = (rect.y2 + rect.y1)/2; /* 比较鼠标坐标是否在圈?*/ if ((mouse->x < x + 5 && mouse->x > x - 5) && (mouse->y < y + 5 && mouse->y > y - 5)) { /* 更改控件状?*/ if (me->status & MYWIDGET_STATUS_ON) me->status = MYWIDGET_STATUS_OFF; else me->status = MYWIDGET_STATUS_ON; /* 刷新(重新绘制)控件 */ rtgui_mywidget_ondraw(me); } } /* mywidget控件的事件处理函?*/ rt_bool_t rtgui_mywidget_event_handler(struct rtgui_object* object, struct rtgui_event* event) { /* 调用事件处理函数时,widget指针指向控件本身,所以先获得相应控件对象的指?*/ struct rtgui_mywidget* me = RTGUI_MYWIDGET(object); switch (event->type) { case RTGUI_EVENT_PAINT: /* 绘制事件,调用绘图函数绘?*/ rtgui_mywidget_ondraw(me); break; case RTGUI_EVENT_MOUSE_BUTTON: /* 鼠标事件 */ rtgui_mywidget_onmouse(RTGUI_MYWIDGET(me), (struct rtgui_event_mouse*) event); break; /* 其他事件调用父类的事件处理函?*/ default: return rtgui_widget_event_handler(object, event); } return RT_FALSE; } /* 自定义控件的构造函?*/ static void _rtgui_mywidget_constructor(rtgui_mywidget_t *mywidget) { /* 默认这个控件接收聚焦 */ RTGUI_WIDGET(mywidget)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE; /* 初始化控件并设置事件处理函数 */ rtgui_object_set_event_handler(RTGUI_OBJECT(mywidget), rtgui_mywidget_event_handler); /* 初始状态时OFF */ mywidget->status = MYWIDGET_STATUS_OFF; } DEFINE_CLASS_TYPE(mywidget, "mywidget", RTGUI_WIDGET_TYPE, _rtgui_mywidget_constructor, RT_NULL, sizeof(struct rtgui_mywidget)); /* 创建一个自定义控件 */ struct rtgui_mywidget* rtgui_mywidget_create(rtgui_rect_t* r) { struct rtgui_mywidget* me; /* 让rtgui_widget创建出一个指定类型:RTGUI_MYWIDGET_TYPE类型的控?*/ me = (struct rtgui_mywidget*) rtgui_widget_create (RTGUI_MYWIDGET_TYPE); if (me != RT_NULL) { rtgui_widget_set_rect(RTGUI_WIDGET(me), r); } return me; } /* 删除一个自定义控件 */ void rtgui_mywidget_destroy(struct rtgui_mywidget* me) { rtgui_widget_destroy(RTGUI_WIDGET(me)); }