/* * File : scrollbar.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006 - 2009, 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 * 2010-08-09 Bernard first version */ #include #include static void _rtgui_scrollbar_constructor(rtgui_scrollbar_t *bar) { struct rtgui_rect rect = {0, 0, RTGUI_DEFAULT_SB_WIDTH, RTGUI_DEFAULT_SB_HEIGHT}; /* set event handler */ rtgui_widget_set_event_handler(RTGUI_WIDGET(bar), rtgui_scrollbar_event_handler); rtgui_scrollbar_set_range(bar, 0, 100); rtgui_scrollbar_set_page_step(bar, 20); rtgui_scrollbar_set_line_step(bar, 10); bar->status = 0; bar->thumb_position = 0; bar->thumb_size = 16; bar->on_scroll = RT_NULL; bar->orient = RTGUI_HORIZONTAL; rtgui_widget_set_rect(RTGUI_WIDGET(bar), &rect); /* set gc */ RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(bar)) = RTGUI_ALIGN_CENTER_HORIZONTAL | RTGUI_ALIGN_CENTER_VERTICAL; } rt_inline rt_uint32_t _rtgui_scrollbar_get_length(rtgui_scrollbar_t *bar) { struct rtgui_rect rect; rtgui_widget_get_rect(RTGUI_WIDGET(bar), &rect); if (bar->orient & RTGUI_VERTICAL) return rect.y2 - 2 * (rect.x2 - rect.x1); return rect.x2 - 2 * (rect.y2 - rect.y1); } rt_inline rt_uint32_t _rtgui_scrollbar_get_thumb_position(rtgui_scrollbar_t* bar) { rt_uint32_t thumb_position; /* calculate thumb position */ thumb_position = (rtgui_scrollbar_get_value(bar) - bar->min_position) * _rtgui_scrollbar_get_length(bar) / (bar->max_position - bar->min_position); return thumb_position; } void rtgui_scrollbar_get_thumb_rect(rtgui_scrollbar_t *bar, rtgui_rect_t *rect) { struct rtgui_rect scrollbar_rect; rtgui_widget_get_rect(RTGUI_WIDGET(bar), &scrollbar_rect); if (bar->orient & RTGUI_VERTICAL) { rt_uint32_t btn_width = scrollbar_rect.x2 - scrollbar_rect.x1; /* vertical scroll bar */ rect->x1 = scrollbar_rect.x1; rect->x2 = scrollbar_rect.x2; rect->y1 = scrollbar_rect.y1 + btn_width + _rtgui_scrollbar_get_thumb_position(bar); rect->y2 = rect->y1 + btn_width; } else { rt_uint32_t btn_height = scrollbar_rect.y2 - scrollbar_rect.y1; /* horizontal scroll bar */ rect->x1 = scrollbar_rect.x1 + btn_height + _rtgui_scrollbar_get_thumb_position(bar); rect->x2 = rect->x1 + btn_height; rect->y1 = scrollbar_rect.y1; rect->y2 = scrollbar_rect.y2; } } rtgui_type_t *rtgui_scrollbar_type_get(void) { static rtgui_type_t *scrollbar_type = RT_NULL; if (!scrollbar_type) { scrollbar_type = rtgui_type_create("scrollbar", RTGUI_WIDGET_TYPE, sizeof(rtgui_scrollbar_t), RTGUI_CONSTRUCTOR(_rtgui_scrollbar_constructor), RT_NULL); } return scrollbar_type; } static void _rtgui_scrollbar_on_mouseclick(struct rtgui_widget * widget, struct rtgui_event * event) { rtgui_rect_t rect, btn_rect, bar_rect; rt_uint32_t thumb_size, thumb_position; struct rtgui_scrollbar* bar = (struct rtgui_scrollbar*)widget; struct rtgui_event_mouse* mouse = (struct rtgui_event_mouse*)event; /* get the thumb size and position */ thumb_size = bar->thumb_size * (bar->max_position - bar->min_position) / _rtgui_scrollbar_get_length(bar); thumb_position = _rtgui_scrollbar_get_thumb_position(bar); if (bar->orient == RTGUI_VERTICAL) { /* get up arrow button rect */ btn_rect.x1 = widget->extent.x1; btn_rect.x2 = widget->extent.x2; btn_rect.y1 = widget->extent.y1; btn_rect.y2 = widget->extent.y1 + (widget->extent.x2 - widget->extent.x1); if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { bar->status |= SBS_UPARROW; /* line step */ bar->thumb_position -= bar->line_step; if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position; } else if (mouse->button & RTGUI_MOUSE_BUTTON_UP) { bar->status = 0; } goto __exit; } /* get bar rect */ bar_rect.x1 = widget->extent.x1; bar_rect.x2 = widget->extent.x2; bar_rect.y1 = widget->extent.y1 + (widget->extent.x2 - widget->extent.x1); bar_rect.y2 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1); if (rtgui_rect_contains_point(&bar_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { /* page step */ if (mouse->y < bar_rect.y1 + thumb_position) { bar->thumb_position -= bar->page_step; if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position; } else if (mouse->y > thumb_position + bar->thumb_size) { bar->thumb_position += bar->page_step; if (bar->thumb_position > bar->max_position - thumb_size) bar->thumb_position = bar->max_position - thumb_size; } } goto __exit; } /* get down arrow button rect */ btn_rect.y1 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1); btn_rect.y2 = widget->extent.y2; bar_rect.y1 = widget->extent.y1 + ((widget->extent.y2 - widget->extent.y1)/2); bar_rect.y2 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1); if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { bar->status |= SBS_DOWNARROW; /* line step */ bar->thumb_position += bar->line_step; if (bar->thumb_position > bar->max_position - thumb_size) bar->thumb_position = bar->max_position - thumb_size; } else if (mouse->button & RTGUI_MOUSE_BUTTON_UP) bar->status = 0; } } else { /* get left arrow button rect */ btn_rect.x1 = widget->extent.x1; btn_rect.x2 = widget->extent.x1 + (widget->extent.y2 - widget->extent.y1); btn_rect.y1 = widget->extent.y1; btn_rect.y2 = widget->extent.y2; if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { bar->status |= SBS_LEFTARROW; /* line step */ bar->thumb_position -= bar->line_step; if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position; } else if (mouse->button & RTGUI_MOUSE_BUTTON_UP) bar->status = 0; goto __exit; } /* get bar rect */ bar_rect.x1 = widget->extent.x1 + (widget->extent.y2 - widget->extent.y1); bar_rect.x2 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1); bar_rect.y1 = widget->extent.y1; bar_rect.y2 = widget->extent.y2; if (rtgui_rect_contains_point(&bar_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { /* page step */ if (mouse->x < bar_rect.x1 + thumb_position) { bar->thumb_position -= bar->page_step; if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position; } else if (mouse->x > thumb_position + bar->thumb_size) { bar->thumb_position += bar->page_step; if (bar->thumb_position > bar->max_position - thumb_size) bar->thumb_position = bar->max_position - thumb_size; } } goto __exit; } /* get right arrow button rect */ btn_rect.x1 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1); btn_rect.x2 = widget->extent.x2; bar_rect.x1 = widget->extent.x1 + ((widget->extent.x2 - widget->extent.x1)/2); bar_rect.x2 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1); if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK) { if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { bar->status |= SBS_RIGHTARROW; /* line step */ bar->thumb_position += bar->line_step; if (bar->thumb_position > bar->max_position - bar->line_step) bar->thumb_position = bar->max_position - bar->line_step; } else if (mouse->button & RTGUI_MOUSE_BUTTON_UP) bar->status = 0; } } __exit: rtgui_theme_draw_scrollbar(bar); if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) == (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) { if (bar->on_scroll != RT_NULL) bar->on_scroll(widget, RT_NULL); } } rt_bool_t rtgui_scrollbar_event_handler(struct rtgui_widget * widget, struct rtgui_event * event) { struct rtgui_scrollbar* bar = (struct rtgui_scrollbar*)widget; switch (event->type) { case RTGUI_EVENT_PAINT: #ifndef RTGUI_USING_SMALL_SIZE if (widget->on_draw != RT_NULL) widget->on_draw(widget, event); else #endif { rtgui_theme_draw_scrollbar(bar); } break; case RTGUI_EVENT_MOUSE_BUTTON: if (RTGUI_WIDGET_IS_ENABLE(widget)) { #ifndef RTGUI_USING_SMALL_SIZE if (widget->on_mouseclick != RT_NULL) { widget->on_mouseclick(widget, event); } else #endif { _rtgui_scrollbar_on_mouseclick(widget, event); } } break; default: break; } return RT_FALSE; } struct rtgui_scrollbar* rtgui_scrollbar_create(int orient, rtgui_rect_t* r) { struct rtgui_scrollbar* bar; bar = (struct rtgui_scrollbar*) rtgui_widget_create (RTGUI_SCROLLBAR_TYPE); if (bar != RT_NULL) { if (r != RT_NULL) { rtgui_widget_set_rect(RTGUI_WIDGET(bar), r); if (orient == RTGUI_VERTICAL) bar->thumb_size = (r->x2 - r->x1); else bar->thumb_size = (r->y2 - r->y1); } bar->orient = orient; } return bar; } void rtgui_scrollbar_destroy(struct rtgui_scrollbar* bar) { rtgui_widget_destroy(RTGUI_WIDGET(bar)); } void rtgui_scrollbar_set_orientation(rtgui_scrollbar_t* bar, int orientation) { RT_ASSERT(bar != RT_NULL); bar->orient = orientation; #ifndef RTGUI_USING_SMALL_SIZE if (bar->orient == RTGUI_HORIZONTAL) { /* horizontal */ rtgui_widget_set_miniwidth(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_WIDTH); rtgui_widget_set_miniheight(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_HEIGHT); } else { /* vertical */ rtgui_widget_set_miniwidth(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_HEIGHT); rtgui_widget_set_miniheight(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_WIDTH); } #endif } void rtgui_scrollbar_set_range(struct rtgui_scrollbar* bar, int min, int max) { RT_ASSERT(bar != RT_NULL); if (min >= max ) { RTGUI_WIDGET_DISABLE(RTGUI_WIDGET(bar)); return; } bar->min_position = (rt_int16_t)min; bar->max_position = (rt_int16_t)max; } void rtgui_scrollbar_set_page_step(struct rtgui_scrollbar* bar, int step) { RT_ASSERT(bar != RT_NULL); bar->page_step = step; /* disable or enable scrollbar */ if (bar->page_step > (bar->max_position - bar->min_position)) { /* disable bar */ RTGUI_WIDGET_DISABLE(RTGUI_WIDGET(bar)); } else { /* enable bar */ RTGUI_WIDGET_ENABLE(RTGUI_WIDGET(bar)); } } void rtgui_scrollbar_set_line_step(struct rtgui_scrollbar* bar, int step) { RT_ASSERT(bar != RT_NULL); bar->line_step = step; } rt_int16_t rtgui_scrollbar_get_value(struct rtgui_scrollbar* bar) { RT_ASSERT(bar != RT_NULL); return bar->thumb_position; } void rtgui_scrollbar_set_value(struct rtgui_scrollbar* bar, rt_int16_t position) { RT_ASSERT(bar != RT_NULL); bar->thumb_position = position; rtgui_widget_update(RTGUI_WIDGET(bar)); } void rtgui_scrollbar_set_onscroll(struct rtgui_scrollbar* bar, rtgui_event_handler_ptr handler) { if (bar == RT_NULL || handler == RT_NULL) return; bar->on_scroll = handler; }