RT-Thread touch.c及progressbar 3个问题反馈及本人解决办法,希望在后续版本里解决

发布于 2010-12-18 08:39:49 浏览：4357 订阅该版

我用自己的板测试了 V0.3.1 的DEMO程序,发现touch拖拽功能对按键会有兼容性问题,  
问题是:
当按下按键以后(此时按键会被触发按下即btn->flag |= RTGUI_BUTTON_FLAG_PRESS)如果 
手不离开触摸屏移动到按键显示范围之外放开. 此时标志位RTGUI_BUTTON_FLAG_PRESS是不会清除的,因为坐标已经不在该按键的坐标范围内了. 显示的状态就一直保持为按下状态.

后来经过昨天的测试,发现listbox也有此类问题.只能单选的list居然能被多选. 或许radiobox也有这样的问题.

我在程序里屏蔽了拖拽里的//rtgui_touch_calculate();解决了该问题. 
但是拖拽的功能就失效了.

还有关于touch触发问题.  还有一个BUG 就是touch采样时间不是很快时比如1/8秒,而你用手快速触摸屏幕的时候你会发现一个现象. 
只要之前有过触发动作,不管是做什么比如我现在执行了[button]next. 动作发生后, 如果快速触摸屏幕任何位置都能重复触发该动作.

本人提供一个解决办法:

```   if (GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12) != 0) 
    { 
        EXTI_Enable(1);

if(flag == 1)    //******增加触发标志位判断.当有down事件时才执行up事件. 
            { 
                emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON; 
                emouse.button = (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_UP); 
         
                /* use old value */ 
                emouse.x = touch->x; 
                emouse.y = touch->y; 
         
                /* stop timer */ 
                rt_timer_stop(touch->poll_timer); 
                rt_kprintf("touch up: (%d, %d)
", emouse.x, emouse.y); 
                flag = 0; 
            } 
        if ((touch->calibrating == RT_TRUE) && (touch->calibration_func != RT_NULL)) 
        { 
            /* callback function */ 
            touch->calibration_func(emouse.x, emouse.y); 
        } 
    }```

progressbar的问题. 垂直显示有算法错误,造成显示错误BUG. 一下//*****处为本人解决方法

```void rtgui_theme_draw_progressbar(struct rtgui_progressbar* bar) 
{ 
    /* draw progress bar */ 
    struct rtgui_dc* dc; 
    struct rtgui_rect rect; 
    int max = bar->range; 
    int pos = bar->position; 
    int left; 
    rtgui_color_t bc;      //背景颜色

/* begin drawing */ 
    dc = rtgui_dc_begin_drawing(&(bar->parent)); 
    if (dc == RT_NULL) return;

bc = RTGUI_DC_BC(dc); 
    rtgui_widget_get_rect(&(bar->parent), &rect);

/* fill button rect with background color */ 
    bar->parent.gc.background = RTGUI_RGB(212, 208, 200);

/* draw border */ 
    rect.x2 --; rect.y2 --; 
    rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SUNKEN);

/* Nothing to draw */ 
    if (max == 0) 
    { 
        rtgui_dc_end_drawing(dc); 
        return; 
    }

rect.x2 ++; rect.y2 ++; 
    left = max - pos; 
    rtgui_rect_inflate(&rect, -2); 
    bar->parent.gc.background = RTGUI_RGB(0, 0, 255);

if (bar->orient == RTGUI_VERTICAL) 
    { 
        /* Vertical bar grows from bottom to top */ 
        int dy = (rtgui_rect_height(rect) * left) / max; 
        rect.y1 += dy; 
        rtgui_dc_fill_rect(dc, &rect);

RTGUI_DC_BC(dc) = bc; 
        rect.y1 -= dy; rect.y2 = dy+rect.y1; //************修正原版垂直显示错误 
    //  rect.y1 -= dy; rect.y2 = dy; 
        rtgui_dc_fill_rect(dc, &rect); 
    } 
    else 
    { 
        /* Horizontal bar grows from left to right */ 
        int dx = (rtgui_rect_width(rect) * left) / max; 
        rect.x2 -= dx; 
        rtgui_dc_fill_rect(dc, &rect);

RTGUI_DC_BC(dc) = bc; 
        rect.x1 = rect.x2; rect.x2 += dx; 
        rtgui_dc_fill_rect(dc, &rect); 
    }

/* end drawing */ 
    rtgui_dc_end_drawing(dc); 
    return; 
}```