TextLayer_Cursor_GetPixelPos( LCUI_TextLayer *layer )
/* 获取文本图层的光标相对于容器位置，单位为像素 */
{
LCUI_Pos pos;
pos = TextLayer_Cursor_GetFixedPixelPos( layer );
/* 加上偏移坐标 */
pos = Pos_Add( pos, layer->offset_pos );
return pos;
}
TextBox_ViewArea_Update( LCUI_Widget *widget )
/* 更新文本框的文本显示区域 */
{
static int cursor_h;
static ScrollBar_Data scrollbar_data;
static LCUI_Pos cursor_pos, area_pos;
static LCUI_Size layer_size, area_size;
static LCUI_Widget *scrollbar[2];
static LCUI_TextLayer *layer;
//_DEBUG_MSG("enter\n");
/* 获取显示区域的尺寸 */
area_size = Widget_GetContainerSize( widget );
/* 获取滚动条 */
scrollbar[0] = TextBox_GetScrollbar( widget, 0 );
scrollbar[1] = TextBox_GetScrollbar( widget, 1 );
/* 如果滚动条可见，那么区域尺寸就需要减去滚动条占用的尺寸 */
if( scrollbar[0]->visible ) {
area_size.w -= Widget_GetWidth( scrollbar[0] );
}
if( scrollbar[1]->visible ) {
area_size.h -= Widget_GetHeight( scrollbar[1] );
}
if( area_size.h <= 0 || area_size.w <= 0 ) {
return -1;
}
layer = TextBox_GetTextLayer( widget );
layer_size = TextLayer_GetSize( layer );
if( layer_size.h <= 0 || layer_size.w <= 0 ) {
return -2;
}
/* 获取显示区域的位置 */
area_pos = TextBox_ViewArea_GetPos( widget );
/* 获取光标的坐标 */
cursor_pos = TextLayer_Cursor_GetFixedPixelPos( layer );
/* 获取当前行的最大高度作为光标的高度 */
cursor_h = TextLayer_CurRow_GetMaxHeight( layer );
/* 设定滚动条的数据中的最大值 */
ScrollBar_SetMaxNum( scrollbar[0], layer_size.h - area_size.h );
//_DEBUG_MSG("cursor_pos: %d,%d\n", cursor_pos.x, cursor_pos.y);
//_DEBUG_MSG("area_rect: %d,%d,%d,%d\n",
// area_pos.x, area_pos.y,area_size.w, area_size.h );
//_DEBUG_MSG("layer_size: %d,%d\n", layer_size.w, layer_size.h);
/* 检测光标Y轴坐标是否超出显示区域的范围 */
if( cursor_pos.y < area_pos.y ) {
area_pos.y = cursor_pos.y;
}
if(cursor_pos.y + cursor_h > area_pos.y + area_size.h ) {
area_pos.y = cursor_pos.y + cursor_h - area_size.h;
}
/* 如果显示区域在Y轴上超过文本图层的范围 */
if( area_pos.y + area_size.h > layer_size.h ) {
area_pos.y = layer_size.h - area_size.h;
}
if( area_pos.y < 0 ) {
area_pos.y = 0;
}
/* 设定滚动条的数据中的当前值 */
ScrollBar_SetCurrentValue( scrollbar[0], area_pos.y );
/* 获取滚动条的数据，供滚动文本层利用 */
scrollbar_data = ScrollBar_GetData( scrollbar[0] );
//_DEBUG_MSG("scrollbar_data: size: %d / %d, num: %d / %d\n",
//scrollbar_data.current_size, scrollbar_data.max_size,
//scrollbar_data.current_num, scrollbar_data.max_num);
/* 根据数据，滚动文本图层至响应的位置，也就是移动文本显示区域 */
TextBox_TextLayer_VertScroll( scrollbar_data, widget );
/* 设定滚动条的数据中的最大值 */
ScrollBar_SetMaxNum( scrollbar[1], layer_size.w - area_size.w );
if( cursor_pos.x < area_pos.x ) {
area_pos.x = cursor_pos.x;
}
if(cursor_pos.x +5 > area_pos.x + area_size.w ) {
area_pos.x = cursor_pos.x+5 - area_size.w;
}
if( area_pos.x + area_size.w > layer_size.w ) {
area_pos.x = layer_size.w - area_size.w;
}
if( area_pos.x < 0 ) {
area_pos.x = 0;
}
/* 设定滚动条的数据中的当前值 */
ScrollBar_SetCurrentValue( scrollbar[1], area_pos.x );
/* 获取滚动条的数据，供滚动文本层利用 */
scrollbar_data = ScrollBar_GetData( scrollbar[1] );
//_DEBUG_MSG("scrollbar_data: size: %d / %d, num: %d / %d\n",
//scrollbar_data.current_size, scrollbar_data.max_size,
//scrollbar_data.current_num, scrollbar_data.max_num);
TextBox_HoriScroll_TextLayer( scrollbar_data, widget );
//_DEBUG_MSG("quit\n");
return 0;
}