int Zoom_PictureBox_View_Area(LCUI_Widget *widget, float scale)
/* 功能：缩放PictureBox部件的图片浏览区域 */
{
LCUI_Graph buff, temp;
LCUI_PictureBox *pic_box;
pic_box = Get_Widget_PrivData(widget);
if(!Graph_Valid(pic_box->image)) {
return -1;
}
Graph_Init(&buff);
Graph_Init(&temp);
/* 有效范围为2%~2000% */
if(scale < 0.02) {
scale = 0.02;
}
if(scale > 20) {
scale = 20;
}
if(pic_box->size_mode != SIZE_MODE_ZOOM
&& pic_box->size_mode != SIZE_MODE_BLOCK_ZOOM) {
pic_box->size_mode = SIZE_MODE_ZOOM; /* 改为缩放模式 */
}
pic_box->scale = scale;
Update_BuffGraph(widget);
Update_ReadBox(widget);
Draw_Widget(widget);
Refresh_Widget(widget);
return 0;
}
static void
Update_Label(LCUI_Widget *widget)
/* 功能：更新label部件 */
{
int mode;
LCUI_Size max;
LCUI_Label *label;
label = Get_Widget_PrivData( widget );
if(!Graph_Valid(&widget->background_image)) {
mode = GRAPH_MIX_FLAG_REPLACE; /* 替换模式 */
} else {
mode = GRAPH_MIX_FLAG_OVERLAY; /* 叠加模式 */
}
/* 先绘制文本位图，在绘制前它会更新位图尺寸 */
TextLayer_Draw( widget, &label->layer, mode );
/* 获取尺寸 */
max = TextLayer_Get_Size( &label->layer );
if( widget->dock == DOCK_TYPE_NONE && label->auto_size
&& Size_Cmp( max, widget->size ) != 0 ) {
/* 如果开启了自动调整大小,并且尺寸有改变 */
Resize_Widget(widget, max );
Refresh_Widget(widget);
}
}
static void Exec_Resize_PictureBox(LCUI_Widget *widget)
/* 功能：改变PictureBox部件的尺寸 */
{
LCUI_PictureBox *pic_box = (LCUI_PictureBox*)
Get_Widget_PrivData(widget);
float scale_x, scale_y;
if( widget->size.w <= 0 || widget->size.h <= 0 ) {
Refresh_Widget(widget);
return;
}
switch(pic_box->size_mode) {
case SIZE_MODE_BLOCK_ZOOM:
/* 重新改变图像浏览区域的尺寸，这个尺寸指的是从源图像中截取出的图像的尺寸 */
Resize_PictureBox_View_Area(
widget,
widget->size.w / pic_box->scale,
widget->size.h / pic_box->scale );
/* 以现在的缩放比例重新生成缩放后的图像 */
Zoom_PictureBox_View_Area(widget, pic_box->scale);
break;
case SIZE_MODE_ZOOM:
if(widget->size.w <= 0 || widget->size.h <= 0) {
break;
}
scale_x = (float)widget->size.w / pic_box->image->width;
scale_y = (float)widget->size.h / pic_box->image->height;
if(scale_x < scale_y) pic_box->scale = scale_x;
else pic_box->scale = scale_y;
//printf("Exec_Resize_PictureBox(): scale: %.4f, x: %.4f, y: %.4f\n", pic_box->scale, scale_x, scale_y);
Zoom_PictureBox_View_Area(widget, pic_box->scale);
//printf("Exec_Resize_PictureBox(): read box: %d,%d,%d,%d\n",
//pic_box->read_box.x, pic_box->read_box.y,
//pic_box->read_box.width, pic_box->read_box.height);
break;
case SIZE_MODE_NORMAL:/* 正常模式 */
case SIZE_MODE_STRETCH:/* 拉伸模式 */
case SIZE_MODE_TILE:/* 平铺模式 */
break;
case SIZE_MODE_CENTER: /* 居中模式 */
Resize_PictureBox_View_Area(widget, widget->size.w, widget->size.h);
break;
default : break;
}
Refresh_Widget(widget);
}
void Resize_PictureBox_View_Area(LCUI_Widget *widget, int width, int height)
/* 功能：设定PictureBox部件的图片显示区域的大小 */
{
LCUI_Pos start, center_pos;
LCUI_PictureBox *pic_box;
pic_box = Get_Widget_PrivData(widget);
if(width <= 0 || height <= 0) {
return;
}
if(!Graph_Valid(pic_box->image)) {
return;
}
/* 将中心点位置转换成坐标 */
center_pos.x = pic_box->read_box.center_x * pic_box->scale * pic_box->image->width;
center_pos.y = pic_box->read_box.center_y * pic_box->scale * pic_box->image->height;
/* 处理区域数据，使之为有效区域 */
start.x = center_pos.x - width/2.0;
start.y = center_pos.y - height/2.0;
if(start.x < 0) start.x = 0;
if(start.y < 0) start.y = 0;
if(start.x + width > pic_box->image->width)
start.x = pic_box->image->width - width;
if(start.y + height > pic_box->image->height)
start.y = pic_box->image->height - height;
if(start.x < 0) {
start.x = 0;
width = pic_box->image->width;
}
if(start.y < 0) {
start.y = 0;
height = pic_box->image->height;
}
pic_box->read_box.x = start.x;
pic_box->read_box.y = start.y;
pic_box->read_box.width = width;
pic_box->read_box.height = height;
/* 更新图片盒子内的图像 */
Draw_Widget(widget);
Refresh_Widget(widget);
}
static void Update_Label(LCUI_Widget *widget)
/* 功能：更新label部件 */
{
int mode;
LCUI_Size max;
LCUI_TextLayer *layer;
layer = Get_Widget_PrivData( widget );
max = TextLayer_Get_Size( layer );
if( widget->auto_size && Size_Cmp( max, widget->size ) != 0 ) {
/* 如果开启了自动调整大小,并且尺寸有改变 */
Resize_Widget(widget, max );
Refresh_Widget(widget);
return;
}
if(!Graph_Valid(&widget->background_image)) {
mode = GRAPH_MIX_FLAG_REPLACE; /* 替换模式 */
} else {
mode = GRAPH_MIX_FLAG_OVERLAY; /* 叠加模式 */
}
layer = Get_Widget_PrivData( widget );
TextLayer_Draw( widget, layer, mode );
}
static void Exec_Update_PictureBox(LCUI_Widget *widget)
/* 功能：更新PictureBox部件 */
{
LCUI_Pos pos;
LCUI_PictureBox *pic_box;
LCUI_Graph graph, *p;
//printf("Exec_Update_PictureBox(): start\n");
pos = Pos(0,0);
Graph_Init(&graph);
pic_box = (LCUI_PictureBox*)Get_Widget_PrivData(widget);
//print_widget_info(widget);
//Print_Graph_Info(&widget->graph);
//Print_Graph_Info(pic_box->image);
//printf("Exec_Update_PictureBox(): 1\n");
if(! Graph_Valid(pic_box->image)) return;
//printf("Exec_Update_PictureBox(): widget size: w: %d, h: %d\n", widget->size.w, widget->size.h);
//printf("Exec_Update_PictureBox(): read box: %d,%d,%d,%d\n",
//pic_box->read_box.x, pic_box->read_box.y,
//pic_box->read_box.width, pic_box->read_box.height);
switch(pic_box->size_mode) {
case SIZE_MODE_BLOCK_ZOOM:
case SIZE_MODE_ZOOM:
/* 裁剪图像 */
if(pic_box->scale == 1.00) p = pic_box->image;
else p = &pic_box->buff_graph;
if(! Graph_Valid(p)) {
//printf("! Graph_Valid(p)\n");
return;
}
pos.x = (widget->size.w - pic_box->read_box.width)/2.0;
pos.y = (widget->size.h - pic_box->read_box.height)/2.0;
/* 引用图像中指定区域的图形 */
Quote_Graph(&graph, p, pic_box->read_box);
break;
case SIZE_MODE_NORMAL:/* 正常模式 */
Quote_Graph(&graph, pic_box->image, pic_box->read_box);
break;
case SIZE_MODE_STRETCH:/* 拉伸模式 */
/* 开始缩放图片 */
Graph_Zoom( pic_box->image, &graph, CUSTOM, widget->size );
break;
case SIZE_MODE_TILE:/* 平铺模式 */
Graph_Tile( pic_box->image, &graph, widget->size.w, widget->size.h);
break;
case SIZE_MODE_CENTER:
/* 判断图像的尺寸是否小于图片盒子的尺寸，并计算坐标位置 */
if(pic_box->image->width < widget->size.w) {
pic_box->read_box.x = 0;
pic_box->read_box.width = pic_box->image->width;
pos.x = (widget->size.w - pic_box->image->width)/2 + 0.5;
}
if(pic_box->image->height < widget->size.h) {
pos.y = (widget->size.h - pic_box->image->height)/2 + 0.5;
pic_box->read_box.y = 0;
pic_box->read_box.height = pic_box->image->height;
}
if(pic_box->read_box.y + pic_box->read_box.height >= pic_box->image->height)
/* 如果读取区域的尺寸大于图片尺寸 */
pic_box->read_box.y = pic_box->image->height - pic_box->read_box.height;
if(pic_box->read_box.x + pic_box->read_box.width >= pic_box->image->width)
pic_box->read_box.x = pic_box->image->width - pic_box->read_box.width;
Quote_Graph(&graph, pic_box->image, pic_box->read_box);
break;
default :
break;
}
// 用于调试
//printf("Exec_Update_PictureBox(): read box: %d,%d,%d,%d; %d/%d, %d/%d\n",
//pic_box->read_box.x, pic_box->read_box.y,
//pic_box->read_box.width, pic_box->read_box.height,
//pic_box->read_box.x + pic_box->read_box.width, pic_box->buff_graph.width,
//pic_box->read_box.y + pic_box->read_box.height, pic_box->buff_graph.height);
if(!Graph_Valid(&widget->background_image)) {
Graph_Replace(&widget->graph, &graph, pos);
} else {
Graph_Mix(&widget->graph, &graph, pos);
}
Graph_Free(&graph);
//printf("scale: %.4f\n", pic_box->scale);
//printf("Exec_Update_PictureBox(): end\n");
Refresh_Widget(widget);
}
