Window （窗口）(lv_win)

Overview（概述）

显示原文

The Window is container-like object built from a header with title and buttons and a content area.

Window（窗口）是一个类似容器的对象，由带有标头、按钮和内容区域构建而成。

Parts and Styles（部分和样式）

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The Window is built from other widgets so you can check their documentation for details:

Background: lv_obj.h
Header on the background: lv_obj.h
Title on the header: lv_label.h
Buttons on the header: lv_button.h
Content area on the background: lv_obj.h

窗口控件是由其他控件构建的，因此可以查看它们的文档以获取详细信息：

背景：lv_obj.h
背景标头：lv_obj.h
标头上的标题：lv_label.h
标头上的按钮： lv_button.h
背景内容区：lv_obj.h

Usage（用法）

Create a Window（创建一个窗口）

显示原文

lv_win_create(parent) creates a Window with an empty header.

lv_win_create(parent) 创建一个标头为空的窗口。

Title and buttons（标头和按钮）

显示原文

Any number of texts (but typically only one) can be added to the header with lv_win_add_title(win, "The title").

Control buttons can be added to the window's header with lv_win_add_button(win, icon, button_width). icon can be any image source, and button_width is the width of the button.

The title and the buttons will be added in the order the functions are called. So adding a button, a text and two other buttons will result in a button on the left, a title, and 2 buttons on the right. The width of the title is set to take all the remaining space on the header. In other words: it pushes to the right all the buttons that are added after the title.

可以使用 lv_win_add_title(win, "The title") 将任意数量的文本（但通常只有一个）添加到标头中。

可以使用 lv_win_add_button(win, icon, button_width) 将控制按钮添加到窗口的标头。 icon 可以是任何图像源， button_width 是按钮的宽度。

标头和按钮将按照调用函数的顺序添加。因此，添加一个按钮、一个文本和另外两个按钮将在左侧产生一个按钮，在右侧产生一个标头和两个按钮。标头的宽度设置为占据标头上的所有剩余空间。换句话说：它将标头后添加的所有按钮推到右侧。

Get the parts（获取部分）

显示原文

lv_win_get_header(win) returns a pointer to the header, lv_win_get_content(win) returns a pointer to the content container to which the content of the window can be added.

lv_win_get_header(win) 返回一个指向标头的指针， lv_win_get_content(win) 返回一个指向可以在窗口添加内容的容器指针。

Events（事件）

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No special events are sent by the windows, however events can be added manually to the return value of lv_win_add_button().

Learn more about Events（事件）.

窗口不会发送特殊事件，但是可以手动将事件添加到 lv_win_add_button() 的返回值中。

了解有关 Events（事件）的更多信息。

Keys（按键）

显示原文

No Keys are handled by the window.

Learn more about Keys（按键）.

窗口不处理任何按键。

了解有关 Keys（按键）的更多信息。

Example

[English]

Simple window

#include "../../lv_examples.h"
#if LV_USE_WIN && LV_BUILD_EXAMPLES

static void event_handler(lv_event_t * e)
{
    lv_obj_t * obj = lv_event_get_target(e);
    LV_UNUSED(obj);
    LV_LOG_USER("Button %d clicked", (int)lv_obj_get_index(obj));
}

void lv_example_win_1(void)
{
    lv_obj_t * win = lv_win_create(lv_screen_active());
    lv_obj_t * btn;
    btn = lv_win_add_button(win, LV_SYMBOL_LEFT, 40);
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);

    lv_win_add_title(win, "A title");

    btn = lv_win_add_button(win, LV_SYMBOL_RIGHT, 40);
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);

    btn = lv_win_add_button(win, LV_SYMBOL_CLOSE, 60);
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);

    lv_obj_t * cont = lv_win_get_content(win);  /*Content can be added here*/
    lv_obj_t * label = lv_label_create(cont);
    lv_label_set_text(label, "This is\n"
                      "a pretty\n"
                      "long text\n"
                      "to see how\n"
                      "the window\n"
                      "becomes\n"
                      "scrollable.\n"
                      "\n"
                      "\n"
                      "Some more\n"
                      "text to be\n"
                      "sure it\n"
                      "overflows. :)");

}

#endif

API

lv_win.h

lv_types.h