Window.h

// Copyright 2022 ShenMian
// License(Apache-2.0)
 
#pragma once
 
#include "Widget.h"
 
namespace ui
{
 
class Window : public Widget
{
public:
    enum Flag
    {
        None        = 0,
        NoTitleBar  = 1 << 0, // 禁用标题栏
        NoResize    = 1 << 1, // 禁止用户通过拖拽右下角调整大小
        NoMove      = 1 << 2, // 禁止用户移动窗口
        NoScrollbar = 1 << 3, // 禁用滚动条 (窗口依然可以通过鼠标或编程的方式滚动)
        NoScrollWithMouse = 1 << 4, // 禁止用户使用鼠标滚轮垂直滚动. On child window, mouse wheel will be forwarded to
                                    // the parent unless NoScrollbar is also set.
        NoCollapse =
            1 << 5, // 禁止用户通过双击折叠窗口. Also referred to as Window Menu Button (e.g. within a docking node).
        AlwaysAutoResize = 1 << 6, // Resize every window to its content every frame
        NoBackground = 1 << 7, // 禁用背景色(WindowBg, 等.)和外边框的绘制. 类似使用 SetNextWindowBgAlpha(0.0f).
        NoSavedSettings = 1 << 8,  // 不从 .ini 文件中导入/导出配置
        NoMouseInputs   = 1 << 9,  // Disable catching mouse, hovering test with pass through.
        MenuBar         = 1 << 10, // Has a menu-bar
        HorizontalScrollbar =
            1 << 11, // 允许水平滚动条显示(默认关). You may use SetNextWindowContentSize(ImVec2(width,0.0f)); prior to
                     // calling Begin() to specify width. Read code in imgui_demo in the "Horizontal Scrolling" section.
        NoFocusOnAppearing    = 1 << 12, // Disable taking focus when transitioning from hidden to visible state
        NoBringToFrontOnFocus = 1 << 13, // Disable bringing window to front when taking focus (e.g. clicking on it or
                                         // programmatically giving it focus)
        AlwaysVerticalScrollbar   = 1 << 14, // 总是显示垂直滚动条 (即使 ContentSize.y < Size.y)
        AlwaysHorizontalScrollbar = 1 << 15, // 总是显示水平滚动条 (即使 ContentSize.x < Size.x)
        AlwaysUseWindowPadding    = 1 << 16, // Ensure child windows without border uses style.WindowPadding (ignored by
                                             // default for non-bordered child windows, because more convenient)
        NoNavInputs = 1 << 18,               // No gamepad/keyboard navigation within the window
        NoNavFocus =
            1 << 19, // No focusing toward this window with gamepad/keyboard navigation (e.g. skipped by CTRL+TAB)
        UnsavedDocument =
            1 << 20, // 在标题旁显示一个点. When used in a tab/docking context, tab is selected when clicking the X +
                     // closure is not assumed (will wait for user to stop submitting the tab). Otherwise closure is
                     // assumed when pressing the X, so if you keep submitting the tab may reappear at end of tab bar.
        NoDocking = 1 << 21, // 禁用该窗口的停靠
 
        NoNav        = NoNavInputs | NoNavFocus,
        NoDecoration = NoTitleBar | NoResize | NoScrollbar | NoCollapse,
        NoInputs     = NoMouseInputs | NoNavInputs | NoNavFocus,
    };
 
    Window(const std::string& label, Flag flags = Flag::None);
 
    void add(Widget& widget);
 
    void clear();
 
    void update() override;
 
    std::function<void(Window&)> hover;
 
private:
    Flag                 flags_;
    std::vector<Widget*> widgets_;
};
 
} // namespace ui