index.md

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Presenter

报告模板

Mufanc

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代码框

<style scoped> p { margin-top: 0; } </style>

• 代码段

float Q_rsqrt( float number ) 
{
    long i;
    float x2, y;
    const float threeHalfs = 1.5f;

    x2 = number * 0.5f;
    y  = number;
    i  = * ( long * ) &y;                       // evil floating point bit level hacking
    i  = 0x5f3759df - ( i >> 1 );               // What the fuck? 
    y  = * ( float * ) &i;
    y  = y * ( threeHalfs - ( x2 * y * y ) );   // 1st iteration
//  y  = y * ( threeHalfs - ( x2 * y * y ) );   // 2nd iteration, this can be removed

    return y;
}

• 行内代码

SQL 查询： SELECT `username` FROM users;

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<x-clicks> 组件

• 允许在组件内感知页面 clicks 变化

<x-clicks :k='5'>
    <some-component />
</x-clicks>

• 后面也还可以再接其它 v-click

• 就像这样

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<style scoped> .at-click { display: inline; } </style>

<at-click> 组件

• 感知页面 clicks 变化，并显示隐藏一些内容

<at-click k="=3">仅当 clicks 为 3 时显示</at-click>
<at-click k="!3">仅当 clicks 不为 3 时显示</at-click>
<at-click k="3">当 clicks >= 3 时显示</at-click>
<at-click k=">=3" gone>同上，且隐藏时不占用布局空间</at-click>
<at-click k="<3">当 clicks < 3 时显示</at-click>

• ➡️ 仅当 clicks 为 3 时显示 ⬅️

• ➡️ 仅当 clicks 不为 3 时显示 ⬅️

• ➡️ 当 clicks >= 3 时显示 ⬅️

• ➡️ 同上，且隐藏时不占用文档空间 ⬅️

• ➡️ 当 clicks < 3 时显示 ⬅️

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<flexi-code> 组件

• 变化的代码框，可以用来实现一些漂亮的动画

class Scheduler(object):

    def __init__(self, timer_id: int):
        self._timer = Timer(timer_id)
        self._pending_tasks = PriorityQueue()
        self._running_tasks = []
        self._lock = ThreadSafeFlag()
        asyncio.create_task(self._loop())

    async def _loop(self):
        while True:  
            await self._lock.wait()
            self._lock.clear()
            self._running_tasks.pop(0)()

    def _refresh(self):
        current_time = ticks_ms()
        delay = self._pending_tasks.peek()[0] - current_time
        self._timer.init(
            mode=Timer.ONE_SHOT, 
            period=delay, 
            callback=self._callback
        )

    def _callback(self, *_):
        _, callback, in_irq = self._pending_tasks.pop()

        if in_irq:
            callback()
        else:
            self._running_tasks.append(callback)
            self._lock.set()

        if len(self._pending_tasks) != 0:
            self._refresh()

    def call_later(self, callback, delay_ms, in_irq=False):
        current_time = ticks_ms()
        
        self._pending_tasks.add((
            ticks_add(current_time, delay_ms), 
            callback, 
            in_irq
        ))
        
        self._refresh()