// 初始化日期列表
  initDateList() {
    const dateList = [];
    const weekDays = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
    for (let i = 0; i < 7; i++) {
      const date = new Date();
      // 獲取未來幾天的日期
      date.setDate(date.getDate() + i);
      dateList.push({
        date: date.getTime(),
        month: date.getMonth() + 1,
        day: date.getDate(),
        weekDay: weekDays[date.getDay()]
      });
    }
    this.setData({ dateList });
  },

<view 
      wx:for="{{ dateList }}" 
      wx:key="date"
      class="date-item {{ currentDateIndex === index ? 'active' : '' }}"
      bindtap="onDateSelect"
      data-index="{{ index }}"
    >
      <text class="date-text">{{ item.month }}-{{ item.day }}</text>
      <text class="week-text">{{ item.weekDay }}</text>
      <text class="today-text" wx:if="{{ index === 0 }}">今天</text>
    </view>

   for (let i = 0; i <= 24; i++) {
     ctx.beginPath();
     const y = i * hourHeight;
     ctx.moveTo(0, y);
     ctx.lineTo(width, y);
     ctx.stroke();
   }

const query = wx.createSelectorQuery();
query.select('#timeGridCanvas')
  .boundingClientRect(rect => {
    const x = e.touches[0].clientX - rect.left;
    const y = e.touches[0].clientY - rect.top;

const hourIndex = Math.floor(y / this.data.hourHeight);

const existingBlockIndex = this.data.selectedBlocks.findIndex(block => 
          hourIndex >= block.startHour && hourIndex < block.endHour
        );

if (existingBlockIndex !== -1) {
  // 從當(dāng)前日期的選中塊中移除
  const newSelectedBlocks = [...this.data.selectedBlocks];
  newSelectedBlocks.splice(existingBlockIndex, 1);
  // 從所有選中塊中移除
  const currentDate = `${this.data.dateList[this.data.currentDateIndex].month}-${this.data.dateList[this.data.currentDateIndex].day}`;
  const allBlockIndex = this.data.allSelectedBlocks.findIndex(block => 
    block.date === currentDate && 
    block.startHour === this.data.selectedBlocks[existingBlockIndex].startHour
  );
  const newAllBlocks = [...this.data.allSelectedBlocks];
  if (allBlockIndex !== -1) {
    newAllBlocks.splice(allBlockIndex, 1);
  }
  this.setData({
    selectedBlocks: newSelectedBlocks,
    allSelectedBlocks: newAllBlocks
  });
}

else {
  // 檢查限制
  if (this.data.allSelectedBlocks.length >= 3) {
    wx.showToast({
      title: '最多只能選擇3個時間段',
      icon: 'none'
    });
    return;
  }
  // 添加新時間段
  const startHour = Math.floor(y / this.data.hourHeight);
  const endHour = startHour + 1;
  const newBlock = {
    date: `${this.data.dateList[this.data.currentDateIndex].month}-${this.data.dateList[this.data.currentDateIndex].day}`,
    startHour: startHour,
    endHour: endHour,
    startTime: this.formatTime(startHour * 60),
    endTime: this.formatTime(endHour * 60)
  };
  this.setData({
    selectedBlocks: [...this.data.selectedBlocks, newBlock],
    allSelectedBlocks: [...this.data.allSelectedBlocks, newBlock]
  });
}

date: 當(dāng)前選中的日期
startHour: 開始小時
endHour: 結(jié)束小時
startTime: 格式化后的開始時間
endTime: 格式化后的結(jié)束時間

checkResizeHandle(x, y) {
  const handleSize = 16; // 手柄的點擊范圍大小
  for (let i = 0; i < this.data.selectedBlocks.length; i++) {
    const block = this.data.selectedBlocks[i];
    const startY = block.startHour * this.data.hourHeight;
    const endY = block.endHour * this.data.hourHeight;
    // 檢查是否點擊到上方手柄
    if (y >= startY - handleSize && y <= startY + handleSize) {
      return { blockIndex: i, isStart: true, position: startY };
    }
    // 檢查是否點擊到下方手柄
    if (y >= endY - handleSize && y <= endY + handleSize) {
      return { blockIndex: i, isStart: false, position: endY };
    }
  }
  return null;
}

const resizeHandle = this.checkResizeHandle(x, y);
        if (resizeHandle) {
          // 開始拉伸操作
          this.setData({
            isResizing: true,
            resizingBlockIndex: resizeHandle.blockIndex,
            startY: y,
            initialY: resizeHandle.position,
            isResizingStart: resizeHandle.isStart
          });
          return;
        }

isResizing：標(biāo)記正在拉伸
startY：開始拖動的位置
initialY：手柄的初始位置
isResizingStart：是否在調(diào)整開始時間

// 計算拖動了多遠
const deltaY = currentY - startY;  // 比如拖動了30像素
// 計算15分鐘對應(yīng)的高度
const quarterHeight = hourHeight / 4;  // 假設(shè)hourHeight是60，那么這里是15
// 計算移動了多少個15分鐘
const quarterMoved = Math.floor(Math.abs(deltaY) / quarterHeight) * (deltaY > 0 ? 1 : -1);
// 計算新的時間
const newTime = originalTime + (quarterMoved * 0.25);  // 0.25代表15分鐘

// 確保時間合理，比如不能小于0點，不能超過24點
if (newTime >= 0 && newTime <= 24) {
  // 對齊到15分鐘
  const alignedTime = Math.floor(newTime * 4) / 4;
  // 轉(zhuǎn)換成"HH:MM"格式
  const hours = Math.floor(alignedTime);
  const minutes = Math.round((alignedTime - hours) * 60);
  const timeString = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}`;
}

onCanvasLongPress(e) {
  // 1. 先找到用戶點擊的是哪個時間塊
  const hourIndex = Math.floor(y / this.data.hourHeight);
  const pressedBlockIndex = this.data.selectedBlocks.findIndex(block => 
    hourIndex >= block.startHour && hourIndex < block.endHour
  );
  // 2. 如果真的點到了時間塊
  if (pressedBlockIndex !== -1) {
    // 3. 保存這個時間塊的信息，因為待會要用
    const pressedBlock = {...this.data.selectedBlocks[pressedBlockIndex]};
    // 4. 從原來的位置刪除這個時間塊
    const newBlocks = [...this.data.selectedBlocks];
    newBlocks.splice(pressedBlockIndex, 1);
    // 5. 設(shè)置拖動狀態(tài)
    this.setData({
      isDragging: true,                // 標(biāo)記正在拖動
      dragBlock: pressedBlock,         // 保存被拖動的時間塊
      dragStartY: y,                   // 記錄開始拖動的位置
      selectedBlocks: newBlocks,       // 更新剩下的時間塊
      dragBlockDuration: pressedBlock.endHour - pressedBlock.startHour  // 記錄時間塊長度
    });
  }
}

onCanvasMove(e) {
  if (this.data.isDragging) {
    const y = e.touches[0].clientY - rect.top;
    const deltaY = y - this.data.dragStartY;
    const quarterHeight = this.data.hourHeight / 4;
    const quarterMoved = Math.floor(deltaY / quarterHeight);
    const targetHour = this.data.dragBlock.startHour + (quarterMoved * 0.25);
    const boundedHour = Math.max(0, Math.min(24 - this.data.dragBlockDuration, targetHour));
    const isOccupied = this.checkTimeConflict(boundedHour, boundedHour + this.data.dragBlockDuration);
    this.setData({
      dragShadowHour: boundedHour,     // 投影的位置
      dragShadowWarning: isOccupied    // 是否顯示沖突警告
    });
  }
}

checkTimeConflict(startHour, endHour) {
  return this.data.selectedBlocks.some(block => {
    if (block === this.data.dragBlock) return false;
    return (startHour < block.endHour && endHour > block.startHour);
  });
}

onCanvasEnd(e) {
  if (this.data.isDragging) {
    if (this.data.dragShadowHour !== null && 
        this.data.dragBlock && 
        !this.data.dragShadowWarning) {
      const newHour = Math.floor(this.data.dragShadowHour * 4) / 4;
      const duration = this.data.dragBlockDuration;
      const newBlock = {
        startHour: newHour,
        endHour: newHour + duration,
        startTime: this.formatTime(Math.round(newHour * 60)),
        endTime: this.formatTime(Math.round((newHour + duration) * 60))
      };
      const newSelectedBlocks = [...this.data.selectedBlocks, newBlock];
      this.setData({ selectedBlocks: newSelectedBlocks });
    } else if (this.data.dragShadowWarning) {
      const newSelectedBlocks = [...this.data.selectedBlocks, this.data.dragBlock];
      this.setData({ selectedBlocks: newSelectedBlocks });
      wx.showToast({
        title: '該時間段已被占用',
        icon: 'none'
      });
    }
    this.setData({
      isDragging: false,
      dragBlock: null,
      dragStartY: 0,
      dragCurrentY: 0,
      dragShadowHour: null,
      dragBlockDuration: null,
      dragShadowWarning: false
    });
  }
}

const newBlock = {
  date: `${this.data.dateList[this.data.currentDateIndex].month}-${this.data.dateList[this.data.currentDateIndex].day}`,
  startHour: startHour,
  endHour: endHour,
  startTime: this.formatTime(startHour * 60),
  endTime: this.formatTime(endHour * 60)
};
this.setData({
  allSelectedBlocks: [...this.data.allSelectedBlocks, newBlock]  
});

removeTimeBlock(e) {
  const index = e.currentTarget.dataset.index;
  const removedBlock = this.data.allSelectedBlocks[index];
  // 從總列表中刪除
  const newAllBlocks = [...this.data.allSelectedBlocks];
  newAllBlocks.splice(index, 1);
  const currentDate = `${this.data.dateList[this.data.currentDateIndex].month}-${this.data.dateList[this.data.currentDateIndex].day}`;
  if (removedBlock.date === currentDate) {
    const newSelectedBlocks = this.data.selectedBlocks.filter(block => 
      block.startHour !== removedBlock.startHour || 
      block.endHour !== removedBlock.endHour
    );
    this.setData({ selectedBlocks: newSelectedBlocks });
  }
  this.setData({ allSelectedBlocks: newAllBlocks });
}