如何在PySimpleGUI网格中定位已选中的矩形？

首先，你需要先把所有网格矩形的ID存起来，方便后续遍历检查。下面是完整的示例代码，整合了5×5网格、拖拽选中高亮，以及点击按钮获取选中项的功能：

import PySimpleGUI as sg

# 定义颜色常量
HIGHLIGHT_COLOR = '#90EE90'  # 淡绿色高亮
DEFAULT_COLOR = 'white'      # 默认填充色
GRID_SIZE = 5                # 网格大小
CELL_SIZE = 50               # 每个单元格尺寸

# 创建布局
layout = [
    [sg.Graph((GRID_SIZE*CELL_SIZE, GRID_SIZE*CELL_SIZE), (0, 0), (GRID_SIZE*CELL_SIZE, GRID_SIZE*CELL_SIZE), key='-GRAPH-')],
    [sg.Button('获取选中矩形', key='-GET_SELECTED-'), sg.Text('', key='-RESULT-')]
]

window = sg.Window('网格选中示例', layout, finalize=True)
graph = window['-GRAPH-']

# 存储所有矩形的ID，二维列表对应网格位置
rect_ids = []
for i in range(GRID_SIZE):
    row_ids = []
    for j in range(GRID_SIZE):
        x1 = j * CELL_SIZE
        y1 = i * CELL_SIZE
        x2 = x1 + CELL_SIZE
        y2 = y1 + CELL_SIZE
        # 绘制矩形并保存ID
        rect_id = graph.draw_rectangle((x1, y1), (x2, y2), fill_color=DEFAULT_COLOR, line_color='black')
        row_ids.append(rect_id)
    rect_ids.append(row_ids)

# 拖拽选中相关变量
dragging = False
selected_start = None

while True:
    event, values = window.read()
    if event == sg.WIN_CLOSED:
        break
    
    # 处理鼠标点击/拖拽选中
    if event == '-GRAPH-':
        x, y = values['-GRAPH-']
        # 计算点击的单元格坐标
        cell_x = int(x // CELL_SIZE)
        cell_y = int(y // CELL_SIZE)
        # 确保坐标在网格范围内
        if 0 <= cell_x < GRID_SIZE and 0 <= cell_y < GRID_SIZE:
            if not dragging:
                # 开始拖拽，记录起始位置
                dragging = True
                selected_start = (cell_y, cell_x)
                # 先高亮当前点击的单元格
                graph.itemconfig(rect_ids[cell_y][cell_x], fill_color=HIGHLIGHT_COLOR)
            else:
                # 拖拽过程中，计算选中的矩形范围
                start_y, start_x = selected_start
                end_y, end_x = cell_y, cell_x
                # 确定范围的上下左右
                min_y = min(start_y, end_y)
                max_y = max(start_y, end_y)
                min_x = min(start_x, end_x)
                max_x = max(start_x, end_x)
                # 先重置所有单元格颜色
                for i in range(GRID_SIZE):
                    for j in range(GRID_SIZE):
                        graph.itemconfig(rect_ids[i][j], fill_color=DEFAULT_COLOR)
                # 高亮选中范围内的单元格
                for i in range(min_y, max_y+1):
                    for j in range(min_x, max_x+1):
                        graph.itemconfig(rect_ids[i][j], fill_color=HIGHLIGHT_COLOR)
        else:
            # 点击到网格外，结束拖拽
            dragging = False
            selected_start = None
    # 鼠标释放时结束拖拽
    elif event == '-GRAPH-+UP':
        dragging = False
    
    # 处理获取选中矩形的按钮点击
    elif event == '-GET_SELECTED-':
        selected_cells = []
        # 遍历所有矩形ID，检查填充色
        for i in range(GRID_SIZE):
            for j in range(GRID_SIZE):
                current_color = graph.itemcget(rect_ids[i][j], 'fill')
                if current_color == HIGHLIGHT_COLOR:
                    # 记录单元格位置（可以换成ID或者其他信息）
                    selected_cells.append(f'({i+1}, {j+1})')  # 转换成1-based索引方便查看
        # 更新结果文本
        if selected_cells:
            window['-RESULT-'].update(f'选中的矩形位置：{"，".join(selected_cells)}')
        else:
            window['-RESULT-'].update('没有选中任何矩形')

window.close()

关键步骤说明： #

• 存储矩形ID：绘制网格时，把每个矩形的ID存入二维列表rect_ids，对应网格的行和列，方便后续精准定位每个单元格。
• 用itemcget检查颜色：点击按钮时，遍历rect_ids，调用graph.itemcget(rect_id, 'fill')获取当前填充色，和高亮色对比，匹配的就是选中的矩形。
• 收集结果：把选中的单元格位置（或ID）收集起来，展示到界面上。

你可以直接运行这段代码测试功能，如果原有代码结构不同，只需把存储ID和检查颜色的逻辑对应到自己的代码里即可。

内容的提问来源于stack exchange，提问作者Neil E