#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
PANDA3D GUI功能测试示例
展示DirectGUI系统的各种组件使用方法
"""

import sys
from direct.showbase.ShowBase import ShowBase
from direct.gui.DirectGui import *
from direct.gui.OnscreenText import OnscreenText
from direct.gui.OnscreenImage import OnscreenImage
from panda3d.core import *

class GUITestApp(ShowBase):
    def __init__(self):
        ShowBase.__init__(self)
        
        # 设置窗口标题
        wp = WindowProperties()
        wp.setTitle("PANDA3D GUI功能测试")
        self.win.requestProperties(wp)
        
        # 设置背景颜色
        self.setBackgroundColor(0.2, 0.3, 0.5)
        
        # 尝试加载中文字体
        self.chinese_font = self.loadChineseFont()
        
        # 创建标题文本
        self.title = OnscreenText(
            text="PANDA3D DirectGUI 组件示例",
            pos=(0, 0.9),
            scale=0.08,
            fg=(1, 1, 1, 1),
            align=TextNode.ACenter,
            font=self.chinese_font if self.chinese_font else None
        )
        
        # 创建各种GUI组件
        self.createButtons()
        self.createLabels()
        self.createEntries()
        self.createSliders()
        self.createCheckboxes()
        self.createRadioButtons()
        self.createScrolledFrame()
        self.createOptionMenu()
        
        # 状态显示文本
        self.statusText = OnscreenText(
            text="状态: 准备就绪",
            pos=(-1.2, -0.9),
            scale=0.05,
            fg=(0, 1, 0, 1),
            align=TextNode.ALeft
        )
        
        print("GUI测试应用启动成功!")
        print(f"中文字体加载状态: {'成功' if self.chinese_font else '失败，使用默认字体'}")
        print("尝试点击各种GUI组件来测试功能")
    
    def loadChineseFont(self):
        """尝试加载中文字体"""
        import os
        font_paths = [
            '/usr/share/fonts/truetype/wqy/wqy-microhei.ttc',
            '/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc',
            '/usr/share/fonts/truetype/arphic/ukai.ttc',
            '/usr/share/fonts/truetype/arphic/uming.ttc',
        ]
        
        for font_path in font_paths:
            if os.path.exists(font_path):
                try:
                    font = self.loader.loadFont(font_path)
                    if font:
                        return font
                except:
                    continue
        return None
    
    def createButtons(self):
        """创建按钮组件"""
        # 普通按钮
        self.button1 = DirectButton(
            text="普通按钮",
            pos=(-0.8, 0, 0.6),
            scale=0.06,
            command=self.onButton1Click,
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
        
        # 带图像的按钮
        self.button2 = DirectButton(
            text="彩色按钮",
            pos=(-0.4, 0, 0.6),
            scale=0.06,
            command=self.onButton2Click,
            frameColor=(0.2, 0.8, 0.2, 1),
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
        
        # 退出按钮
        self.exitButton = DirectButton(
            text="退出程序",
            pos=(0.8, 0, 0.6),
            scale=0.06,
            command=self.exitApp,
            frameColor=(0.8, 0.2, 0.2, 1),
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
    
    def createLabels(self):
        """创建标签组件"""
        self.label1 = DirectLabel(
            text="这是一个标签",
            pos=(-0.8, 0, 0.4),
            scale=0.05,
            frameColor=(0, 0, 0, 0),  # 透明背景
            text_fg=(1, 1, 0, 1),
            text_font=self.chinese_font if self.chinese_font else None
        )
        
        self.label2 = DirectLabel(
            text="带背景的标签",
            pos=(-0.4, 0, 0.4),
            scale=0.05,
            frameColor=(0.3, 0.3, 0.7, 0.8),
            text_fg=(1, 1, 1, 1),
            text_font=self.chinese_font if self.chinese_font else None
        )
    
    def createEntries(self):
        """创建文本输入框"""
        # 普通输入框
        self.entry1 = DirectEntry(
            text="",
            pos=(-0.8, 0, 0.2),
            scale=0.05,
            command=self.onEntry1Submit,
            initialText="在这里输入文本...",
            numLines=1,
            focus=0,
            width=12
        )
        
        # 密码输入框
        self.entry2 = DirectEntry(
            text="",
            pos=(-0.4, 0, 0.2),
            scale=0.05,
            command=self.onEntry2Submit,
            initialText="密码输入框",
            numLines=1,
            focus=0,
            width=12,
            obscured=1  # 密码模式
        )
    
    def createSliders(self):
        """创建滑块组件"""
        # 水平滑块
        self.slider1 = DirectSlider(
            range=(0, 100),
            value=50,
            pos=(0.2, 0, 0.4),
            scale=0.4,
            command=self.onSlider1Change,
            orientation=DGG.HORIZONTAL
        )
        
        # 垂直滑块
        self.slider2 = DirectSlider(
            range=(0, 100),
            value=25,
            pos=(0.6, 0, 0.2),
            scale=0.3,
            command=self.onSlider2Change,
            orientation=DGG.VERTICAL
        )
        
        # 滑块值显示
        self.sliderValueText = OnscreenText(
            text="滑块值: H=50, V=25",
            pos=(0.4, 0.1),
            scale=0.04,
            fg=(1, 1, 1, 1),
            font=self.chinese_font if self.chinese_font else None
        )
    
    def createCheckboxes(self):
        """创建复选框"""
        self.checkbox1 = DirectCheckButton(
            text="选项 1",
            pos=(-0.8, 0, 0),
            scale=0.05,
            command=self.onCheckbox1Toggle,
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
        
        self.checkbox2 = DirectCheckButton(
            text="选项 2",
            pos=(-0.4, 0, 0),
            scale=0.05,
            command=self.onCheckbox2Toggle,
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
    
    def createRadioButtons(self):
        """创建单选按钮组"""
        self.radioButtons = []
        self.radioVar = [0]  # 用列表来存储选中的索引
        
        for i in range(3):
            radio = DirectRadioButton(
                text=f"单选 {i+1}",
                pos=(-0.8 + i*0.2, 0, -0.2),
                scale=0.05,
                variable=self.radioVar,
                value=[i],
                command=self.onRadioButtonSelect,
                extraArgs=[i],  # 添加额外参数
                rolloverSound=None,
                clickSound=None,
                text_font=self.chinese_font if self.chinese_font else None
            )
            self.radioButtons.append(radio)
    
    def createScrolledFrame(self):
        """创建滚动框架"""
        # 创建滚动框架
        self.scrollFrame = DirectScrolledFrame(
            frameSize=(-0.5, 0.5, -0.3, 0.3),
            canvasSize=(-0.5, 0.5, -1, 1),
            pos=(0.2, 0, -0.2),
            frameColor=(0.2, 0.2, 0.2, 0.8),
            scrollBarWidth=0.04,
            verticalScroll_relief=DGG.SUNKEN,
            horizontalScroll_relief=DGG.SUNKEN
        )
        
        # 在滚动框架中添加内容
        for i in range(10):
            label = DirectLabel(
                text=f"滚动项目 {i+1}",
                pos=(0, 0, 0.8 - i*0.15),
                scale=0.04,
                parent=self.scrollFrame.getCanvas(),
                frameColor=(0, 0, 0, 0),
                text_fg=(1, 1, 1, 1),
                text_font=self.chinese_font if self.chinese_font else None
            )
    
    def createOptionMenu(self):
        """创建选项菜单"""
        items = ["选项A", "选项B", "选项C", "选项D"]
        self.optionMenu = DirectOptionMenu(
            text="选择选项",
            pos=(0.6, 0, 0),
            scale=0.05,
            items=items,
            initialitem=0,
            command=self.onOptionMenuSelect,
            rolloverSound=None,
            clickSound=None,
            text_font=self.chinese_font if self.chinese_font else None
        )
    
    # 事件处理函数
    def onButton1Click(self):
        """按钮1点击事件"""
        self.updateStatus("普通按钮被点击!")
        print("普通按钮被点击")
    
    def onButton2Click(self):
        """按钮2点击事件"""
        self.updateStatus("彩色按钮被点击!")
        print("彩色按钮被点击")
    
    def onEntry1Submit(self, text):
        """文本输入框提交事件"""
        self.updateStatus(f"输入的文本: {text}")
        print(f"输入的文本: {text}")
    
    def onEntry2Submit(self, text):
        """密码输入框提交事件"""
        self.updateStatus(f"输入的密码长度: {len(text)}")
        print(f"输入的密码: {text}")
    
    def onSlider1Change(self):
        """水平滑块变化事件"""
        value = self.slider1['value']
        self.updateSliderValues()
        print(f"水平滑块值: {value}")
    
    def onSlider2Change(self):
        """垂直滑块变化事件"""
        value = self.slider2['value']
        self.updateSliderValues()
        print(f"垂直滑块值: {value}")
    
    def updateSliderValues(self):
        """更新滑块值显示"""
        h_val = int(self.slider1['value'])
        v_val = int(self.slider2['value'])
        self.sliderValueText.setText(f"滑块值: H={h_val}, V={v_val}")
    
    def onCheckbox1Toggle(self, status):
        """复选框1切换事件"""
        state = "选中" if status else "未选中"
        self.updateStatus(f"复选框1: {state}")
        print(f"复选框1: {state}")
    
    def onCheckbox2Toggle(self, status):
        """复选框2切换事件"""
        state = "选中" if status else "未选中"
        self.updateStatus(f"复选框2: {state}")
        print(f"复选框2: {state}")
    
    def onRadioButtonSelect(self, index, status):
        """单选按钮选择事件"""
        if status:
            self.updateStatus(f"选中单选按钮: {index + 1}")
            print(f"选中单选按钮: {index + 1}")
    
    def onOptionMenuSelect(self, arg):
        """选项菜单选择事件"""
        self.updateStatus(f"选择了: {arg}")
        print(f"选择了选项: {arg}")
    
    def updateStatus(self, message):
        """更新状态显示"""
        self.statusText.setText(f"状态: {message}")
    
    def exitApp(self):
        """退出应用程序"""
        print("正在退出程序...")
        self.userExit()

if __name__ == "__main__":
    try:
        app = GUITestApp()
        app.run()
    except Exception as e:
        print(f"程序运行出错: {e}")
        sys.exit(1)