郑君的学习笔记

要比昨天进步一点点

发表于 分类于 本文字数： 1.4k 阅读时长 ≈ 1 分钟

DataGrid: CellTemplate
ListBox/ComboBox/TreeView: ItemTemplate
UserControl: ContentTemplate

listbox

<Window.Resources>
    <DataTemplate x:Key="comTemplate">
        <StackPanel Orientation="Horizontal" Margin="5,0">
            <Border Width="10" Height="10" Background="{Binding Code}"/>
            <TextBlock Text="{Binding Code}" Margin="5,0"/>
        </StackPanel>
    </DataTemplate>
</Window.Resources>
<Grid>
    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
        <ComboBox Name="cob" Width="120" Height="30" ItemTemplate="{StaticResource comTemplate}"/>
        <ListBox Name="lib" Width="120" Height="100" Margin="5,0"  ItemTemplate="{StaticResource comTemplate}"/>
    </StackPanel>
</Grid>


List<Color> ColorList = new List<Color>();
ColorList.Add(new Color() { Code = "#FF8C00" });
ColorList.Add(new Color() { Code = "#FF7F50" });
ColorList.Add(new Color() { Code = "#FF6EB4" });
ColorList.Add(new Color() { Code = "#FF4500" });
ColorList.Add(new Color() { Code = "#FF3030" });
ColorList.Add(new Color() { Code = "#CD5B45" });

cob.ItemsSource = ColorList;
lib.ItemsSource = ColorList;

发表于 分类于 本文字数： 2.7k 阅读时长 ≈ 2 分钟

在资源里面定义 style 可以在控件中引用。

如果控件中有指定的样式，则覆盖资源定义的 style

资源样式支持继承。

 <Window.Resources>
    <Style x:Key="btnStyleBase" TargetType="Button">
        <Setter Property="FontSize" Value="30"></Setter>
    </Style>
    <Style x:Key="btnStyle" TargetType="Button" BasedOn="{StaticResource btnStyleBase}">
        <Setter Property="Foreground" Value="Blue"></Setter>
    </Style>
</Window.Resources>
<Grid x:Name="grid_main">
    <Button Style="{StaticResource btnStyle}" Grid.Row="1" Click="Button_Click">
            <Button.FontWeight>Bold</Button.FontWeight>
            ...
    </Button>
...
</Grid>

触发器

可以通过触发器动态改变样式

<Style x:Key="btnStyleBase" TargetType="Button">
    <Setter Property="FontSize" Value="30"></Setter>
    <Style.Triggers>
        <Trigger Property="IsMouseOver" Value="True">
            <Setter Property="Foreground" Value="Red"></Setter>
            <Setter Property="FontSize" Value="10"></Setter>
        </Trigger>
        <Trigger Property="IsMouseOver" Value="False">
            <Setter Property="Foreground" Value="Blue"></Setter>
            <Setter Property="FontSize" Value="30"></Setter>
        </Trigger>
    </Style.Triggers>
</Style>

多条件触发

<MultiTrigger>
    <MultiTrigger.Conditions>
        <Condition Property="IsMouseOver" Value="True"></Condition>
        <Condition Property="IsFocused" Value="True"></Condition>
    </MultiTrigger.Conditions>
    <MultiTrigger.Setters>
        <Setter Property="Foreground" Value="Red"></Setter>
    </MultiTrigger.Setters>
</MultiTrigger>

事件触发器

<Window.Resources>
    <Style x:Key="btnStyleBase" TargetType="Button">
        <Setter Property="FontSize" Value="30"></Setter>
        <Style.Triggers>
            <EventTrigger RoutedEvent="Mouse.MouseEnter">
                <EventTrigger.Actions>
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Duration="0:0:1" 
                            Storyboard.TargetProperty="FontSize" 
                            To="10" ></DoubleAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger.Actions>
            </EventTrigger>
        </Style.Triggers>
    </Style>
    <Style x:Key="btnStyle" TargetType="Button" BasedOn="{StaticResource btnStyleBase}">
        <Setter Property="Foreground" Value="Blue"></Setter>
    </Style>
</Window.Resources>

发表于 更新于 分类于 本文字数： 4.7k 阅读时长 ≈ 4 分钟

TreeViewItem

绑定 TreeView 到数据结构，使用适当的模板渲染内容。

xaml

<TreeView Name="treeView" Padding="0" Margin="5 5 0 5"  Loaded="treeView_Loaded">
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate DataType="{x:Type local:TreeNodeItem}" ItemsSource="{Binding Path=Children}">
            <StackPanel Orientation="Horizontal">
                <TextBlock VerticalAlignment="Center" Text="{Binding name}"></TextBlock>
                <StackPanel.ToolTip>
                    <TextBlock VerticalAlignment="Center" Text="{Binding tips}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>
                </StackPanel.ToolTip>
            </StackPanel>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

展开、收缩

需要在控件的 Loaded 事件里面处理

private void ExpandTree()
{
    if (this.treeView.Items != null && this.treeView.Items.Count > 0)
    {
        foreach (var item in this.treeView.Items)
        {
            DependencyObject dependencyObject = this.treeView.ItemContainerGenerator.ContainerFromItem(item);
            if (dependencyObject != null)//第一次打开程序，dependencyObject为null，会出错
            {
                ((TreeViewItem)dependencyObject).ExpandSubtree();
            }
        }
    }
}

private void treeView_Loaded(object sender, RoutedEventArgs e)
{
    ExpandTree();
}

事件

在 xaml 里面添加事件，对应的 cs 文件里面会添加映射函数

<TreeView Name="treeView" Padding="0" Margin="5 5 0 5"  Loaded="treeView_Loaded" SelectedItemChanged="treeView_SelectedItemChanged">
    ...
</TreeView>

选择某一项

设置需要选择的项目的 IsSelected 为 true 就可以了

// xaml
<TreeView Name="treeView" Padding="0" Margin="5 5 0 5"  Loaded="treeView_Loaded" SelectedItemChanged="treeView_SelectedItemChanged">
    <TreeView.Resources>
        <Style TargetType="TreeViewItem">
            <Setter Property="IsSelected"
        Value="{Binding Path=IsSelected, Mode=TwoWay}" />
        </Style>
    </TreeView.Resources>
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate DataType="{x:Type local:TreeNodeItem}" ItemsSource="{Binding Path=Children}">
            <StackPanel Orientation="Horizontal">
                <TextBlock VerticalAlignment="Center" Text="{Binding name}"></TextBlock>
                <StackPanel.ToolTip>
                    <TextBlock VerticalAlignment="Center" Text="{Binding tips}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>
                </StackPanel.ToolTip>
            </StackPanel>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

// code
internal class TreeNodeItem
{
    public string name { get; set; }
    public string tips { get; set; }
    public int data { get; set; }
    public bool IsSelected { get; set; }

    public List<TreeNodeItem> Children { get; set; }
    public TreeNodeItem()
    {
        Children = new List<TreeNodeItem>();
    }
    public TreeNodeItem(string inName, string inTips,int inData,bool inIsSelected=false)
    {
        name = inName;
        tips = inTips;
        data = inData;
        IsSelected = inIsSelected;
        Children = new List<TreeNodeItem>();
    }
}

失去焦点时设置背景色

<TreeView Name="treeView" Padding="0" Margin="5 5 0 5"  Loaded="treeView_Loaded" 
                      SelectedItemChanged="treeView_SelectedItemChanged">
<TreeView.Resources>
    <Style TargetType="TreeViewItem">
        <Setter Property="IsSelected" Value="{Binding Path=IsSelected, Mode=TwoWay}" />
    </Style>
    <!-- Style the inactive selection the same as active -->
    <SolidColorBrush x:Key="{x:Static SystemColors.InactiveSelectionHighlightBrushKey}"
        Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}" />
    <SolidColorBrush x:Key="{x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}"
        Color="{DynamicResource {x:Static SystemColors.HighlightTextColorKey}}"/>
</TreeView.Resources>
<TreeView.ItemTemplate>
    <HierarchicalDataTemplate DataType="{x:Type local:TreeNodeItem}" ItemsSource="{Binding Path=Children}">
        <StackPanel Orientation="Horizontal">
            <TextBlock VerticalAlignment="Center" Text="{Binding name}"></TextBlock>
            <StackPanel.ToolTip>
                <TextBlock VerticalAlignment="Center" Text="{Binding tips}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>
            </StackPanel.ToolTip>
        </StackPanel>
    </HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>

发表于 更新于 分类于 本文字数： 6.9k 阅读时长 ≈ 6 分钟

grid

When you define a column in a WPF grid you can set the width to one of three possible values:

  • A fixed width,
  • Auto – column will become as wide as necessary to fit its children, or
    • (star) take up any available remaining space

The * is prefixed by a number (default is 1 if no number is specified). The available space is divided among the starred columns in proportion to the prefix number.

<Grid.ColumnDefinitions>
  <ColumnDefinition Width="0.07*"/>
  <ColumnDefinition Width="0.93*"/>
</Grid.ColumnDefinitions>
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发表于 更新于 分类于 本文字数： 27k 阅读时长 ≈ 25 分钟

注意加载数据需要在 Loaded 事件里面。因为表格还没加载完毕时是无法显示数据的。

更新完 dg.ItemsSource 对应的 List 之后，表格会自动更新，增加和删除都可以

自动生成

根据数据源字段自动生成列

<Grid Margin="10">
    <DataGrid Name="dgSimple"></DataGrid>
</Grid>

List<User> users = new List<User>();
users.Add(new User() { dbId=11, Id = 1, Name = "John Doe", Birthday = new DateTime(1971, 7, 23) });
users.Add(new User() { dbId = 12, Id = 2, Name = "Jane Doe", Birthday = new DateTime(1974, 1, 17) });
users.Add(new User() { dbId = 13, Id = 3, Name = "Sammy Doe", Birthday = new DateTime(1991, 9, 2) });

dgSimple.ItemsSource = users;

public class User
{
    public int dbId { get; set; }
    public int Id { get; set; }

    public string Name { get; set; }

    public DateTime Birthday { get; set; }
}
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发表于 分类于 本文字数： 1.6k 阅读时长 ≈ 1 分钟

通过 共享内存 和其他进程通信

try:
    log.info('fireworks_plugin start')
    shm = shared_memory.SharedMemory(create=False, size=mem_share_size, name='fireworksShareMemory')
    with Pair0(dial=address) as s1:
        s1.send(b'python login')
        while True:
            msg = s1.recv().decode(encoding='utf-8')
            print('python:' + msg)
            log.info('receive: ' + msg)
            if msg == 'exit':
                s1.send(b'python bye')
                time.sleep(0.5)
                log.info('exit nng loop')
                break
            elif msg.startswith('datas') or msg.startswith('ready'):
                log.info('receive ' + msg)
                # datas,12332 后面是共享内存数据大小
                # load data process by memory mapping  mmap file
                # 收到的数据格式："datas,size,cur index, all count"
                param_list = msg.split(',')
                if len(param_list) >= 4:
                    # 获取数据大小
                    data_size = int(param_list[1])
                    # 读取共享内存数据放到 share_df_list 里面
                    load_share_data(shm, data_size)
                    # 最后一组数据，接收完毕后可以处理
                    if param_list[2] == param_list[3]:
                        log.info('get last group data')
                        ret = proc_raw_data(share_df_list)
                        print('Python datas_RESULT,' + ''.join(ret))
                        log.info('datas_RESULT,' + ''.join(ret))
                        s1.send(bytes('datas_RESULT,' + ''.join(ret), encoding='gbk'))
                    else:
                        s1.send(b'datas_OK')
                        pass

    # proc_raw_data()
    shm.close()
    shm.unlink()  # Free and release the shared memory block at the very end
    log.info('exit plugin')
except Exception as e:
    import traceback
    traceback.print_exc()
    errMsg = traceback.format_exc()
    print("Error: " + errMsg)
    log.error("call plugin exception." + errMsg)
except:
    import traceback

    traceback.print_exc()
    errMsg = traceback.format_exc()
    print("Error: " + errMsg)
    log.error("call plugin exception." + errMsg)

发表于 更新于 分类于 本文字数： 1.1k 阅读时长 ≈ 1 分钟

安装

pip3 install pynng

使用样例

from pynng import Pair0

with Pair0(dial=address) as s1:
    s1.send(b'python login')
    while True:
        msg = s1.recv().decode(encoding='utf-8')
        print('python:' + msg)
        log.info('receive: ' + msg)
        if msg == 'exit':
            s1.send(b'python bye')
            time.sleep(0.5)
            log.info('exit nng loop')
            break
        elif msg.startswith('datas') or msg.startswith('ready'):
            log.info('receive ' + msg)
            # datas,12332 后面是共享内存数据大小
            # load data process by memory mapping  mmap file
            # 收到的数据格式："datas,size,cur index, all count"
            param_list = msg.split(',')
            if len(param_list) >= 4:
                # 获取数据大小
                data_size = int(param_list[1])
                # 读取共享内存数据放到 share_df_list 里面
                load_share_data(shm, data_size)
                # 最后一组数据，接收完毕后可以处理
                if param_list[2] == param_list[3]:
                    log.info('get last group data')
                    ret = proc_raw_data(share_df_list)
                    print('Python datas_RESULT,' + ''.join(ret))
                    log.info('datas_RESULT,' + ''.join(ret))
                    s1.send(bytes('datas_RESULT,' + ''.join(ret), encoding='gbk'))
                else:
                    s1.send(b'datas_OK')
                    pass

接收数据不全

发送的数据中有中文

发表于 分类于 ， 本文字数： 232 阅读时长 ≈ 1 分钟

设置标题文字

w.setWindowTitle(QObject::tr("remoteCom ver: 2020.06.10"));

设置中心组件

remoteCom::remoteCom(QWidget *parent, Qt::WFlags flags)
	: QMainWindow(parent, flags)
{
	ui.setupUi(this);
	this->setCentralWidget(new QTextEdit(this));
}

发表于 更新于 分类于 本文字数： 523 阅读时长 ≈ 1 分钟

pyd 相当于 dll。好处多多

编译 pyd

装了 nuitka 之后，这个简单，这个在使用 winpython 的时候，调用失败了。使用下面的 cython 就可以。

nuitka --mingw64 --module --show-progress --output-dir=o 你的.py
  1. 安装 cython
pip install Cython
  1. 新建 setup.py

根据实际情况修改内容，下面的 language 是支持 python3 

from distutils.core import setup
from Cython.Build import cythonize

setup(
  name = 'arc app',
  ext_modules = cythonize(["proc_ui.py","proc_data.py"],compiler_directives={'language_level': 3}),
)
  1. 生成 pyd
python setup.py build_ext --inplace

我这边这样就出结果了。 没遇到任何问题，改名为 main.pyd
生成了 main.cp38-win_amd64.pyd 文件

  1. 写个入口脚本

发表于 更新于 分类于 本文字数： 1.5k 阅读时长 ≈ 1 分钟

注意 win7 需要 Windows6.1-KB2533623-x64.msu 补丁

查看当前路径

# python 环境下
import sys
sys.path

WinPython

github

pyd 文件搜索路径
set PYTHONPATH = 路径

path 里面添加 dll 路径
tkArcTool\Library\bin

官网下载 python-3.8.3-embed-amd64 版本

注意系统需要先确认一下 3.8.3 安装版能否正常安装，我虚拟机的win7版本过于老旧，缺少补丁包，导致socket dll 加载总是失败。问题找了好久。
我装的 windows 版本 提示缺少 KB2533623 补丁包

修改 python38.pth 内容

添加搜索路径，去掉 import site 前面的注释

python38.zip
.
.\Lib
.\Lib\site-packages
.\DLLs

# Uncomment to run site.main() automatically
import site

进入目录里面，执行 python，进入终端，以下操作都在该终端内执行

安装 pip

pip site
下载 get-pip.py 网页另存为比较快

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py --no-setuptools --no-wheel

get-pip.py options
--no-setuptools
If set, do not attempt to install setuptools

--no-wheel
If set, do not attempt to install wheel

安装其他需要的包

Scripts\pip install pandas  -i https://pypi.tuna.tsinghua.edu.cn/simple 
Scripts\pip install pandas  -i https://pypi.tuna.tsinghua.edu.cn/simple

然后拷贝到目标机就可以使用了。

移除 pip

python -m pip uninstall pip setuptools wheel

添加 tkinter

从虚拟环境中复制下面文件夹和文件

tcl
Lib/tkinter
DLLs/_tkinter.pyd, tcl86t.dll, tk86t.dll

主要问题就是设置搜索路径，让 python 找到库和 dll

set PATH=C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;./Library/bin;./Dlls;./tcl;./Scripts;./libs;./Lib;

ModuleNotFoundError: No module named ‘Tkinter’

tcl folder to embedded_distribution_folder\ (root folder of the embedded distribution)
tkinter folder (which is under Lib) either to embedded_distribution_folder\Lib or to embedded_distribution_folder\
files _tkinter.pyd tcl86t.dll tk86t.dll (which are under DLLs) either to embedded_distribution_folder\DLLs or to embedded_distribution_folder\