从QT复选框到Postgresql的星期选择 [英] Day(s) of week selection from QT checkbox to Postgresql

问题描述

我有一组复选框代表我的Qt应用程序GUI中的一周中的几天，我选择一天或多天，根据哪些框被选中，传递一个查询字符串到PostgreSQL为了显示某些数据天 - 例如果我检查星期一和星期三，提取（dow从时间戳）= 1或提取（dow从时间戳）= 3 应该添加到我的查询。我刚刚打了一个粗糙的解决方案 - 虽然还没有测试，因为我写这个，但我想知道是否有一个更短，更优雅的方法，我错过了这里。代码如下： queryAdditionCalltimePart 和 queryAdditionCallStampPart 字符串后来添加到我的主查询的 QString 之前执行主查询 -

I have a group of checkboxes representing the days of a week in my Qt application GUI and I select one or many days, and depending on which boxes are checked, pass a query string to PostgreSQL in order to display certain data on those days -e.g. if I checked monday and wednesday, extract (dow from timestamp) = 1 or extract(dow from timestamp) = 3 should be added to my query. I have just typed a crude solution -though haven't tested yet as I write this-, but I was wondering if there is a shorter -and more elegant- approach that I'm missing out here. The code is as below: -the queryAdditionCalltimePart and queryAdditionCallStampPart strings are later added to the relevant parts of my main query's QString before the main query is executed-

bool checkboxArray[7];
bool mult = false;
checkboxArray[0] = this->ui->checkBoxMonday->isChecked();
checkboxArray[1] = this->ui->checkBoxTuesday->isChecked();
checkboxArray[2] = this->ui->checkBoxWednesday->isChecked();
checkboxArray[3] = this->ui->checkBoxThursday->isChecked();
checkboxArray[4] = this->ui->checkBoxFriday->isChecked();
checkboxArray[5] = this->ui->checkBoxSaturday->isChecked();
checkboxArray[6] = this->ui->checkBoxSunday->isChecked();
QString queryAdditionCalltimePart = "";
QString queryAdditionCalStampPart = "";
int count = 0;

queryAdditionCalltimePart.append("(");
queryAdditionCalStampPart.append("(");
for(int i = 0; i < 7; i++)
{
    if(checkboxArray[i] == true)
    {
        count++;
    }
}


int x = 0;

for(int i = 0; i < 7; i++)
{
    if(checkboxArray[i] == true)
    {
        queryAdditionCalltimePart.append("(SELECT EXTRACT(DOW FROM calltime) = '" +QString::number(i+1)+"')");
        queryAdditionCalStampPart.append("(SELECT EXTRACT(DOW FROM cal.stamp) = '" +QString::number(i+1)+"')");

    }

        if(count > 1 && checkboxArray[i] == true)
    {
        if(x == count - 1)
        {
        }
        else
        {
            queryAdditionCalltimePart.append("OR");
            queryAdditionCalStampPart.append("OR"); 
            x++;
        }
    }
}


queryAdditionCalltimePart.append(")");
queryAdditionCalStampPart.append(")");

推荐答案

您可以向Qt中的任何窗口小部件添加属性， a href =http://qt-project.org/doc/qt-4.8/qobject.html#setProperty =nofollow> http://qt-project.org/doc/qt-4.8/qobject。 html＃setProperty 。该属性可以有您想要的任何信息。

You can add properties to any widget in Qt, http://qt-project.org/doc/qt-4.8/qobject.html#setProperty. The property can have any information that you want.

在特定情况下，将SQL字符串作为每个复选框的属性添加更为清晰。

In your particular case, it would be cleaner to attach the SQL string as a property for each checkbox.

this->ui->checkBoxMonday->setProperty("sql", 
        "(SELECT EXTRACT(DOW FROM calltime) = '" +QString::number(i+1)+"') OR ";

$ b b

收到用户输入后，只需添加复选框属性，然后删除最终的OR。

Once you receive the user input, simply append the check box properties and remove the final OR.

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