正文
C++ GUI Qt4编程(12)-6.1FindFileDialog
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1. 主要介绍了QGridLayout, QHBoxLayout, QVBoxLayout3种布局管理器的使用方法。
2. 在linux中，继承自QDialog的对话框，没有最大化、最小化、关闭按钮，如果需要这3个按钮，
需要增加： setWindowFlags(Qt::Widget);
在windows中，即使不加：setWindowFlags(Qt::Widget); 也会有最大化、最小化、关闭按钮。
3. findfiledialog.h
/**/
#ifndef FINDFILEDIALOG_H
#define FINDFILEDIALOG_H #include <QDialog> class QLabel;
class QLineEdit;
class QPushButton;
class QCheckBox;
class QTableWidget;
class QHBoxLayout;
class QVBoxLayout;
class QGridLayout; class FindFileDialog : public QDialog
{
Q_OBJECT public:
FindFileDialog(QWidget *parent = ); private:
QLabel *namedLabel;
QLabel *lookInLabel;
QLineEdit *namedLineEdit;
QLineEdit *lookInLineEdit;
QCheckBox *subfoldersCheckBox;
QTableWidget *tableWidget;
QLabel *messageLabel; QPushButton *findButton;
QPushButton *stopButton;
QPushButton *closeButton;
QPushButton *helpButton; QGridLayout *leftLayout;
QVBoxLayout *rightLayout;
QHBoxLayout *mainLayout;
}; #endif
4. findfiledialog.cpp
/**/
#include "findfiledialog.h" #include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QCheckBox>
#include <QTableWidget>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QGridLayout> FindFileDialog::FindFileDialog(QWidget *parent)
: QDialog(parent)
{
namedLabel = new QLabel(tr("&Named:"));
namedLineEdit = new QLineEdit;
namedLabel->setBuddy(namedLineEdit); lookInLabel = new QLabel(tr("&Look in:"));
lookInLineEdit = new QLineEdit;
lookInLabel->setBuddy(lookInLineEdit); subfoldersCheckBox = new QCheckBox(tr("Include subfolders")); QStringList labels;
labels << tr("Name") << tr("In Folder")
<< tr("Size") << tr("Modified"); tableWidget = new QTableWidget;
tableWidget->setColumnCount();
tableWidget->setHorizontalHeaderLabels(labels); messageLabel = new QLabel(tr("0 files found"));
messageLabel->setFrameShape(QFrame::Panel);
messageLabel->setFrameShadow(QFrame::Sunken); /* QGridLayout
void addWidget(QWidget * widget,
int fromRow,int fromColumn,
int rowSpan,int columnSpan,
Qt::Alignment alignment = 0)
*/
leftLayout = new QGridLayout;
leftLayout->addWidget(namedLabel, , );
leftLayout->addWidget(namedLineEdit, , );
leftLayout->addWidget(lookInLabel, , );
leftLayout->addWidget(lookInLineEdit, , );
/*subfoldersCheckBox的位置坐标(2, 0)，占1行，占2列*/
leftLayout->addWidget(subfoldersCheckBox, , , , );
leftLayout->addWidget(tableWidget, , , , );
leftLayout->addWidget(messageLabel, , , , ); findButton = new QPushButton(tr("&Find"));
stopButton = new QPushButton(tr("&Stop"));
closeButton = new QPushButton(tr("&Close"));
helpButton = new QPushButton(tr("&Help")); connect(closeButton, SIGNAL(clicked()), this, SLOT(close())); rightLayout = new QVBoxLayout;
rightLayout->addWidget(findButton);
rightLayout->addWidget(stopButton);
rightLayout->addWidget(closeButton);
rightLayout->addStretch();
rightLayout->addWidget(helpButton); mainLayout = new QHBoxLayout;
mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout); setLayout(mainLayout);
setWindowTitle(tr("Find Files or Folders"));
/*在linux中，继承自QDialog的对话框没有最大化最小化和关闭按钮*/
setWindowFlags(Qt::Widget); /*在linux中让对话框有最大最小和关闭按钮*/
}
5. main.cpp
/**/
#include <QApplication>
#include "findfiledialog.h" int main(int argc, char *argv[])
{
QApplication app(argc, argv); FindFileDialog dialog;
dialog.show(); return app.exec();
}
6. 不带关闭按钮：
带关闭按钮：
