458 lines
13 KiB
C++
458 lines
13 KiB
C++
/**
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* @file PaiLineEdit.cpp
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* @brief PaiLineEdit是P.A.I系统定制发布的单行文本框控件
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* @date 2011-10-21
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*/
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#include <QPixmap>
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#include <QIcon>
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#include <QSize>
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#include <QPushButton>
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#include <QHBoxLayout>
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#include <QPainter>
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#include <QValidator>
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#include <QKeyEvent>
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#include <QInputMethodEvent>
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#include <QTimer>
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#include <QFontMetrics>
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#include <QApplication>
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#include <QClipboard>
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#include <QCompleter>
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#include <QMenu>
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#include <QAction>
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#include <QAbstractItemView>
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#include "PaiLineEdit.h"
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#include "SmartCompleter.h"
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using namespace pai::gui;
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#define DEFAULT_HEIGHT 18 ///< 默认高度
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PaiLineEdit::PaiLineEdit(QWidget *pParent) :
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QLineEdit(pParent)
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{
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Init();
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}
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PaiLineEdit::PaiLineEdit(const QString & strText, QWidget *pParent) :
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QLineEdit(strText, pParent)
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{
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Init();
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}
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void PaiLineEdit::InsertCompletion(const QString& completion)
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{
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setText(completion);
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selectAll();
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}
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void PaiLineEdit::SetSmartCompleter(pai::SmartCompleter *pComleter)
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{
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if (m_pCompleter)
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{
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QObject::disconnect(m_pCompleter, 0, this, 0);
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}
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m_pCompleter = pComleter;
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if (!m_pCompleter)
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{
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return;
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}
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m_pCompleter->setWidget(this);
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connect(m_pCompleter, SIGNAL(activated(const QString&)), this, SLOT(InsertCompletion(const QString&)));
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}
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pai::SmartCompleter *PaiLineEdit::SmartCompleter() const
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{
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return m_pCompleter;
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}
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void PaiLineEdit::Init()
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{
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m_pCompleter = NULL;
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m_PromptType = PT_NULL;
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m_pDelayTimer = new QTimer(this);
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m_pDelayTimer->setInterval(300);
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this->setAlignment(Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop);
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m_pRightPBtn = NULL;
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setMinimumHeight(DEFAULT_HEIGHT); // 该值不在style sheet中设置，否则会造成其它位置不能设置该值
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connect(this, SIGNAL(editingFinished()), this, SLOT(TextEditingFinished()));
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connect(this, SIGNAL(textChanged(const QString&)), m_pDelayTimer, SLOT(start()));
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connect(m_pDelayTimer, SIGNAL(timeout()), this, SLOT(EmitEditingStoped()));
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}
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void PaiLineEdit::SetRightIcon(const QString & iconPath)
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{
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QPixmap pixmap(iconPath);
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// 添加右边按钮控件
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if(m_pRightPBtn == NULL)
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{
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m_pRightPBtn = new QPushButton;
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}
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m_pRightPBtn->setIcon(QIcon(pixmap));
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QSize size = QSize(pixmap.size().width() + 6, pixmap.size().height() + 4);
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m_pRightPBtn->setMinimumSize(size);
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m_pRightPBtn->setMaximumSize(size); // 设置按钮的大小为图片的大小
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m_pRightPBtn->setFocusPolicy(Qt::NoFocus); // 得到焦点的时候，不显示虚线框
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m_pRightPBtn->setFlat(true);
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m_pRightPBtn->setDefault(true);
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QHBoxLayout *pHLayout = new QHBoxLayout();
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pHLayout->setContentsMargins(0, 0, 0, 0);
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pHLayout->addStretch();
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pHLayout->addWidget(m_pRightPBtn);
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// 设置输入框中文件输入区， 不让输入的文字被藏在按钮下
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setLayout(pHLayout);
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setTextMargins(0, 1, pixmap.size().width(), 1);
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// 触发信号
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connect(m_pRightPBtn, SIGNAL(clicked()), this, SIGNAL(RightIconClicked()));
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}
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void PaiLineEdit::SetValidatorFailureMessage(const QString & validateFailure)
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{
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m_ValidateMessage = validateFailure;
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}
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void PaiLineEdit::SetExceedMaxLengthMessage(const QString & exceedMaxLength)
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{
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m_ExceedMaxLengthMessage = exceedMaxLength;
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}
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void PaiLineEdit::setPlaceholderText(const QString & text)
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{
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m_PlaceholderText = text;
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}
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QString PaiLineEdit::placeholderText() const
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{
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return m_PlaceholderText;
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}
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void PaiLineEdit::paintEvent(QPaintEvent *pEvent)
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{
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QPainter p(this);
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QLineEdit::paintEvent(pEvent);
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QPainter painter(this);
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// draw placeholder text as needed
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if(!m_PlaceholderText.isEmpty() && text().isEmpty())
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{
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QRect phRect = rect();
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phRect.adjust(4, 0, 0, 0);
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painter.setPen(Qt::gray);
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painter.drawText(phRect, Qt::AlignTop | Qt::AlignLeft, m_PlaceholderText);
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}
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// 当错误模式时显示红线，请勿使用style sheet来设置，以避免重复设置带来的问题
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if(m_PromptType == PT_Error)
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{
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painter.setPen(QColor("#CC0000"));
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painter.drawRect(rect().adjusted(0, 0, -1, -1));
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}
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}
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void PaiLineEdit::keyReleaseEvent(QKeyEvent *pEvent)
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{
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QLineEdit::keyReleaseEvent(pEvent);
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}
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void PaiLineEdit::keyPressEvent(QKeyEvent *pEvent)
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{
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QString orgText = text();//输入前的文本
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int selStart = selectionStart();//输入前选中文本的偏移量
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int cursPos = cursorPosition();//输入前鼠标所在文本位置偏移量
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QString selText = selectedText();//输入前选中文本
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if (m_pCompleter && m_pCompleter->popup()->isVisible())
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{
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// The following keys are forwarded by the completer to the widget
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switch (pEvent->key())
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{
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case Qt::Key_Enter:
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case Qt::Key_Return:
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case Qt::Key_Escape:
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case Qt::Key_Tab:
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case Qt::Key_Backtab:
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pEvent->ignore();
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return; // Let the completer do default behavior
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break;
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default:
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break;
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}
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}
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QLineEdit::keyPressEvent(pEvent); // Don't send the shortcut (CTRL-E) to the text edit.
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if (m_pCompleter != NULL && (pEvent->key() != Qt::Key_Alt))
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{
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m_pCompleter->Update(text());
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m_pCompleter->popup()->setCurrentIndex(m_pCompleter->completionModel()->index(0, 0));
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}
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if((pEvent->key() == Qt::Key_Backspace) || (pEvent->key() == Qt::Key_Delete))
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{
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return;
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}
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if(((pEvent->key() == Qt::Key_C)
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|| (pEvent->key() == Qt::Key_A)
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|| (pEvent->key() == Qt::Key_Z)
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|| (pEvent->key() == Qt::Key_S))
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&& (pEvent->modifiers() & Qt::ControlModifier))
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{
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return;
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}
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if(!((pEvent->key() == Qt::Key_V) && (pEvent->modifiers() & Qt::ControlModifier)))
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{
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CheckInput(pEvent->text());
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}
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if((pEvent->key() == Qt::Key_V) && (pEvent->modifiers() & Qt::ControlModifier))
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{
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QClipboard *pClipboard = QApplication::clipboard();
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if(selStart == -1)
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{
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// 全部粘贴成功
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if(orgText.insert(cursPos, pClipboard->text()) == text())
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{
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return;
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}
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if(orgText.size() > maxLength())
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{
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ShowPromptMessge(m_ExceedMaxLengthMessage, PaiLineEdit::PT_Warning);
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return;
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}
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}
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else
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{
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// 全部替换成功
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orgText.remove(selStart, selText.size());
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if(orgText.insert(selStart, pClipboard->text()) == text())
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{
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return;
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}
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if(orgText.size() > maxLength())
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{
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ShowPromptMessge(m_ExceedMaxLengthMessage, PaiLineEdit::PT_Warning);
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return;
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}
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}
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}
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// 处理键盘的上下键和回车键
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DealDirectionKey(pEvent->key());
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}
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void PaiLineEdit::TextEditingFinished()
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{
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emit EditingStoped(text());
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emit EditingFinished(text());
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}
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PaiLineEdit::~PaiLineEdit()
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{
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int a;
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}
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void PaiLineEdit::inputMethodEvent(QInputMethodEvent *pEvent)
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{
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QLineEdit::inputMethodEvent(pEvent);
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if (m_pCompleter != NULL)
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{
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m_pCompleter->Update(text());
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m_pCompleter->popup()->setCurrentIndex(m_pCompleter->completionModel()->index(0, 0));
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}
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CheckInput(pEvent->commitString());
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}
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void PaiLineEdit::CheckInput(const QString & inputText)
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{
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QString ckText = text() + inputText;
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const QValidator *pValidator = validator();
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int pos = cursorPosition();
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if(ckText.size() > maxLength())
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{
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ShowPromptMessge(m_ExceedMaxLengthMessage, PaiLineEdit::PT_Warning);
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}
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else if(pValidator && (pValidator->validate(ckText, pos) == QValidator::Invalid))
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{
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ShowPromptMessge(m_ValidateMessage, PaiLineEdit::PT_Warning);
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}
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}
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void PaiLineEdit::ShowPromptMessge(const QString & message, PromptType type)
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{
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m_PromptMessage = message;
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m_PromptType = type;
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}
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void PaiLineEdit::EmitEditingStoped()
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{
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m_pDelayTimer->stop();
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emit EditingStoped(text());
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}
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QSize PaiLineEdit::sizeHint() const
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{
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QSize LineEditSizeHint = QLineEdit::sizeHint();
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QFontMetrics fontWidth(font());
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return QSize(fontWidth.width(m_ExceedMaxLengthMessage) + 30, LineEditSizeHint.height());
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}
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void PaiLineEdit::mousePressEvent(QMouseEvent *pEvent)
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{
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if(pEvent->button() == Qt::LeftButton)
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{
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emit LeftMousePress();
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}
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QLineEdit::mousePressEvent(pEvent);
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}
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bool PaiLineEdit::IsEmpty()
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{
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return text().isEmpty();
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}
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void PaiLineEdit::SetEditStopDuration(int duration)
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{
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m_pDelayTimer->setInterval(duration);
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}
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void PaiLineEdit::DealDirectionKey(int key)
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{
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QCompleter *pCompleter = m_pCompleter != NULL ? m_pCompleter : completer();
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if(pCompleter)
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{
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QAbstractItemView *pPopupView = pCompleter->popup();
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if(pPopupView && !pPopupView->isHidden())
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{
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// int key = event->key();
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int count = pPopupView->model()->rowCount();
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QModelIndex currentIndex = pPopupView->currentIndex();
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if(Qt::Key_Down == key)
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{
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// 按向下方向键时，移动光标选中下一个完成列表中的项
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int row = currentIndex.row() + 1;
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if(row >= count)
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{
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row = 0;
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}
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QModelIndex index = pPopupView->model()->index(row, 0);
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pPopupView->setCurrentIndex(index);
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}
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else if(Qt::Key_Up == key)
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{
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// 按向下方向键时，移动光标选中上一个完成列表中的项
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int row = currentIndex.row() - 1;
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if(row < 0)
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{
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row = count - 1;
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}
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QModelIndex index = pPopupView->model()->index(row, 0);
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pPopupView->setCurrentIndex(index);
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}
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else if(Qt::Key_Escape == key)
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{
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// 按下Esc键时，隐藏完成列表
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pPopupView->hide();
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}
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else if((Qt::Key_Enter == key) || (Qt::Key_Return == key))
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{
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// 按下回车键时，使用完成列表中选中的项，并隐藏完成列表
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if(currentIndex.isValid())
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{
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QString text = pPopupView->currentIndex().data().toString();
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setText(text);
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}
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pPopupView->hide();
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}
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}
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else
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{
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// 其他情况，隐藏完成列表，并使用QLineEdit的键盘按下事件
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pPopupView->hide();
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}
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}
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}
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void PaiLineEdit::contextMenuEvent(QContextMenuEvent *pEvent)
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{
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QString orgText = text();//输入前的文本
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int selStart = selectionStart();//输入前选中文本的偏移量
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int cursPos = cursorPosition();//输入前鼠标所在文本位置偏移量
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QString selText = selectedText();//输入前选中文本
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//系统默认的右键菜单
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QMenu *pDefaultMenu = createStandardContextMenu();
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if(pDefaultMenu)
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{
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//菜单中被选中的action
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QAction *pSelectedAction = pDefaultMenu->exec(pEvent->globalPos());
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if(pSelectedAction)
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{
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QString actionText = pSelectedAction->iconText();
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if(actionText.contains(tr("Paste")) || actionText.contains(tr("Ctrl+V")))
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{
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QClipboard *pClipboard = QApplication::clipboard();
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if(selStart == -1)
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{
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// 粘贴板中内容插入文本框
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if(orgText.insert(cursPos, pClipboard->text()) == text())
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{
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delete pDefaultMenu;
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pDefaultMenu = NULL;
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return;
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}
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// 粘贴后输入框中内容长度大于100显示警告
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if(orgText.size() > maxLength())
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{
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ShowPromptMessge(m_ExceedMaxLengthMessage, PaiLineEdit::PT_Warning);
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delete pDefaultMenu;
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pDefaultMenu = NULL;
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return;
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}
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}
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else
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{
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// 移除鼠标选中的文本，插入粘贴板中的文本
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orgText.remove(selStart, selText.size());
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if(orgText.insert(selStart, pClipboard->text()) == text())
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{
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delete pDefaultMenu;
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pDefaultMenu = NULL;
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return;
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}
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// 粘贴后输入框中内容长度大于100显示警告
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if(orgText.size() > maxLength())
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{
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ShowPromptMessge(m_ExceedMaxLengthMessage, PaiLineEdit::PT_Warning);
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delete pDefaultMenu;
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pDefaultMenu = NULL;
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return;
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}
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}
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// 校验是否有不合法的字符
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const QValidator *pValidator = validator();
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int pos = cursorPosition();
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if(pValidator && (pValidator->validate(orgText, pos) == QValidator::Invalid))
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{
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ShowPromptMessge(m_ValidateMessage, PaiLineEdit::PT_Warning);
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}
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}
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}
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}
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delete pDefaultMenu;
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pDefaultMenu = NULL;
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}
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