82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
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* Copyright (C) 2020-2022 Roy Qu (royqh1979@gmail.com)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef LINENUMBERTEXTEDITOR_H
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#define LINENUMBERTEXTEDITOR_H
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#include <QPlainTextEdit>
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class LineNumberTextEditor : public QPlainTextEdit
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{
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Q_OBJECT
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public:
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LineNumberTextEditor(QWidget *parent = nullptr);
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void lineNumberAreaPaintEvent(QPaintEvent *event);
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int lineNumberAreaWidth();
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const QColor &lineNumberAreaForeground() const;
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void setLineNumberAreaForeground(const QColor &newLineNumberAreaForeground);
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const QColor &lineNumberAreaBackground() const;
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void setLineNumberAreaBackground(const QColor &newLineNumberAreaBackground);
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const QColor &lineNumberAreaCurrentLine() const;
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void setLineNumberAreaCurrentLine(const QColor &newLineNumberAreaCurrentLine);
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signals:
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void lineNumberAreaCurrentLineChanged();
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protected:
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void resizeEvent(QResizeEvent *event) override;
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private slots:
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void updateLineNumberAreaWidth(int newBlockCount);
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void highlightCurrentLine();
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void updateLineNumberArea(const QRect &rect, int dy);
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private:
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QWidget *lineNumberArea;
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QColor mLineNumberAreaForeground;
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QColor mLineNumberAreaBackground;
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QColor mLineNumberAreaCurrentLine;
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};
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class LineNumberArea : public QWidget
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{
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public:
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LineNumberArea(LineNumberTextEditor *editor) : QWidget(editor), mParentEditor(editor)
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{}
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QSize sizeHint() const override
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{
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return QSize(mParentEditor->lineNumberAreaWidth(), 0);
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}
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protected:
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void paintEvent(QPaintEvent *event) override
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{
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mParentEditor->lineNumberAreaPaintEvent(event);
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}
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private:
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LineNumberTextEditor *mParentEditor;
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};
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#endif // LINENUMBERTEXTEDITOR_H
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