- enhancement: recalc layout info for code editors when dpi changed

NEWS.md

@@ -1,5 +1,6 @@
 Version 0.11.1 For Dev-C++ 7 Beta
  - enhancement: Problem's test case shouldn't accept rich text inputs
+ - enhancement: recalc layout info for code editors when dpi changed
 
 Version 0.11.0 For Dev-C++ 7 Beta
  - enhancement: redesign the expression parser for code completion

RedPandaIDE/editor.h

@@ -351,13 +351,7 @@ public:
 
 protected:
     void mouseReleaseEvent(QMouseEvent *event) override;
-
-    // QWidget interface
-protected:
     void inputMethodEvent(QInputMethodEvent *) override;
-
-    // QWidget interface
-protected:
     void closeEvent(QCloseEvent *event) override;
 };
 

RedPandaIDE/editorlist.cpp

@@ -7,6 +7,7 @@
 #include "settings.h"
 #include "project.h"
 #include "systemconsts.h"
+#include <QApplication>
 
 EditorList::EditorList(QTabWidget* leftPageWidget,
       QTabWidget* rightPageWidget,
@@ -263,6 +264,18 @@ void EditorList::selectPreviousPage()
     }
 }
 
+void EditorList::notifyDPIChanged(int dpi)
+{
+    for (int i=0;i<mLeftPageWidget->count();i++) {
+        Editor* e = static_cast<Editor*>(mLeftPageWidget->widget(i));
+        e->changeDPI(dpi);
+    }
+    for (int i=0;i<mRightPageWidget->count();i++) {
+        Editor* e = static_cast<Editor*>(mRightPageWidget->widget(i));
+        e->changeDPI(dpi);
+    }
+}
+
 Editor *EditorList::operator[](int index)
 {
     if (index>=0 && index<mLeftPageWidget->count()) {

RedPandaIDE/editorlist.h

@@ -53,6 +53,7 @@ public:
     int pageCount();
     void selectNextPage();
     void selectPreviousPage();
+    void notifyDPIChanged(int dpi);
 
     Editor* operator[](int index);
 

RedPandaIDE/main.cpp

@@ -28,7 +28,8 @@ public:
 
 bool WindowLogoutEventFilter::nativeEventFilter(const QByteArray & /*eventType*/, void *message, long *result){
     MSG * pMsg = static_cast<MSG *>(message);
-    if (pMsg->message == WM_QUERYENDSESSION) {
+    switch(pMsg->message) {
+    case WM_QUERYENDSESSION:
         if (pMsg->lParam == 0
                 || (pMsg->lParam & ENDSESSION_LOGOFF)) {
             if (!pMainWindow->close()) {
@@ -38,8 +39,13 @@ bool WindowLogoutEventFilter::nativeEventFilter(const QByteArray & /*eventType*/
             }
             return true;
         }
-    } else if (pMsg->message == WM_DPICHANGED) {
+        break;
-        qDebug()<<"app dpi changed!";
+    case WM_DPICHANGED:
+        if (pMainWindow) {
+            int dpi = HIWORD(pMsg->wParam);
+            pMainWindow->notifyDPIChanged(dpi);
+        }
+       break;
     }
     return false;
 }

RedPandaIDE/mainwindow.cpp

@@ -175,6 +175,8 @@ MainWindow::MainWindow(QWidget *parent)
             this, &MainWindow::onDebugEvaluateInput);
     connect(ui->cbMemoryAddress->lineEdit(), &QLineEdit::returnPressed,
             this, &MainWindow::onDebugMemoryAddressInput);
+    connect(this,&MainWindow::dpiChanged,
+            this,&MainWindow::onDPIChanged);
 
     mTodoParser = std::make_shared<TodoParser>();
     mSymbolUsageManager = std::make_shared<SymbolUsageManager>();
@@ -641,6 +643,11 @@ void MainWindow::setActiveBreakpoint(QString FileName, int Line, bool setFocus)
     }
 }
 
+void MainWindow::dpiChanged(int dpi)
+{
+    mEditorList->notifyDPIChanged(dpi);
+}
+
 void MainWindow::updateAppTitle()
 {
     QString appName=tr("Red Panda Dev-C++");
@@ -5626,6 +5633,11 @@ bool MainWindow::openningFiles() const
     return mOpenningFiles;
 }
 
+void MainWindow::notifyDPIChanged(int dpi)
+{
+    emit dpiChanged(dpi);
+}
+
 
 void MainWindow::on_actionTool_Window_Bars_triggered()
 {

RedPandaIDE/mainwindow.h

@@ -163,6 +163,10 @@ public:
 
     bool openningFiles() const;
 
+    void notifyDPIChanged(int dpi);
+
+signals:
+    void dpiChanged(int dpi);
 public slots:
     void onCompileLog(const QString& msg);
     void onCompileIssue(PCompileIssue issue);
@@ -194,6 +198,7 @@ public slots:
     void onTodoParsing(const QString& filename, int lineNo, int ch, const QString& line);
     void onTodoParseFinished();
     void setActiveBreakpoint(QString FileName, int Line, bool setFocus);
+    void onDPIChanged();
 
 private:
     void prepareProjectForCompile();

RedPandaIDE/qsynedit/SynEdit.cpp

@@ -24,6 +24,7 @@
 
 SynEdit::SynEdit(QWidget *parent) : QAbstractScrollArea(parent)
 {
+    mDPI = -1;
     mLastKey = 0;
     mLastKeyModifiers = Qt::NoModifier;
     mModified = false;
@@ -148,6 +149,8 @@ SynEdit::SynEdit(QWidget *parent) : QAbstractScrollArea(parent)
 
     //setMouseTracking(true);
     setAcceptDrops(true);
+
+    mDPI = fontMetrics().fontDpi();
 }
 
 int SynEdit::displayLineCount() const
@@ -3138,8 +3141,9 @@ void SynEdit::recalcCharExtent()
 
     mTextHeight  = 0;
     mCharWidth = 0;
-    mTextHeight = fontMetrics().lineSpacing();
+    QFontMetrics fm(font());
-    mCharWidth = fontMetrics().horizontalAdvance("M");
+    mTextHeight = fm.lineSpacing();
+    mCharWidth = fm.horizontalAdvance("M");
     if (hasStyles[0]) { // has bold font
         QFont f = font();
         f.setBold(true);
@@ -3177,8 +3181,6 @@ void SynEdit::recalcCharExtent()
             mCharWidth = fm.horizontalAdvance("M");
     }
     mTextHeight += mExtraLineSpacing;
-    //mCharWidth = mCharWidth * dpiFactor();
-    //mTextHeight = mTextHeight * dpiFactor();
 }
 
 QString SynEdit::expandAtWideGlyphs(const QString &S)
@@ -5807,8 +5809,26 @@ void SynEdit::updateMouseCursor(){
     }
 }
 
+void SynEdit::changeDPI(int dpi)
+{
+    if (dpi!=mDPI) {
+        mDPI=dpi;
+    }
+}
+
 void SynEdit::paintEvent(QPaintEvent *event)
 {
+    if (fontMetrics().fontDpi()!=mDPI) {
+        QFont f;
+        f.setFamily(font().family());
+        f.setPointSize(font().pointSize());
+        f.setBold(font().bold());
+        f.setItalic(font().bold());
+        f.setUnderline(font().underline());
+        f.setStrikeOut(font().strikeOut());
+        setFont(f);
+        return;
+    }
     if (mPainterLock>0)
         return;
     if (mPainting)
@@ -6264,18 +6284,6 @@ void SynEdit::dragLeaveEvent(QDragLeaveEvent *)
     //    showCaret();
 }
 
-bool SynEdit::nativeEvent(const QByteArray &eventType, void *message, long *result)
-{
-#ifdef Q_OS_WIN
-    MSG* msg = (MSG*)message;
-    if (msg && msg->message == WM_DPICHANGED) {
-        qDebug()<<"dpi changed!";
-        synFontChanged();
-    }
-#endif
-    return QAbstractScrollArea::nativeEvent(eventType,message,result);
-}
-
 int SynEdit::maxScrollHeight() const
 {
     if (mOptions.testFlag(eoScrollPastEof))

RedPandaIDE/qsynedit/SynEdit.h

@@ -274,6 +274,8 @@ public:
                          const PSynHighlighterAttribute &attr3);
 
     void updateMouseCursor();
+
+    void changeDPI(int dpi);
 // setter && getters
     int topLine() const;
     void setTopLine(int value);
@@ -704,6 +706,8 @@ private:
     BufferCoord mDragSelEndSave;
     bool mDragging;
 
+    int mDPI;
+
 friend class SynEditTextPainter;
 
 // QWidget interface
@@ -737,10 +741,6 @@ void dragEnterEvent(QDragEnterEvent *event) override;
 void dropEvent(QDropEvent *event) override;
 void dragMoveEvent(QDragMoveEvent *event) override;
 void dragLeaveEvent(QDragLeaveEvent *event) override;
-
-// QWidget interface
-protected:
-bool nativeEvent(const QByteArray &eventType, void *message, long *result) override;
 };
 
 #endif // SYNEDIT_H