fear: Add hint-trigger for call code completion (#266)

widgets/CompletionHintHandler.cpp

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "CompletionHintHandler.hpp"
+#include "CompletionHintWidget.hpp"
+
+#include <texteditor/texteditor.h>
+
+namespace QodeAssist {
+
+CompletionHintHandler::CompletionHintHandler() = default;
+
+CompletionHintHandler::~CompletionHintHandler()
+{
+    hideHint();
+}
+
+void CompletionHintHandler::showHint(TextEditor::TextEditorWidget *widget, QPoint position, int fontSize)
+{
+    if (!widget) {
+        return;
+    }
+
+    if (!m_hintWidget) {
+        m_hintWidget = new CompletionHintWidget(widget, fontSize);
+    }
+
+    m_hintWidget->move(position);
+    m_hintWidget->show();
+    m_hintWidget->raise();
+}
+
+void CompletionHintHandler::hideHint()
+{
+    if (m_hintWidget) {
+        m_hintWidget->deleteLater();
+        m_hintWidget = nullptr;
+    }
+}
+
+bool CompletionHintHandler::isHintVisible() const
+{
+    return !m_hintWidget.isNull() && m_hintWidget->isVisible();
+}
+
+void CompletionHintHandler::updateHintPosition(TextEditor::TextEditorWidget *widget, QPoint position)
+{
+    if (!widget || !m_hintWidget) {
+        return;
+    }
+
+    m_hintWidget->move(position);
+}
+
+} // namespace QodeAssist
+

widgets/CompletionHintHandler.hpp

@@ -0,0 +1,49 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QPointer>
+#include <functional>
+
+namespace TextEditor {
+class TextEditorWidget;
+}
+
+namespace QodeAssist {
+
+class CompletionHintWidget;
+
+class CompletionHintHandler
+{
+public:
+    CompletionHintHandler();
+    ~CompletionHintHandler();
+
+    void showHint(TextEditor::TextEditorWidget *widget, QPoint position, int fontSize);
+    void hideHint();
+    bool isHintVisible() const;
+    void updateHintPosition(TextEditor::TextEditorWidget *widget, QPoint position);
+
+private:
+    QPointer<CompletionHintWidget> m_hintWidget;
+};
+
+} // namespace QodeAssist
+

widgets/CompletionHintWidget.cpp

@@ -0,0 +1,83 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "CompletionHintWidget.hpp"
+
+#include <QPainter>
+
+#include <utils/theme/theme.h>
+
+namespace QodeAssist {
+
+CompletionHintWidget::CompletionHintWidget(QWidget *parent, int fontSize)
+    : QWidget(parent)
+    , m_isHovered(false)
+{
+    m_accentColor = Utils::creatorTheme()->color(Utils::Theme::TextColorNormal);
+
+    setMouseTracking(true);
+    setFocusPolicy(Qt::NoFocus);
+    setAttribute(Qt::WA_TranslucentBackground);
+    
+    int triangleSize = qMax(6, fontSize / 2);
+    setFixedSize(triangleSize, triangleSize);
+}
+
+void CompletionHintWidget::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event);
+    
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    QColor triangleColor = m_accentColor;
+    triangleColor.setAlpha(m_isHovered ? 255 : 200);
+    
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(triangleColor);
+    
+    QPolygonF triangle;
+    int w = width();
+    int h = height();
+    
+    triangle << QPointF(0, 0)
+             << QPointF(0, h)
+             << QPointF(w, h / 2.0);
+    
+    painter.drawPolygon(triangle);
+}
+
+void CompletionHintWidget::enterEvent(QEnterEvent *event)
+{
+    Q_UNUSED(event);
+    m_isHovered = true;
+    setCursor(Qt::PointingHandCursor);
+    update();
+}
+
+void CompletionHintWidget::leaveEvent(QEvent *event)
+{
+    Q_UNUSED(event);
+    m_isHovered = false;
+    setCursor(Qt::ArrowCursor);
+    update();
+}
+
+} // namespace QodeAssist
+

widgets/CompletionHintWidget.hpp

@@ -0,0 +1,44 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QWidget>
+
+namespace QodeAssist {
+
+class CompletionHintWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit CompletionHintWidget(QWidget *parent = nullptr, int fontSize = 12);
+    ~CompletionHintWidget() override = default;
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+    void enterEvent(QEnterEvent *event) override;
+    void leaveEvent(QEvent *event) override;
+
+private:
+    QColor m_accentColor;
+    bool m_isHovered;
+};
+
+} // namespace QodeAssist
+

widgets/CompletionProgressHandler.cpp

@@ -88,7 +88,6 @@ void CompletionProgressHandler::operateTooltip(
 
     m_progressWidget = new ProgressWidget(editorWidget);
     
-    // Set cancel callback for the widget
     if (m_cancelCallback) {
         m_progressWidget->setCancelCallback(m_cancelCallback);
     }
@@ -96,6 +95,8 @@ void CompletionProgressHandler::operateTooltip(
     const QRect cursorRect = editorWidget->cursorRect(editorWidget->textCursor());
     QPoint globalPos = editorWidget->viewport()->mapToGlobal(cursorRect.topLeft());
     QPoint localPos = editorWidget->mapFromGlobal(globalPos);
+    
+    localPos.rx() += 5;
     localPos.ry() -= m_progressWidget->height() + 5;
     
     if (localPos.y() < 0) {