tools/chatgui: input bar with emoji panel, custom tab bar, Ctrl+Enter multiline, scroll fixes

tools/chatgui/src/inputbar.cpp

@@ -0,0 +1,125 @@
+#include "inputbar.h"
+#include "emojipanel.h"
+#include <QTextEdit>
+#include <QPushButton>
+#include <QHBoxLayout>
+#include <QFileDialog>
+#include <QDebug>
+#include <QKeyEvent>
+#include <QFontMetrics>
+#include <QScrollBar>
+#include <QApplication>
+
+static QPushButton *makeIconBtn(const QString &text, const QString &tooltip, QWidget *parent) {
+    auto *btn = new QPushButton(text, parent);
+    btn->setFixedSize(34, 34);
+    btn->setCursor(Qt::PointingHandCursor);
+    btn->setToolTip(tooltip);
+    btn->setStyleSheet(
+        "QPushButton { border: none; border-radius: 4px; font-size: 18px; background: transparent; }"
+        "QPushButton:hover { background: palette(light); }"
+    );
+    return btn;
+}
+
+InputBar::InputBar(EmojiPanel *emojiPanel, QWidget *parent)
+    : QWidget(parent)
+    , m_input(new QTextEdit(this))
+    , m_emojiBtn(nullptr)
+    , m_emojiPanel(emojiPanel)
+{
+    auto *layout = new QHBoxLayout(this);
+    layout->setContentsMargins(8, 4, 8, 4);
+    layout->setSpacing(4);
+
+    auto *attachBtn = makeIconBtn(QString::fromUtf8("\xF0\x9F\x93\x8E"),
+                                  QString::fromUtf8("Прикрепить"), this);
+    connect(attachBtn, &QPushButton::clicked, this, [this]() {
+        QString path = QFileDialog::getOpenFileName(this, QString::fromUtf8("Прикрепить файл"));
+        if (!path.isEmpty()) {
+            qDebug() << "Attached:" << path;
+        }
+    });
+    layout->addWidget(attachBtn, 0, Qt::AlignBottom);
+
+    m_input->setAcceptRichText(false);
+    m_input->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    m_input->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    m_input->setTabChangesFocus(true);
+    m_input->setStyleSheet(
+        "QTextEdit { border: 1px solid palette(mid); border-radius: 6px;"
+        " padding: 4px 8px; background: palette(base); }"
+    );
+    m_input->installEventFilter(this);
+    QFontMetrics fm(m_input->font());
+    m_input->setFixedHeight(fm.lineSpacing() + 12);
+    layout->addWidget(m_input, 1);
+
+    m_emojiBtn = makeIconBtn(QString::fromUtf8("\xF0\x9F\x99\x82"),
+                             QString::fromUtf8("Смайлики"), this);
+    layout->addWidget(m_emojiBtn, 0, Qt::AlignBottom);
+
+    auto *sendBtn = makeIconBtn(QString::fromUtf8("\xE2\x9E\xA4"),
+                                QString::fromUtf8("Отправить"), this);
+    sendBtn->setStyleSheet(sendBtn->styleSheet() +
+        "QPushButton { color: palette(highlight); font-weight: bold; }");
+    layout->addWidget(sendBtn, 0, Qt::AlignBottom);
+
+    connect(m_input, &QTextEdit::textChanged, this, &InputBar::adjustInputHeight);
+    connect(sendBtn, &QPushButton::clicked,   this, &InputBar::onSendClicked);
+
+    if (m_emojiPanel) {
+        connect(m_emojiBtn, &QPushButton::clicked, this, [this]() {
+            m_emojiPanel->setVisible(!m_emojiPanel->isVisible());
+        });
+        connect(m_emojiPanel, &EmojiPanel::emojiSelected, this, [this](const QString &emoji) {
+            m_input->insertPlainText(emoji);
+            m_input->setFocus();
+        });
+    }
+}
+
+bool InputBar::eventFilter(QObject *obj, QEvent *event) {
+    if (obj == m_input && event->type() == QEvent::KeyPress) {
+        auto *ke = static_cast<QKeyEvent *>(event);
+        if (ke->key() == Qt::Key_Return || ke->key() == Qt::Key_Enter) {
+            if (ke->modifiers() & Qt::ControlModifier) {
+                m_input->insertPlainText("\n");
+                return true;
+            } else {
+                onSendClicked();
+                return true;
+            }
+        }
+    }
+    return QWidget::eventFilter(obj, event);
+}
+
+void InputBar::adjustInputHeight() {
+    m_input->document()->adjustSize();
+
+    int lineSpacing = m_input->fontMetrics().lineSpacing();
+    int docH = (int)m_input->document()->size().height() + 12;
+    int maxH = 12 * lineSpacing + 12;
+    int h = qBound(lineSpacing + 12, docH, maxH);
+    m_input->setFixedHeight(h);
+
+    bool needScroll = docH > maxH;
+    m_input->setVerticalScrollBarPolicy(needScroll ? Qt::ScrollBarAlwaysOn
+                                                   : Qt::ScrollBarAlwaysOff);
+    if (needScroll) {
+        QTextCursor c = m_input->textCursor();
+        if (c.atEnd())
+            m_input->verticalScrollBar()->setValue(m_input->verticalScrollBar()->maximum());
+        else
+            m_input->ensureCursorVisible();
+    }
+}
+
+void InputBar::onSendClicked() {
+    QString text = m_input->toPlainText().trimmed();
+    if (text.isEmpty()) return;
+    emit sendMessage(text);
+    m_input->clear();
+    if (m_emojiPanel) m_emojiPanel->hide();
+}