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

tools/chatgui/src/emojipanel.cpp

@@ -0,0 +1,86 @@
+#include "emojipanel.h"
+#include "emoji.h"
+#include "emojitabbar.h"
+#include <QPushButton>
+#include <QScrollArea>
+#include <QTabWidget>
+#include <QGridLayout>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+
+namespace {
+
+class EmojiTabWidget : public QTabWidget {
+public:
+    using QTabWidget::setTabBar;
+};
+
+} // namespace
+
+EmojiPanel::EmojiPanel(QWidget *parent)
+    : QWidget(parent)
+{
+    setStyleSheet("EmojiPanel { background: palette(window); }");
+    buildPanel(builtinEmojiSet());
+    hide();
+}
+
+void EmojiPanel::showEvent(QShowEvent *event) {
+    if (parentWidget()) {
+        setFixedHeight(parentWidget()->height() / 2);
+    }
+    QWidget::showEvent(event);
+}
+
+void EmojiPanel::buildPanel(const QVector<EmojiCategory> &categories) {
+    auto *tabs = new EmojiTabWidget();
+    tabs->setDocumentMode(true);
+    tabs->setTabBar(new EmojiTabBar(tabs));
+    tabs->setStyleSheet("QTabWidget::pane { border: none; background: rgba(255,255,255,0.6); }");
+
+    for (const auto &cat : categories) {
+        tabs->addTab(buildCategoryPage(cat), cat.name);
+    }
+
+    auto *layout = new QVBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->setSpacing(0);
+    layout->addWidget(tabs);
+}
+
+QWidget *EmojiPanel::buildCategoryPage(const EmojiCategory &cat) {
+    auto *scroll = new QScrollArea();
+    scroll->setWidgetResizable(true);
+    scroll->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    scroll->setStyleSheet("QScrollArea { border: none; }");
+
+    auto *container = new QWidget();
+    auto *grid = new QGridLayout(container);
+    grid->setContentsMargins(4, 4, 4, 4);
+    grid->setSpacing(2);
+
+    int cols = 9;
+    for (int i = 0; i < cat.items.size(); ++i) {
+        auto *btn = new QPushButton(cat.items[i].unicode, container);
+        btn->setFixedSize(32, 32);
+        btn->setCursor(Qt::PointingHandCursor);
+        btn->setStyleSheet(
+            "QPushButton { border: none; border-radius: 4px; font-size: 18px; background: transparent; }"
+            "QPushButton:hover { background: rgba(0,0,0,0.08); }"
+        );
+        btn->setToolTip(cat.items[i].shortcode);
+        connect(btn, &QPushButton::clicked, this, &EmojiPanel::onEmojiClicked);
+        grid->addWidget(btn, i / cols, i % cols);
+    }
+    grid->setRowStretch(grid->rowCount(), 1);
+
+    scroll->setWidget(container);
+    return scroll;
+}
+
+void EmojiPanel::onEmojiClicked() {
+    auto *btn = qobject_cast<QPushButton *>(sender());
+    if (btn) {
+        emit emojiSelected(btn->text());
+    }
+}