add QAD::VirtualKeyboard library, vkbd for widgets with JSON-based description

2024-05-29 21:42:16 +03:00
parent 85adc666ef
commit ac0f5bc325
18 changed files with 871 additions and 3 deletions
--- a/libs/virtual_keyboard/virtual_keyboard_layout_page.cpp
+++ b/libs/virtual_keyboard/virtual_keyboard_layout_page.cpp
@@ -0,0 +1,154 @@
+#include "virtual_keyboard_layout_page.h"
+
+#include <QApplication>
+#include <QBoxLayout>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QKeyEvent>
+#include <QTimer>
+
+static const char property_role[]    = "role";
+static const char property_page[]    = "page";
+static const char property_stretch[] = "stretch";
+
+
+VirtualKeyboardLayoutPage::VirtualKeyboardLayoutPage(QJsonObject root) {
+	auto main_lay = new QBoxLayout(QBoxLayout::TopToBottom);
+	name_         = root["name"].toString();
+	auto rows     = root["rows"].toArray();
+	for (auto row: rows) {
+		auto rowa            = row.toArray();
+		QBoxLayout * row_lay = nullptr;
+		int cur_cols         = 0;
+		for (auto rb: rowa) {
+			auto * b = createButton(rb.toObject());
+			if (!b) continue;
+			if (!row_lay) row_lay = new QBoxLayout(QBoxLayout::LeftToRight);
+			buttons << b;
+			row_lay->addWidget(b, b->property(property_stretch).toInt());
+			++cur_cols;
+		}
+		if (row_lay) main_lay->addLayout(row_lay);
+		columns = piMaxi(columns, cur_cols);
+	}
+	// qDebug() << "VirtualKeyboardLayoutPage" << name;
+	setLayout(main_lay);
+}
+
+
+VirtualKeyboardLayoutPage::~VirtualKeyboardLayoutPage() {}
+
+
+void VirtualKeyboardLayoutPage::setCapital(bool yes) {
+	capital = yes;
+	for (auto b: buttons) {
+		auto role = buttonRole(b);
+		if (role == rLetter) {
+			b->setText(yes ? b->text().toUpper() : b->text().toLower());
+		}
+		if (role == rShift) {
+			// b->setText(yes ? QString::fromUtf8("⇫") : QString::fromUtf8("⇧"));
+			b->setChecked(yes);
+		}
+	}
+}
+
+
+void VirtualKeyboardLayoutPage::setGotoEnabled(bool yes) {
+	for (auto b: buttons) {
+		auto role = buttonRole(b);
+		if (role == rGotoPage) b->setEnabled(yes);
+	}
+}
+
+
+void VirtualKeyboardLayoutPage::setCapitalEnabled(bool yes) {
+	capital_enabled = yes;
+	for (auto b: buttons) {
+		auto role = buttonRole(b);
+		if (role == rShift) b->setEnabled(yes);
+	}
+}
+
+
+void VirtualKeyboardLayoutPage::setButtonsSize(int h) {
+	for (auto b: buttons) {
+		b->setFixedHeight(h);
+	}
+	if (!isVisible()) {
+		adjustSize();
+		layout()->invalidate();
+	}
+}
+
+
+QToolButton * VirtualKeyboardLayoutPage::createButton(QJsonObject jb) {
+	QString role_str = jb["role"].toString();
+	if (role_str.isEmpty()) return nullptr;
+	auto ret    = new QToolButton();
+	int role    = roleFromText(role_str);
+	int stretch = jb["stretch"].toInt();
+	if (stretch == 0) stretch = 1;
+	auto text = jb["text"].toString();
+	ret->setProperty(property_role, role);
+	ret->setProperty(property_stretch, stretch);
+	ret->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+	ret->setFocusPolicy(Qt::NoFocus);
+	ret->setMinimumSize(QSize(2, 2));
+	ret->setAutoRepeat(true);
+	switch (role) {
+	case rBackspace: text = QString::fromUtf8("⌫"); break;
+	case rReturn: text = QString::fromUtf8("⏎"); break;
+	case rSpace: text = QString::fromUtf8("────"); break;
+	case rShift:
+		text = QString::fromUtf8("⤊");
+		ret->setCheckable(true);
+		break; // ⇪⇧⇫⇯⇩⬆⌨
+	case rHide: text = QString::fromUtf8("⨂"); break;
+	case rGotoPage: ret->setProperty(property_page, jb["page"].toString()); break;
+	}
+	ret->setText(text);
+	connect(ret, &QToolButton::clicked, this, [this, role, ret](bool press) {
+		int key = 0;
+		QString text;
+		switch (role) {
+		case rLetter:
+			text = ret->text();
+			if (text.startsWith('&')) text.remove(0, 1);
+			break;
+		case rBackspace: key = Qt::Key_Backspace; break;
+		case rReturn: key = Qt::Key_Return; break;
+		case rSpace:
+			key  = Qt::Key_Space;
+			text = " ";
+			break;
+		case rHide: emit hideRequest(); break;
+		case rShift: setCapital(!isCapital()); break;
+		case rGotoPage: emit gotoPageRequest(ret->property(property_page).toString()); break;
+		}
+		if (key == 0 && text.isEmpty()) return;
+		QApplication::postEvent(QApplication::focusWidget(), new QKeyEvent(QEvent::KeyPress, key, Qt::NoModifier, text));
+		QApplication::postEvent(QApplication::focusWidget(), new QKeyEvent(QEvent::KeyRelease, key, Qt::NoModifier, text));
+		if (role == rLetter && isCapital() && capital_enabled) setCapital(false);
+	});
+	return ret;
+}
+
+
+VirtualKeyboardLayoutPage::Role VirtualKeyboardLayoutPage::roleFromText(QString str) {
+	str = str.toLower();
+	if (str == "l") return rLetter;
+	if (str == "backspace") return rBackspace;
+	if (str == "return") return rReturn;
+	if (str == "space") return rSpace;
+	if (str == "hide") return rHide;
+	if (str == "shift") return rShift;
+	if (str == "gotopage") return rGotoPage;
+	return rInvalid;
+}
+
+
+VirtualKeyboardLayoutPage::Role VirtualKeyboardLayoutPage::buttonRole(QToolButton * b) const {
+	if (!b) return rInvalid;
+	return static_cast<Role>(b->property(property_role).toInt());
+}