git-svn-id: svn://db.shs.com.ru/libs@646 a8b55f48-bf90-11e4-a774-851b48703e85

qad/widgets/scroll_spin_box.cpp

@@ -0,0 +1,113 @@
+/*
+    QGLView
+    Copyright (C) 2019  Ivan Pelipenko peri4ko@yandex.ru
+
+    This program 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.
+
+    This program 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 this programap->  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "scroll_spin_box.h"
+#include "ui_scroll_spin_box.h"
+#include <evalspinbox.h>
+#include <qad_types.h>
+#include <QStyleOptionSpinBox>
+#include <QApplication>
+#include <QMouseEvent>
+#include <QStyle>
+#include <QDebug>
+
+
+ScrollSpinBox::ScrollSpinBox(QWidget * parent): QWidget(parent) {
+	ui = new Ui::ScrollSpinBox();
+	ui->setupUi(this);
+	ui->spin->setPrecision(3);
+	ui->handle->installEventFilter(this);
+	last_value = 0.;
+	sensivity_ = 0.2;
+	scroll_scale = sensivity_ / 10;
+	canceled = false;
+}
+
+
+EvalSpinBox * ScrollSpinBox::spin() {
+	return ui->spin;
+}
+
+
+void ScrollSpinBox::changeEvent(QEvent * e) {
+	QWidget::changeEvent(e);
+	switch (e->type()) {
+	case QEvent::LanguageChange:
+		ui->retranslateUi(this);
+		break;
+	default:
+		break;
+	}
+}
+
+
+void ScrollSpinBox::resizeEvent(QResizeEvent * e) {
+	QStyleOptionSpinBox so;
+	so.initFrom(ui->spin);
+	QRect r = qApp->style()->subControlRect(QStyle::CC_SpinBox, &so, QStyle::SC_SpinBoxUp);
+	ui->handle->setFixedWidth(qMax<int>(ui->handle->height() / 3, r.width()));
+	scroll_scale = sensivity_ / appScale(this) / 10;
+}
+
+
+bool ScrollSpinBox::eventFilter(QObject * o, QEvent * e) {
+	switch (e->type()) {
+	case QEvent::MouseButtonPress:
+		mousePress((QMouseEvent*)e);
+		return true;
+	case QEvent::MouseButtonRelease:
+		mouseRelease((QMouseEvent*)e);
+		return true;
+	case QEvent::MouseMove:
+		mouseMove((QMouseEvent*)e);
+		return true;
+	default: break;
+	}
+	return QWidget::eventFilter(o, e);
+}
+
+
+void ScrollSpinBox::mousePress(QMouseEvent * e) {
+	if (canceled) return;
+	if (e->button() == Qt::RightButton) {
+		canceled = true;
+		ui->spin->setExpression(last_text);
+	}
+	if (e->button() == Qt::LeftButton) {
+		down_pos = e->pos();
+		last_text = ui->spin->expression();
+		last_value = ui->spin->value();
+	}
+}
+
+
+void ScrollSpinBox::mouseRelease(QMouseEvent * e) {
+	if (e->buttons() == Qt::NoButton) canceled = false;
+}
+
+
+void ScrollSpinBox::mouseMove(QMouseEvent * e) {
+	if (canceled) return;
+	if (e->buttons().testFlag(Qt::LeftButton)) {
+		double dv = (down_pos.y() - e->pos().y()) * scroll_scale;
+		if (dv != 0.) {
+			QCursor::setPos(ui->handle->mapToGlobal(down_pos));
+			ui->spin->setValue(ui->spin->value() + qAbs(last_value) * dv);
+		}
+	}
+}