#include <cassert>
#include <cmath>
#include <algorithm>
+#include <limits>
#include "signal.hpp"
#include "view.hpp"
using std::abs;
using std::back_inserter;
using std::copy;
+using std::dynamic_pointer_cast;
using std::max;
using std::min;
using std::none_of;
+using std::numeric_limits;
using std::shared_ptr;
using std::stable_sort;
using std::vector;
Viewport::Viewport(View &parent) :
ViewWidget(parent),
- mouse_down_valid_(false),
+ drag_offset_(numeric_limits<double>::signaling_NaN()),
pinch_zoom_active_(false)
{
- setAttribute(Qt::WA_AcceptTouchEvents, true);
-
setAutoFillBackground(true);
setBackgroundRole(QPalette::Base);
}
return nullptr;
}
+void Viewport::item_hover(const shared_ptr<ViewItem> &item)
+{
+ if (item)
+ setCursor(dynamic_pointer_cast<RowItem>(item) ?
+ Qt::SizeVerCursor : Qt::SizeHorCursor);
+ else
+ unsetCursor();
+}
+
+void Viewport::drag()
+{
+ drag_offset_ = view_.offset();
+}
+
+void Viewport::drag_by(const QPoint &delta)
+{
+ if (isnan(drag_offset_))
+ return;
+
+ view_.set_scale_offset(view_.scale(), drag_offset_ -
+ delta.x() * view_.scale());
+}
+
+void Viewport::drag_release()
+{
+ drag_offset_ = numeric_limits<double>::signaling_NaN();
+}
+
vector< shared_ptr<ViewItem> > Viewport::items()
{
vector< shared_ptr<ViewItem> > items(view_.begin(), view_.end());
return items;
}
+bool Viewport::touch_event(QTouchEvent *event)
+{
+ QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
+
+ if (touchPoints.count() != 2) {
+ pinch_zoom_active_ = false;
+ return false;
+ }
+
+ const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
+ const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
+
+ if (!pinch_zoom_active_ ||
+ (event->touchPointStates() & Qt::TouchPointPressed)) {
+ pinch_offset0_ = view_.offset() + view_.scale() * touchPoint0.pos().x();
+ pinch_offset1_ = view_.offset() + view_.scale() * touchPoint1.pos().x();
+ pinch_zoom_active_ = true;
+ }
+
+ double w = touchPoint1.pos().x() - touchPoint0.pos().x();
+ if (abs(w) >= 1.0) {
+ const double scale =
+ fabs((pinch_offset1_ - pinch_offset0_) / w);
+ double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
+ if (scale > 0)
+ view_.set_scale_offset(scale, offset);
+ }
+
+ if (event->touchPointStates() & Qt::TouchPointReleased) {
+ pinch_zoom_active_ = false;
+
+ if (touchPoint0.state() & Qt::TouchPointReleased) {
+ // Primary touch released
+ drag_release();
+ } else {
+ // Update the mouse down fields so that continued
+ // dragging with the primary touch will work correctly
+ mouse_down_point_ = touchPoint0.pos().toPoint();
+ drag();
+ }
+ }
+
+ return true;
+}
+
void Viewport::paintEvent(QPaintEvent*)
{
vector< shared_ptr<RowItem> > row_items(view_.begin(), view_.end());
p.end();
}
-bool Viewport::event(QEvent *event)
-{
- switch (event->type()) {
- case QEvent::TouchBegin:
- case QEvent::TouchUpdate:
- case QEvent::TouchEnd:
- if (touchEvent(static_cast<QTouchEvent *>(event)))
- return true;
- break;
-
- default:
- break;
- }
-
- return QWidget::event(event);
-}
-
-void Viewport::mousePressEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->button() == Qt::LeftButton) {
- mouse_down_point_ = event->pos();
- mouse_down_offset_ = view_.offset();
- mouse_down_valid_ = true;
- }
-}
-
-void Viewport::mouseReleaseEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->button() == Qt::LeftButton)
- mouse_down_valid_ = false;
-}
-
-void Viewport::mouseMoveEvent(QMouseEvent *event)
-{
- assert(event);
-
- if (event->buttons() & Qt::LeftButton) {
- if (!mouse_down_valid_) {
- mouse_down_point_ = event->pos();
- mouse_down_offset_ = view_.offset();
- mouse_down_valid_ = true;
- }
-
- view_.set_scale_offset(view_.scale(),
- mouse_down_offset_ +
- (mouse_down_point_ - event->pos()).x() *
- view_.scale());
- }
-}
-
void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
{
assert(event);
view_.zoom(-2.0, event->x());
}
-void Viewport::wheelEvent(QWheelEvent *event)
+void Viewport::wheelEvent(QWheelEvent *e)
{
- assert(event);
-
- if (event->orientation() == Qt::Vertical) {
- // Vertical scrolling is interpreted as zooming in/out
- view_.zoom(event->delta() / 120, event->x());
- } else if (event->orientation() == Qt::Horizontal) {
- // Horizontal scrolling is interpreted as moving left/right
- view_.set_scale_offset(view_.scale(),
- event->delta() * view_.scale()
- + view_.offset());
- }
-}
-
-bool Viewport::touchEvent(QTouchEvent *event)
-{
- QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
-
- if (touchPoints.count() != 2) {
- pinch_zoom_active_ = false;
- return false;
- }
-
- const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
- const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
-
- if (!pinch_zoom_active_ ||
- (event->touchPointStates() & Qt::TouchPointPressed)) {
- pinch_offset0_ = view_.offset() + view_.scale() * touchPoint0.pos().x();
- pinch_offset1_ = view_.offset() + view_.scale() * touchPoint1.pos().x();
- pinch_zoom_active_ = true;
- }
-
- double w = touchPoint1.pos().x() - touchPoint0.pos().x();
- if (abs(w) >= 1.0) {
- double scale = (pinch_offset1_ - pinch_offset0_) / w;
- if (scale < 0)
- scale = -scale;
- double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
- if (scale > 0)
- view_.set_scale_offset(scale, offset);
- }
-
- if (event->touchPointStates() & Qt::TouchPointReleased) {
- pinch_zoom_active_ = false;
-
- if (touchPoint0.state() & Qt::TouchPointReleased) {
- // Primary touch released
- mouse_down_valid_ = false;
+ assert(e);
+
+ if (e->orientation() == Qt::Vertical)
+ {
+ if (e->modifiers() & Qt::ControlModifier) {
+ // Vertical scrolling with the control key pressed
+ // is intrepretted as vertical scrolling
+ view_.set_v_offset(-view_.owner_visual_v_offset() -
+ (e->delta() * height()) / (8 * 120));
} else {
- // Update the mouse down fields so that continued
- // dragging with the primary touch will work correctly
- mouse_down_point_ = touchPoint0.pos().toPoint();
- mouse_down_offset_ = view_.offset();
- mouse_down_valid_ = true;
+ // Vertical scrolling is interpreted as zooming in/out
+ view_.zoom(e->delta() / 120, e->x());
}
}
-
- return true;
+ else if (e->orientation() == Qt::Horizontal)
+ {
+ // Horizontal scrolling is interpreted as moving left/right
+ view_.set_scale_offset(view_.scale(),
+ e->delta() * view_.scale() + view_.offset());
+ }
}
} // namespace view
projects / pulseview.git / blobdiff