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Pinch to zoom functionality

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This commit is contained in:
Dan Paulat 2025-05-09 19:25:15 -05:00
parent ef480f6d10
commit b169f46f5f
2 changed files with 40 additions and 7 deletions
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31
scwx-qt/source/scwx/qt/map/map_widget.cpp
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@ -53,6 +53,7 @@
#include <QIcon>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QPinchGesture>
#include <QString>
#include <QTextDocument>
@ -169,6 +170,7 @@ public:
void HandleHotkeyPressed(types::Hotkey hotkey, bool isAutoRepeat);
void HandleHotkeyReleased(types::Hotkey hotkey);
void HandleHotkeyUpdates();
void HandlePinchGesture(QPinchGesture* gesture);
void ImGuiCheckFonts();
void InitializeCustomStyles();
void InitializeNewRadarProductView(const std::string& colorPalette);
@ -293,6 +295,8 @@ MapWidget::MapWidget(std::size_t id, const QMapLibre::Settings& settings) :
setFocusPolicy(Qt::StrongFocus);
grabGesture(Qt::GestureType::PinchGesture);
ImGui_ImplQt_RegisterWidget(this);
// Qt parent deals with memory management
@ -603,6 +607,15 @@ void MapWidgetImpl::HandleHotkeyUpdates()
}
}
void MapWidgetImpl::HandlePinchGesture(QPinchGesture* gesture)
{
if (gesture->changeFlags() & QPinchGesture::ChangeFlag::ScaleFactorChanged)
{
double scale = gesture->scaleFactor();
map_->scaleBy(scale, widget_->mapFromGlobal(gesture->centerPoint()));
}
}
common::Level3ProductCategoryMap MapWidget::GetAvailableLevel3Categories()
{
if (p->radarProductManager_ != nullptr)
@ -1396,6 +1409,16 @@ bool MapWidget::event(QEvent* e)
}
pickedEventHandler.reset();
switch (e->type())
{
case QEvent::Type::Gesture:
gestureEvent(static_cast<QGestureEvent*>(e));
break;
default:
break;
}
return QOpenGLWidget::event(e);
}
@ -1425,6 +1448,14 @@ void MapWidget::keyReleaseEvent(QKeyEvent* ev)
}
}
void MapWidget::gestureEvent(QGestureEvent* ev)
{
if (QGesture* pinch = ev->gesture(Qt::PinchGesture))
{
p->HandlePinchGesture(static_cast<QPinchGesture*>(pinch));
}
}
void MapWidget::mousePressEvent(QMouseEvent* ev)
{
p->lastPos_ = ev->position();