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Change direction and center when zooming inspector with scroll wheel

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This commit is contained in:
rfranke 2020-01-23 07:15:29 +01:00
parent 134aa407c0
commit 38c898884d
2 changed files with 21 additions and 7 deletions
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27
rtgui/inspector.cc
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@ -217,18 +217,14 @@ bool Inspector::on_scroll_event(GdkEventScroll *event)
// zoom
beginZoom(event->x, event->y);
if (std::fabs(delta_y) > std::fabs(delta_x))
on_zoom_scale_changed(1.0 + (double)delta_y / imH / deviceScale);
on_zoom_scale_changed(1.0 - (double)delta_y / imH / deviceScale);
else
on_zoom_scale_changed(1.0 + (double)delta_x / imW / deviceScale);
on_zoom_scale_changed(1.0 - (double)delta_x / imW / deviceScale);
return true;
}
// scroll
rtengine::Coord margin; // limit for scroll area
margin.x = rtengine::min<int>(window.get_width() * deviceScale / scale, imW) / 2;
margin.y = rtengine::min<int>(window.get_height() * deviceScale / scale, imH) / 2;
center.set(rtengine::LIM<int>(center.x + delta_x, margin.x, imW - margin.x),
rtengine::LIM<int>(center.y + delta_y, margin.y, imH - margin.y));
moveCenter(delta_x, delta_y, imW, imH, deviceScale);
if (!dirty) {
dirty = true;
@ -238,13 +234,30 @@ bool Inspector::on_scroll_event(GdkEventScroll *event)
return true;
}
void Inspector::moveCenter(int delta_x, int delta_y, int imW, int imH, int deviceScale)
{
rtengine::Coord margin; // limit to image size
margin.x = rtengine::min<int>(window.get_width() * deviceScale / scale, imW) / 2;
margin.y = rtengine::min<int>(window.get_height() * deviceScale / scale, imH) / 2;
center.set(rtengine::LIM<int>(center.x + delta_x, margin.x, imW - margin.x),
rtengine::LIM<int>(center.y + delta_y, margin.y, imH - margin.y));
}
void Inspector::beginZoom(double x, double y)
{
int deviceScale = get_scale_factor();
int imW = currImage->imgBuffer.getWidth();
int imH = currImage->imgBuffer.getHeight();
// limit center to image size
moveCenter(0, 0, imW, imH, deviceScale);
// store center and current position for zooming
dcenterBegin.x = (x - window.get_width()/2) / scale * deviceScale;
dcenterBegin.y = (y - window.get_height()/2) / scale * deviceScale;
centerBegin = center;
zoomScaleBegin = zoomScale;
}
void Inspector::on_zoom_begin(GdkEventSequence *s)

1
rtgui/inspector.h
View File

@ -64,6 +64,7 @@ private:
bool on_button_press_event(GdkEventButton *event) override;
bool on_scroll_event(GdkEventScroll *event) override;
void moveCenter(int delta_x, int delta_y, int imW, int imH, int deviceScale);
Glib::RefPtr<Gtk::GestureZoom> gestureZoom;
void beginZoom(double x, double y);