mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 12:48:10 +00:00
ImageViewer: Inherit from AbstractZoomPanWidget
This commit is contained in:
Mustafa Quraish
Andreas Kling
parent
5d7f2086b0
commit
b21d128075
2 changed files with 21 additions and 117 deletions
|
|
@ -2,6 +2,7 @@
|
|||
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
||||
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021, Mohsan Ali <mohsan0073@gmail.com>
|
||||
* Copyright (c) 2022, Mustafa Quraish <mustafa@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -38,6 +39,7 @@ void ViewWidget::clear()
|
|||
m_bitmap = nullptr;
|
||||
if (on_image_change)
|
||||
on_image_change(m_bitmap);
|
||||
set_original_rect({});
|
||||
m_path = {};
|
||||
|
||||
reset_view();
|
||||
|
|
@ -47,7 +49,8 @@ void ViewWidget::clear()
|
|||
void ViewWidget::flip(Gfx::Orientation orientation)
|
||||
{
|
||||
m_bitmap = m_bitmap->flipped(orientation).release_value_but_fixme_should_propagate_errors();
|
||||
set_scale(m_scale);
|
||||
set_original_rect(m_bitmap->rect());
|
||||
set_scale(scale());
|
||||
|
||||
resize_window();
|
||||
}
|
||||
|
|
@ -55,7 +58,8 @@ void ViewWidget::flip(Gfx::Orientation orientation)
|
|||
void ViewWidget::rotate(Gfx::RotationDirection rotation_direction)
|
||||
{
|
||||
m_bitmap = m_bitmap->rotated(rotation_direction).release_value_but_fixme_should_propagate_errors();
|
||||
set_scale(m_scale);
|
||||
set_original_rect(m_bitmap->rect());
|
||||
set_scale(scale());
|
||||
|
||||
resize_window();
|
||||
}
|
||||
|
|
@ -117,50 +121,6 @@ void ViewWidget::navigate(Directions direction)
|
|||
this->load_from_file(m_files_in_same_dir.at(index));
|
||||
}
|
||||
|
||||
void ViewWidget::set_scale(float scale)
|
||||
{
|
||||
if (m_bitmap.is_null())
|
||||
return;
|
||||
|
||||
if (scale < 0.1f)
|
||||
scale = 0.1f;
|
||||
if (scale > 10.f)
|
||||
scale = 10.f;
|
||||
|
||||
m_scale = scale;
|
||||
|
||||
Gfx::IntSize new_size;
|
||||
new_size.set_width(m_bitmap->width() * m_scale);
|
||||
new_size.set_height(m_bitmap->height() * m_scale);
|
||||
m_bitmap_rect.set_size(new_size);
|
||||
|
||||
if (on_scale_change)
|
||||
on_scale_change(m_scale);
|
||||
|
||||
relayout();
|
||||
}
|
||||
|
||||
void ViewWidget::relayout()
|
||||
{
|
||||
if (m_bitmap.is_null())
|
||||
return;
|
||||
|
||||
Gfx::IntSize new_size = m_bitmap_rect.size();
|
||||
|
||||
Gfx::IntPoint new_location;
|
||||
new_location.set_x((width() / 2) - (new_size.width() / 2) - m_pan_origin.x());
|
||||
new_location.set_y((height() / 2) - (new_size.height() / 2) - m_pan_origin.y());
|
||||
m_bitmap_rect.set_location(new_location);
|
||||
|
||||
update();
|
||||
}
|
||||
|
||||
void ViewWidget::resize_event(GUI::ResizeEvent& event)
|
||||
{
|
||||
relayout();
|
||||
GUI::Widget::resize_event(event);
|
||||
}
|
||||
|
||||
void ViewWidget::doubleclick_event(GUI::MouseEvent&)
|
||||
{
|
||||
on_doubleclick();
|
||||
|
|
@ -177,59 +137,21 @@ void ViewWidget::paint_event(GUI::PaintEvent& event)
|
|||
Gfx::StylePainter::paint_transparency_grid(painter, frame_inner_rect(), palette());
|
||||
|
||||
if (!m_bitmap.is_null())
|
||||
painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect(), 1.0f, m_scaling_mode);
|
||||
painter.draw_scaled_bitmap(content_rect(), *m_bitmap, m_bitmap->rect(), 1.0f, m_scaling_mode);
|
||||
}
|
||||
|
||||
void ViewWidget::mousedown_event(GUI::MouseEvent& event)
|
||||
{
|
||||
if (event.button() != GUI::MouseButton::Primary)
|
||||
return;
|
||||
m_click_position = event.position();
|
||||
m_saved_pan_origin = m_pan_origin;
|
||||
if (event.button() == GUI::MouseButton::Primary)
|
||||
start_panning(event.position());
|
||||
GUI::AbstractZoomPanWidget::mousedown_event(event);
|
||||
}
|
||||
|
||||
void ViewWidget::mouseup_event([[maybe_unused]] GUI::MouseEvent& event) { }
|
||||
|
||||
void ViewWidget::mousemove_event(GUI::MouseEvent& event)
|
||||
void ViewWidget::mouseup_event(GUI::MouseEvent& event)
|
||||
{
|
||||
if (!(event.buttons() & GUI::MouseButton::Primary))
|
||||
return;
|
||||
|
||||
auto delta = event.position() - m_click_position;
|
||||
m_pan_origin = m_saved_pan_origin.translated(
|
||||
-delta.x(),
|
||||
-delta.y());
|
||||
|
||||
relayout();
|
||||
}
|
||||
|
||||
void ViewWidget::mousewheel_event(GUI::MouseEvent& event)
|
||||
{
|
||||
float new_scale = m_scale / AK::exp2(event.wheel_delta() / 8.f);
|
||||
if (new_scale < 0.1f)
|
||||
new_scale = 0.1f;
|
||||
if (new_scale > 10.f)
|
||||
new_scale = 10.f;
|
||||
|
||||
if (new_scale == m_scale) {
|
||||
return;
|
||||
}
|
||||
|
||||
// focus_point is the window position the cursor is pointing to.
|
||||
// The pixel (in image space) the cursor points to is located at
|
||||
// (m_pan_origin + focus_point) / scale_factor.
|
||||
// We want the image after scaling to be panned in such a way that the cursor
|
||||
// will still point to the same image pixel. Basically, we need to solve
|
||||
// (m_pan_origin + focus_point) / old_scale_factor = (new_m_pan_origin + focus_point) / new_scale_factor.
|
||||
Gfx::FloatPoint focus_point {
|
||||
event.x() - width() / 2.0f,
|
||||
event.y() - height() / 2.0f
|
||||
};
|
||||
|
||||
// A little algebra shows that new m_pan_origin equals to:
|
||||
m_pan_origin = (m_pan_origin + focus_point) * (new_scale / m_scale) - focus_point;
|
||||
|
||||
set_scale(new_scale);
|
||||
if (event.button() == GUI::MouseButton::Primary)
|
||||
stop_panning();
|
||||
GUI::AbstractZoomPanWidget::mouseup_event(event);
|
||||
}
|
||||
|
||||
void ViewWidget::load_from_file(const String& path)
|
||||
|
|
@ -257,6 +179,7 @@ void ViewWidget::load_from_file(const String& path)
|
|||
|
||||
m_decoded_image = decoded_image_or_error.release_value();
|
||||
m_bitmap = m_decoded_image->frames[0].bitmap;
|
||||
set_original_rect(m_bitmap->rect());
|
||||
if (on_image_change)
|
||||
on_image_change(m_bitmap);
|
||||
|
||||
|
|
@ -270,7 +193,6 @@ void ViewWidget::load_from_file(const String& path)
|
|||
}
|
||||
|
||||
m_path = Core::File::real_path_for(path);
|
||||
m_scale = -1;
|
||||
reset_view();
|
||||
}
|
||||
|
||||
|
|
@ -286,7 +208,7 @@ void ViewWidget::resize_window()
|
|||
if (window()->is_fullscreen() || window()->is_maximized())
|
||||
return;
|
||||
|
||||
auto absolute_bitmap_rect = m_bitmap_rect;
|
||||
auto absolute_bitmap_rect = content_rect();
|
||||
absolute_bitmap_rect.translate_by(window()->rect().top_left());
|
||||
if (window()->rect().contains(absolute_bitmap_rect))
|
||||
return;
|
||||
|
|
@ -294,7 +216,7 @@ void ViewWidget::resize_window()
|
|||
if (!m_bitmap)
|
||||
return;
|
||||
|
||||
auto new_size = m_bitmap_rect.size();
|
||||
auto new_size = content_rect().size();
|
||||
|
||||
if (new_size.width() < 300)
|
||||
new_size.set_width(300);
|
||||
|
|
@ -305,17 +227,12 @@ void ViewWidget::resize_window()
|
|||
window()->resize(new_size);
|
||||
}
|
||||
|
||||
void ViewWidget::reset_view()
|
||||
{
|
||||
m_pan_origin = { 0, 0 };
|
||||
set_scale(1.f);
|
||||
}
|
||||
|
||||
void ViewWidget::set_bitmap(const Gfx::Bitmap* bitmap)
|
||||
{
|
||||
if (m_bitmap == bitmap)
|
||||
return;
|
||||
m_bitmap = bitmap;
|
||||
set_original_rect(m_bitmap->rect());
|
||||
update();
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue