mirror of
https://github.com/RGBCube/serenity
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293ab2cdc9
This patch adds scaling function to the move tool. When the cursor is over the lower right corner of the layer, it changes. This is to signify that the layer can be scaled by dragging the mouse. There is currently no preview of the scaling. Doing a resize every time the mouse moves leads to unexpected behavior.
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "MoveTool.h"
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#include "../Image.h"
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#include "../ImageEditor.h"
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#include "../Layer.h"
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#include <LibGUI/Action.h>
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#include <LibGUI/Menu.h>
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#include <LibGUI/Window.h>
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namespace PixelPaint {
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void MoveTool::on_mousedown(Layer* layer, MouseEvent& event)
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{
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if (event.image_event().button() == GUI::MouseButton::Secondary) {
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m_editor->start_panning(event.raw_event().position());
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return;
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}
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if (!layer)
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return;
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auto& layer_event = event.layer_event();
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auto& image_event = event.image_event();
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if (layer_event.button() != GUI::MouseButton::Primary)
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return;
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if (!layer->rect().contains(layer_event.position()) && !m_mouse_in_resize_corner)
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return;
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m_scaling = m_mouse_in_resize_corner;
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m_layer_being_moved = *layer;
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m_event_origin = image_event.position();
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m_layer_origin = layer->location();
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}
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void MoveTool::on_mousemove(Layer* layer, MouseEvent& event)
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{
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if (m_editor->is_panning()) {
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m_editor->pan_to(event.raw_event().position());
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return;
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}
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if (!layer)
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return;
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constexpr int sensitivity = 20;
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Gfx::IntPoint grab_rect_position = Gfx::IntPoint(layer->location().x() + layer->size().width() - sensitivity / 2, layer->location().y() + layer->size().height() - sensitivity / 2);
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Gfx::IntRect grab_rect = Gfx::IntRect(grab_rect_position, Gfx::IntSize(sensitivity, sensitivity));
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auto updated_is_in_lower_right_corner = grab_rect.contains(event.image_event().position()); // check if the mouse is in the lower right corner
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if (m_mouse_in_resize_corner != updated_is_in_lower_right_corner) {
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m_mouse_in_resize_corner = updated_is_in_lower_right_corner;
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m_editor->update_tool_cursor();
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}
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auto& image_event = event.image_event();
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if (!m_layer_being_moved || m_scaling)
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return;
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auto delta = image_event.position() - m_event_origin;
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m_layer_being_moved->set_location(m_layer_origin.translated(delta));
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m_editor->layers_did_change();
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}
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void MoveTool::on_mouseup(Layer* layer, MouseEvent& event)
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{
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if (event.image_event().button() == GUI::MouseButton::Secondary) {
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m_editor->stop_panning();
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m_editor->set_override_cursor(cursor());
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return;
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}
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if (!layer)
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return;
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auto& layer_event = event.layer_event();
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if (layer_event.button() != GUI::MouseButton::Primary)
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return;
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if (m_scaling) {
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auto& cursor_location = event.image_event().position();
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auto new_size = Gfx::IntSize(abs(m_layer_being_moved->location().x() - cursor_location.x()), abs(m_layer_being_moved->location().y() - cursor_location.y()));
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// TODO: Change this according to which direction the user is scaling
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auto new_location = Gfx::IntPoint(m_layer_being_moved->location().x(), m_layer_being_moved->location().y());
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m_editor->active_layer()->resize(new_size, new_location, Gfx::Painter::ScalingMode::BilinearBlend);
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}
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m_scaling = false;
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m_layer_being_moved = nullptr;
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m_editor->did_complete_action(tool_name());
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}
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void MoveTool::on_keydown(GUI::KeyEvent& event)
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{
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if (m_scaling)
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return;
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if (event.modifiers() != 0)
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return;
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auto* layer = m_editor->active_layer();
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if (!layer)
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return;
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auto new_location = layer->location();
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switch (event.key()) {
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case Key_Up:
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new_location.translate_by(0, -1);
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break;
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case Key_Down:
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new_location.translate_by(0, 1);
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break;
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case Key_Left:
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new_location.translate_by(-1, 0);
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break;
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case Key_Right:
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new_location.translate_by(1, 0);
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break;
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default:
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return;
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}
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layer->set_location(new_location);
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m_editor->layers_did_change();
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}
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Variant<Gfx::StandardCursor, NonnullRefPtr<Gfx::Bitmap>> MoveTool::cursor()
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{
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if (m_mouse_in_resize_corner || m_scaling)
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return Gfx::StandardCursor::ResizeDiagonalTLBR;
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return Gfx::StandardCursor::Move;
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}
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}
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