mirror of
https://github.com/RGBCube/serenity
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de85cd0907
Instead of using a TableView to show the layer stack, let's build a new custom widget for this purpose and give it some neat features! This patch also introduces an ImageClient interface for Image to notify interested parties about things happening. The LayerListWidget is the first ImageClient and listens for "layer added" and "layer removed" notifications. :^)
147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "LayerListWidget.h"
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#include "Image.h"
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#include "Layer.h"
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#include <LibGUI/Model.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Palette.h>
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namespace PixelPaint {
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LayerListWidget::LayerListWidget()
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{
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}
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LayerListWidget::~LayerListWidget()
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{
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if (m_image)
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m_image->remove_client(*this);
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}
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void LayerListWidget::set_image(Image* image)
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{
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if (m_image == image)
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return;
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if (m_image)
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m_image->remove_client(*this);
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m_image = image;
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if (m_image)
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m_image->add_client(*this);
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m_gadgets.clear();
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if (m_image) {
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for (size_t layer_index = 0; layer_index < m_image->layer_count(); ++layer_index) {
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m_gadgets.append({ layer_index, {} });
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}
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}
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relayout_gadgets();
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}
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void LayerListWidget::resize_event(GUI::ResizeEvent& event)
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{
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Widget::resize_event(event);
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relayout_gadgets();
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}
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void LayerListWidget::paint_event(GUI::PaintEvent& event)
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{
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.fill_rect(event.rect(), palette().button());
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if (!m_image)
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return;
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painter.fill_rect(event.rect(), palette().button());
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for (auto& gadget : m_gadgets) {
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painter.draw_rect(gadget.rect, Color::Black);
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auto& layer = m_image->layer(gadget.layer_index);
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Gfx::Rect thumbnail_rect { gadget.rect.x(), gadget.rect.y(), gadget.rect.height(), gadget.rect.height() };
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thumbnail_rect.shrink(8, 8);
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painter.draw_scaled_bitmap(thumbnail_rect, layer.bitmap(), layer.bitmap().rect());
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Gfx::Rect text_rect { thumbnail_rect.right() + 10, gadget.rect.y(), gadget.rect.width(), gadget.rect.height() };
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text_rect.intersect(gadget.rect);
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painter.draw_text(text_rect, layer.name(), Gfx::TextAlignment::CenterLeft);
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}
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}
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void LayerListWidget::mousedown_event(GUI::MouseEvent& event)
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{
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(void)event;
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}
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void LayerListWidget::mousemove_event(GUI::MouseEvent& event)
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{
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(void)event;
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}
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void LayerListWidget::mouseup_event(GUI::MouseEvent& event)
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{
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(void)event;
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}
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void LayerListWidget::image_did_add_layer(size_t layer_index)
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{
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Gadget gadget { layer_index, {} };
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m_gadgets.insert(layer_index, move(gadget));
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relayout_gadgets();
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}
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void LayerListWidget::image_did_remove_layer(size_t layer_index)
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{
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m_gadgets.remove(layer_index);
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relayout_gadgets();
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}
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void LayerListWidget::image_did_update_layer(size_t layer_index)
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{
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update(m_gadgets[layer_index].rect);
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}
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void LayerListWidget::relayout_gadgets()
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{
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constexpr int gadget_height = 30;
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constexpr int gadget_spacing = 1;
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int y = 0;
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for (auto& gadget : m_gadgets) {
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gadget.rect = { 0, y, width(), gadget_height };
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y += gadget_height + gadget_spacing;
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}
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update();
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}
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}
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