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cd5570670c
Following in the footsteps of <input type=checkbox>, this patch adds LayoutButton which implements a basic push button using LibGfx styling primitives.
119 lines
4.2 KiB
C++
119 lines
4.2 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 <LibGUI/Event.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Font.h>
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#include <LibGfx/StylePainter.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/Layout/LayoutButton.h>
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#include <LibWeb/Page/Frame.h>
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namespace Web {
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LayoutButton::LayoutButton(DOM::Document& document, HTML::HTMLInputElement& element, NonnullRefPtr<CSS::StyleProperties> style)
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: LayoutReplaced(document, element, move(style))
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{
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}
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LayoutButton::~LayoutButton()
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{
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}
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void LayoutButton::layout(LayoutMode layout_mode)
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{
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auto& font = specified_style().font();
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set_intrinsic_width(font.width(node().value()) + 20);
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set_has_intrinsic_width(true);
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set_intrinsic_height(20);
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set_has_intrinsic_height(true);
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LayoutReplaced::layout(layout_mode);
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}
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void LayoutButton::paint(PaintContext& context, PaintPhase phase)
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{
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if (!is_visible())
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return;
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LayoutReplaced::paint(context, phase);
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if (phase == PaintPhase::Foreground) {
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bool hovered = document().hovered_node() == &node();
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Gfx::StylePainter::paint_button(context.painter(), enclosing_int_rect(absolute_rect()), context.palette(), Gfx::ButtonStyle::Normal, m_being_pressed, hovered, node().checked(), node().enabled());
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auto text_rect = enclosing_int_rect(absolute_rect());
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if (m_being_pressed)
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text_rect.move_by(1, 1);
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context.painter().draw_text(text_rect, node().value(), specified_style().font(), Gfx::TextAlignment::Center);
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}
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}
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void LayoutButton::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned button, unsigned)
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{
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if (button != GUI::MouseButton::Left || !node().enabled())
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return;
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m_being_pressed = true;
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set_needs_display();
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m_tracking_mouse = true;
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frame().event_handler().set_mouse_event_tracking_layout_node(this);
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}
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void LayoutButton::handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint& position, unsigned button, unsigned)
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{
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if (!m_tracking_mouse || button != GUI::MouseButton::Left || !node().enabled())
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return;
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// NOTE: Handling the click may run arbitrary JS, which could disappear this node.
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NonnullRefPtr protected_this = *this;
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NonnullRefPtr protected_frame = frame();
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bool is_inside = enclosing_int_rect(absolute_rect()).contains(position);
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if (is_inside)
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node().did_click_button({});
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m_being_pressed = false;
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m_tracking_mouse = false;
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protected_frame->event_handler().set_mouse_event_tracking_layout_node(nullptr);
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}
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void LayoutButton::handle_mousemove(Badge<EventHandler>, const Gfx::IntPoint& position, unsigned, unsigned)
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{
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if (!m_tracking_mouse || !node().enabled())
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return;
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bool is_inside = enclosing_int_rect(absolute_rect()).contains(position);
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if (m_being_pressed == is_inside)
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return;
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m_being_pressed = is_inside;
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set_needs_display();
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}
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}
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