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LibGUI: Add GUI::AbstractSlider and move generic parts of Slider there

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This will allow us to share some code between Slider and ScrollBar.
This commit is contained in:
Andreas Kling 2020-12-30 14:28:22 +01:00
parent 761169f5c0
commit fa836a4dda
5 changed files with 172 additions and 77 deletions
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82
Libraries/LibGUI/AbstractSlider.cpp Normal file
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@ -0,0 +1,82 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Assertions.h>
#include <AK/StdLibExtras.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Slider.h>
#include <LibGfx/Palette.h>
#include <LibGfx/StylePainter.h>
namespace GUI {
AbstractSlider::AbstractSlider(Orientation orientation)
: m_orientation(orientation)
{
REGISTER_INT_PROPERTY("min", min, set_min);
REGISTER_INT_PROPERTY("max", max, set_max);
REGISTER_INT_PROPERTY("step", step, set_step);
REGISTER_ENUM_PROPERTY("orientation", this->orientation, set_orientation, Orientation,
{ Orientation::Horizontal, "Horizontal" },
{ Orientation::Vertical, "Vertical" });
}
AbstractSlider::~AbstractSlider()
{
}
void AbstractSlider::set_orientation(Orientation value)
{
if (m_orientation == value)
return;
m_orientation = value;
update();
}
void AbstractSlider::set_range(int min, int max)
{
ASSERT(min <= max);
if (m_min == min && m_max == max)
return;
m_min = min;
m_max = max;
m_value = clamp(m_value, m_min, m_max);
update();
}
void AbstractSlider::set_value(int value)
{
value = clamp(value, m_min, m_max);
if (m_value == value)
return;
m_value = value;
update();
if (on_value_changed)
on_value_changed(m_value);
}
}

69
Libraries/LibGUI/AbstractSlider.h Normal file
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@ -0,0 +1,69 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <LibGUI/Widget.h>
namespace GUI {
class AbstractSlider : public Widget {
C_OBJECT_ABSTRACT(AbstractSlider);
public:
virtual ~AbstractSlider() override;
void set_orientation(Orientation value);
Orientation orientation() const { return m_orientation; }
int value() const { return m_value; }
int min() const { return m_min; }
int max() const { return m_max; }
int step() const { return m_step; }
void set_range(int min, int max);
void set_value(int);
void set_min(int min) { set_range(min, max()); }
void set_max(int max) { set_range(min(), max); }
void set_step(int step) { m_step = step; }
Function<void(int)> on_value_changed;
protected:
explicit AbstractSlider(Orientation = Orientation::Vertical);
private:
void set_knob_hovered(bool);
int m_value { 0 };
int m_min { 0 };
int m_max { 100 };
int m_step { 1 };
Orientation m_orientation { Orientation::Horizontal };
};
}

1
Libraries/LibGUI/CMakeLists.txt
View file

@ -1,6 +1,7 @@
set(SOURCES
AboutDialog.cpp
AbstractButton.cpp
AbstractSlider.cpp
AbstractTableView.cpp
AbstractView.cpp
Action.cpp

62
Libraries/LibGUI/Slider.cpp
View file

@ -34,55 +34,17 @@
namespace GUI {
Slider::Slider(Orientation orientation)
: m_orientation(orientation)
: AbstractSlider(orientation)
{
REGISTER_INT_PROPERTY("min", min, set_min);
REGISTER_INT_PROPERTY("max", max, set_max);
REGISTER_INT_PROPERTY("step", step, set_step);
REGISTER_ENUM_PROPERTY("knob_size_mode", knob_size_mode, set_knob_size_mode, KnobSizeMode,
{ KnobSizeMode::Fixed, "Fixed" },
{ KnobSizeMode::Proportional, "Proportional" });
REGISTER_ENUM_PROPERTY("orientation", this->orientation, set_orientation, Orientation,
{ Orientation::Horizontal, "Horizontal" },
{ Orientation::Vertical, "Vertical" });
}
Slider::~Slider()
{
}
void Slider::set_orientation(Orientation value)
{
if (m_orientation == value)
return;
m_orientation = value;
update();
}
void Slider::set_range(int min, int max)
{
ASSERT(min <= max);
if (m_min == min && m_max == max)
return;
m_min = min;
m_max = max;
m_value = clamp(m_value, m_min, m_max);
update();
}
void Slider::set_value(int value)
{
value = clamp(value, m_min, m_max);
if (m_value == value)
return;
m_value = value;
update();
if (on_value_changed)
on_value_changed(m_value);
}
void Slider::paint_event(PaintEvent& event)
{
Painter painter(*this);
@ -112,16 +74,16 @@ Gfx::IntRect Slider::knob_rect() const
rect.set_secondary_size_for_orientation(orientation(), knob_secondary_size());
if (knob_size_mode() == KnobSizeMode::Fixed) {
if (m_max - m_min) {
float scale = (float)inner_rect.primary_size_for_orientation(orientation()) / (float)(m_max - m_min);
rect.set_primary_offset_for_orientation(orientation(), inner_rect.primary_offset_for_orientation(orientation()) + ((int)((m_value - m_min) * scale)) - (knob_fixed_primary_size() / 2));
if (max() - min()) {
float scale = (float)inner_rect.primary_size_for_orientation(orientation()) / (float)(max() - min());
rect.set_primary_offset_for_orientation(orientation(), inner_rect.primary_offset_for_orientation(orientation()) + ((int)((value() - min()) * scale)) - (knob_fixed_primary_size() / 2));
} else
rect.set_primary_size_for_orientation(orientation(), 0);
rect.set_primary_size_for_orientation(orientation(), knob_fixed_primary_size());
} else {
float scale = (float)inner_rect.primary_size_for_orientation(orientation()) / (float)(m_max - m_min + 1);
rect.set_primary_offset_for_orientation(orientation(), inner_rect.primary_offset_for_orientation(orientation()) + ((int)((m_value - m_min) * scale)));
if (m_max - m_min)
float scale = (float)inner_rect.primary_size_for_orientation(orientation()) / (float)(max() - min() + 1);
rect.set_primary_offset_for_orientation(orientation(), inner_rect.primary_offset_for_orientation(orientation()) + ((int)((value() - min()) * scale)));
if (max() - min())
rect.set_primary_size_for_orientation(orientation(), ::max((int)(scale), knob_fixed_primary_size()));
else
rect.set_primary_size_for_orientation(orientation(), inner_rect.primary_size_for_orientation(orientation()));
@ -139,13 +101,13 @@ void Slider::mousedown_event(MouseEvent& event)
if (knob_rect().contains(event.position())) {
m_dragging = true;
m_drag_origin = event.position();
m_drag_origin_value = m_value;
m_drag_origin_value = value();
return;
} else {
if (event.position().primary_offset_for_orientation(orientation()) > knob_rect().last_edge_for_orientation(orientation()))
set_value(m_value + 1);
set_value(value() + 1);
else if (event.position().primary_offset_for_orientation(orientation()) < knob_rect().first_edge_for_orientation(orientation()))
set_value(m_value - 1);
set_value(value() - 1);
}
}
return Widget::mousedown_event(event);
@ -157,7 +119,7 @@ void Slider::mousemove_event(MouseEvent& event)
if (m_dragging) {
float delta = event.position().primary_offset_for_orientation(orientation()) - m_drag_origin.primary_offset_for_orientation(orientation());
float scrubbable_range = inner_rect().primary_size_for_orientation(orientation());
float value_steps_per_scrubbed_pixel = (m_max - m_min) / scrubbable_range;
float value_steps_per_scrubbed_pixel = (max() - min()) / scrubbable_range;
float new_value = m_drag_origin_value + (value_steps_per_scrubbed_pixel * delta);
set_value((int)new_value);
return;
@ -177,7 +139,7 @@ void Slider::mouseup_event(MouseEvent& event)
void Slider::mousewheel_event(MouseEvent& event)
{
auto acceleration_modifier = m_step;
auto acceleration_modifier = step();
if (event.modifiers() == KeyModifier::Mod_Ctrl && knob_size_mode() == KnobSizeMode::Fixed)
acceleration_modifier *= 6;

35
Libraries/LibGUI/Slider.h
View file

@ -26,12 +26,13 @@
#pragma once
#include <LibGUI/Widget.h>
#include <LibGUI/AbstractSlider.h>
namespace GUI {
class Slider : public Widget {
C_OBJECT(Slider)
class Slider : public AbstractSlider {
C_OBJECT(Slider);
public:
enum class KnobSizeMode {
Fixed,
@ -40,21 +41,6 @@ public:
virtual ~Slider() override;
void set_orientation(Orientation value);
Orientation orientation() const { return m_orientation; }
int value() const { return m_value; }
int min() const { return m_min; }
int max() const { return m_max; }
int step() const { return m_step; }
void set_range(int min, int max);
void set_value(int);
void set_min(int min) { set_range(min, max()); }
void set_max(int max) { set_range(min(), max); }
void set_step(int step) { m_step = step; }
void set_knob_size_mode(KnobSizeMode mode) { m_knob_size_mode = mode; }
KnobSizeMode knob_size_mode() const { return m_knob_size_mode; }
@ -72,8 +58,6 @@ public:
return rect().shrunken(0, 20);
}
Function<void(int)> on_value_changed;
protected:
explicit Slider(Orientation = Orientation::Vertical);
@ -88,20 +72,16 @@ protected:
private:
void set_knob_hovered(bool);
int m_value { 0 };
int m_min { 0 };
int m_max { 100 };
int m_step { 1 };
bool m_knob_hovered { false };
bool m_dragging { false };
int m_drag_origin_value { 0 };
Gfx::IntPoint m_drag_origin;
KnobSizeMode m_knob_size_mode { KnobSizeMode::Fixed };
Orientation m_orientation { Orientation::Horizontal };
};
class VerticalSlider final : public Slider {
C_OBJECT(VerticalSlider)
C_OBJECT(VerticalSlider);
public:
virtual ~VerticalSlider() override { }
@ -113,7 +93,8 @@ private:
};
class HorizontalSlider final : public Slider {
C_OBJECT(HorizontalSlider)
C_OBJECT(HorizontalSlider);
public:
virtual ~HorizontalSlider() override { }