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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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62
Libraries/LibGUI/Slider.cpp
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@ -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;