mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
303 lines
8.9 KiB
C++
303 lines
8.9 KiB
C++
#include <LibGUI/GScrollBar.h>
|
|
#include <SharedGraphics/StylePainter.h>
|
|
#include <SharedGraphics/CharacterBitmap.h>
|
|
#include <SharedGraphics/GraphicsBitmap.h>
|
|
#include <LibGUI/GPainter.h>
|
|
|
|
//#define GUTTER_DOES_PAGEUP_PAGEDOWN
|
|
|
|
static const char* s_up_arrow_bitmap_data = {
|
|
" "
|
|
" # "
|
|
" ### "
|
|
" ##### "
|
|
" ####### "
|
|
" ### "
|
|
" ### "
|
|
" ### "
|
|
" "
|
|
};
|
|
|
|
static const char* s_down_arrow_bitmap_data = {
|
|
" "
|
|
" ### "
|
|
" ### "
|
|
" ### "
|
|
" ####### "
|
|
" ##### "
|
|
" ### "
|
|
" # "
|
|
" "
|
|
};
|
|
|
|
|
|
static const char* s_left_arrow_bitmap_data = {
|
|
" "
|
|
" # "
|
|
" ## "
|
|
" ###### "
|
|
" ####### "
|
|
" ###### "
|
|
" ## "
|
|
" # "
|
|
" "
|
|
};
|
|
|
|
static const char* s_right_arrow_bitmap_data = {
|
|
" "
|
|
" # "
|
|
" ## "
|
|
" ###### "
|
|
" ####### "
|
|
" ###### "
|
|
" ## "
|
|
" # "
|
|
" "
|
|
};
|
|
|
|
static CharacterBitmap* s_up_arrow_bitmap;
|
|
static CharacterBitmap* s_down_arrow_bitmap;
|
|
static CharacterBitmap* s_left_arrow_bitmap;
|
|
static CharacterBitmap* s_right_arrow_bitmap;
|
|
|
|
GScrollBar::GScrollBar(Orientation orientation, GWidget* parent)
|
|
: GWidget(parent)
|
|
, m_orientation(orientation)
|
|
{
|
|
if (!s_up_arrow_bitmap)
|
|
s_up_arrow_bitmap = &CharacterBitmap::create_from_ascii(s_up_arrow_bitmap_data, 9, 9).leak_ref();
|
|
if (!s_down_arrow_bitmap)
|
|
s_down_arrow_bitmap = &CharacterBitmap::create_from_ascii(s_down_arrow_bitmap_data, 9, 9).leak_ref();
|
|
if (!s_left_arrow_bitmap)
|
|
s_left_arrow_bitmap = &CharacterBitmap::create_from_ascii(s_left_arrow_bitmap_data, 9, 9).leak_ref();
|
|
if (!s_right_arrow_bitmap)
|
|
s_right_arrow_bitmap = &CharacterBitmap::create_from_ascii(s_right_arrow_bitmap_data, 9, 9).leak_ref();
|
|
|
|
if (m_orientation == Orientation::Vertical) {
|
|
set_preferred_size({ 15, 0 });
|
|
} else {
|
|
set_preferred_size({ 0, 15 });
|
|
}
|
|
}
|
|
|
|
GScrollBar::~GScrollBar()
|
|
{
|
|
}
|
|
|
|
void GScrollBar::set_range(int min, int max)
|
|
{
|
|
ASSERT(min <= max);
|
|
if (m_min == min && m_max == max)
|
|
return;
|
|
|
|
m_min = min;
|
|
m_max = max;
|
|
|
|
int old_value = m_value;
|
|
if (m_value < m_min)
|
|
m_value = m_min;
|
|
if (m_value > m_max)
|
|
m_value = m_max;
|
|
if (on_change && m_value != old_value)
|
|
on_change(m_value);
|
|
|
|
update();
|
|
}
|
|
|
|
void GScrollBar::set_value(int value)
|
|
{
|
|
if (value < m_min)
|
|
value = m_min;
|
|
if (value > m_max)
|
|
value = m_max;
|
|
if (value == m_value)
|
|
return;
|
|
m_value = value;
|
|
if (on_change)
|
|
on_change(value);
|
|
update();
|
|
}
|
|
|
|
Rect GScrollBar::up_button_rect() const
|
|
{
|
|
return { 0, 0, button_width(), button_height() };
|
|
}
|
|
|
|
Rect GScrollBar::down_button_rect() const
|
|
{
|
|
if (orientation() == Orientation::Vertical)
|
|
return { 0, height() - button_height(), button_width(), button_height() };
|
|
else
|
|
return { width() - button_width(), 0, button_width(), button_height() };
|
|
}
|
|
|
|
Rect GScrollBar::upper_gutter_rect() const
|
|
{
|
|
if (orientation() == Orientation::Vertical)
|
|
return { 0, button_height(), button_width(), scrubber_rect().top() - button_height() };
|
|
else
|
|
return { button_width(), 0, scrubber_rect().x() - button_width(), button_height() };
|
|
}
|
|
|
|
Rect GScrollBar::lower_gutter_rect() const
|
|
{
|
|
auto scrubber_rect = this->scrubber_rect();
|
|
if (orientation() == Orientation::Vertical)
|
|
return { 0, scrubber_rect.bottom() + 1, button_width(), height() - button_height() - scrubber_rect.bottom() - 1};
|
|
else
|
|
return { scrubber_rect.right() + 1, 0, width() - button_width() - scrubber_rect.right() - 1, button_width() };
|
|
}
|
|
|
|
int GScrollBar::scrubbable_range_in_pixels() const
|
|
{
|
|
if (orientation() == Orientation::Vertical)
|
|
return height() - button_height() * 2 - scrubber_size();
|
|
else
|
|
return width() - button_width() * 2 - scrubber_size();
|
|
}
|
|
|
|
bool GScrollBar::has_scrubber() const
|
|
{
|
|
return m_max != m_min;
|
|
}
|
|
|
|
int GScrollBar::scrubber_size() const
|
|
{
|
|
int pixel_range = (orientation() == Orientation::Vertical ? height() : width()) - button_size() * 2;
|
|
int value_range = m_max - m_min;
|
|
return ::max(pixel_range - value_range, button_size());
|
|
}
|
|
|
|
Rect GScrollBar::scrubber_rect() const
|
|
{
|
|
if (!has_scrubber())
|
|
return { };
|
|
float x_or_y;
|
|
if (m_value == m_min)
|
|
x_or_y = button_size();
|
|
else if (m_value == m_max)
|
|
x_or_y = ((orientation() == Orientation::Vertical ? height() : width()) - button_size() - scrubber_size()) + 1;
|
|
else {
|
|
float range_size = m_max - m_min;
|
|
float available = scrubbable_range_in_pixels();
|
|
float step = available / range_size;
|
|
x_or_y = (button_size() + (step * m_value));
|
|
}
|
|
|
|
if (orientation() == Orientation::Vertical)
|
|
return { 0, (int)x_or_y, button_width(), scrubber_size() };
|
|
else
|
|
return { (int)x_or_y, 0, scrubber_size(), button_height() };
|
|
}
|
|
|
|
void GScrollBar::paint_event(GPaintEvent& event)
|
|
{
|
|
GPainter painter(*this);
|
|
painter.add_clip_rect(event.rect());
|
|
|
|
painter.fill_rect(rect(), Color::from_rgb(0xd6d2ce));
|
|
|
|
StylePainter::paint_button(painter, up_button_rect(), ButtonStyle::Normal, false, m_hovered_component == Component::DecrementButton);
|
|
painter.draw_bitmap(up_button_rect().location().translated(3, 3), orientation() == Orientation::Vertical ? *s_up_arrow_bitmap : *s_left_arrow_bitmap, has_scrubber() ? Color::Black : Color::MidGray);
|
|
|
|
StylePainter::paint_button(painter, down_button_rect(), ButtonStyle::Normal, false, m_hovered_component == Component::IncrementButton);
|
|
painter.draw_bitmap(down_button_rect().location().translated(3, 3), orientation() == Orientation::Vertical ? *s_down_arrow_bitmap : *s_right_arrow_bitmap, has_scrubber() ? Color::Black : Color::MidGray);
|
|
|
|
if (has_scrubber())
|
|
StylePainter::paint_button(painter, scrubber_rect(), ButtonStyle::Normal, false, m_hovered_component == Component::Scrubber);
|
|
}
|
|
|
|
void GScrollBar::mousedown_event(GMouseEvent& event)
|
|
{
|
|
if (event.button() != GMouseButton::Left)
|
|
return;
|
|
if (up_button_rect().contains(event.position())) {
|
|
set_value(value() - m_step);
|
|
return;
|
|
}
|
|
if (down_button_rect().contains(event.position())) {
|
|
set_value(value() + m_step);
|
|
return;
|
|
}
|
|
#ifdef GUTTER_DOES_PAGEUP_PAGEDOWN
|
|
if (has_scrubber() && upper_gutter_rect().contains(event.position())) {
|
|
set_value(value() - m_big_step);
|
|
return;
|
|
}
|
|
if (has_scrubber() && lower_gutter_rect().contains(event.position())) {
|
|
set_value(value() + m_big_step);
|
|
return;
|
|
}
|
|
#endif
|
|
if (has_scrubber() && scrubber_rect().contains(event.position())) {
|
|
m_scrubbing = true;
|
|
m_scrub_start_value = value();
|
|
m_scrub_origin = event.position();
|
|
update();
|
|
return;
|
|
}
|
|
#ifndef GUTTER_DOES_PAGEUP_PAGEDOWN
|
|
if (has_scrubber()) {
|
|
float range_size = m_max - m_min;
|
|
float available = scrubbable_range_in_pixels();
|
|
|
|
float x = ::max(0, event.position().x() - button_width() - button_width() / 2);
|
|
float y = ::max(0, event.position().y() - button_height() - button_height() / 2);
|
|
|
|
float rel_x = x / available;
|
|
float rel_y = y / available;
|
|
|
|
if (orientation() == Orientation::Vertical)
|
|
set_value(m_min + rel_y * range_size);
|
|
else
|
|
set_value(m_min + rel_x * range_size);
|
|
|
|
m_scrubbing = true;
|
|
m_scrub_start_value = value();
|
|
m_scrub_origin = event.position();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void GScrollBar::mouseup_event(GMouseEvent& event)
|
|
{
|
|
if (event.button() != GMouseButton::Left)
|
|
return;
|
|
if (!m_scrubbing)
|
|
return;
|
|
m_scrubbing = false;
|
|
update();
|
|
}
|
|
|
|
void GScrollBar::mousemove_event(GMouseEvent& event)
|
|
{
|
|
auto old_hovered_component = m_hovered_component;
|
|
if (scrubber_rect().contains(event.position()))
|
|
m_hovered_component = Component::Scrubber;
|
|
else if (up_button_rect().contains(event.position()))
|
|
m_hovered_component = Component::DecrementButton;
|
|
else if (down_button_rect().contains(event.position()))
|
|
m_hovered_component = Component::IncrementButton;
|
|
else if (rect().contains(event.position()))
|
|
m_hovered_component = Component::Gutter;
|
|
else
|
|
m_hovered_component = Component::Invalid;
|
|
if (old_hovered_component != m_hovered_component)
|
|
update();
|
|
if (!m_scrubbing)
|
|
return;
|
|
float delta = orientation() == Orientation::Vertical ? (event.y() - m_scrub_origin.y()) : (event.x() - m_scrub_origin.x());
|
|
float scrubbable_range = scrubbable_range_in_pixels();
|
|
float value_steps_per_scrubbed_pixel = (m_max - m_min) / scrubbable_range;
|
|
float new_value = m_scrub_start_value + (value_steps_per_scrubbed_pixel * delta);
|
|
set_value(new_value);
|
|
}
|
|
|
|
void GScrollBar::leave_event(CEvent&)
|
|
{
|
|
if (m_hovered_component != Component::Invalid) {
|
|
m_hovered_component = Component::Invalid;
|
|
update();
|
|
}
|
|
}
|