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#include <LibGUI/GTableView.h>
#include <LibGUI/GTableModel.h>
#include <LibGUI/GScrollBar.h>
#include <SharedGraphics/Painter.h>
#include <Kernel/KeyCode.h>
GTableView::GTableView(GWidget* parent)
: GWidget(parent)
{
set_fill_with_background_color(false);
m_vertical_scrollbar = new GScrollBar(Orientation::Vertical, this);
m_vertical_scrollbar->set_step(4);
m_vertical_scrollbar->on_change = [this] (int) {
update();
};
m_horizontal_scrollbar = new GScrollBar(Orientation::Horizontal, this);
m_horizontal_scrollbar->set_step(4);
m_horizontal_scrollbar->set_big_step(30);
m_horizontal_scrollbar->on_change = [this] (int) {
update();
};
}
GTableView::~GTableView()
{
}
void GTableView::set_model(OwnPtr<GTableModel>&& model)
{
if (model.ptr() == m_model.ptr())
return;
if (m_model)
m_model->unregister_view(Badge<GTableView>(), *this);
m_model = move(model);
if (m_model)
m_model->register_view(Badge<GTableView>(), *this);
}
void GTableView::resize_event(GResizeEvent& event)
{
update_scrollbar_ranges();
m_vertical_scrollbar->set_relative_rect(event.size().width() - m_vertical_scrollbar->preferred_size().width(), 0, m_vertical_scrollbar->preferred_size().width(), event.size().height() - m_horizontal_scrollbar->preferred_size().height());
m_horizontal_scrollbar->set_relative_rect(0, event.size().height() - m_horizontal_scrollbar->preferred_size().height(), event.size().width() - m_vertical_scrollbar->preferred_size().width(), m_horizontal_scrollbar->preferred_size().height());
}
void GTableView::update_scrollbar_ranges()
{
int available_height = height() - header_height() - m_horizontal_scrollbar->height();
int excess_height = max(0, (item_count() * item_height()) - available_height);
m_vertical_scrollbar->set_range(0, excess_height);
int available_width = width() - m_vertical_scrollbar->width();
int excess_width = max(0, content_width() - available_width);
m_horizontal_scrollbar->set_range(0, excess_width);
m_vertical_scrollbar->set_big_step(visible_content_rect().height() - item_height());
}
int GTableView::content_width() const
{
if (!m_model)
return 0;
int width = 0;
int column_count = m_model->column_count();
for (int i = 0; i < column_count; ++i)
width += m_model->column_metadata(i).preferred_width + horizontal_padding() * 2;
return width;
}
void GTableView::model_notification(const GModelNotification&)
{
}
void GTableView::did_update_model()
{
update_scrollbar_ranges();
update();
model_notification(GModelNotification(GModelNotification::ModelUpdated));
}
Rect GTableView::row_rect(int item_index) const
{
return { 0, header_height() + (item_index * item_height()), max(content_width(), width()), item_height() };
}
void GTableView::mousedown_event(GMouseEvent& event)
{
auto adjusted_position = event.position().translated(0, m_vertical_scrollbar->value());
if (event.button() == GMouseButton::Left) {
for (int i = 0; i < item_count(); ++i) {
if (row_rect(i).contains(adjusted_position)) {
m_model->set_selected_index({ i, 0 });
update();
return;
}
}
}
m_model->set_selected_index({ });
update();
}
void GTableView::paint_event(GPaintEvent& event)
{
Painter painter(*this);
painter.set_clip_rect(event.rect());
painter.translate(-m_horizontal_scrollbar->value(), -m_vertical_scrollbar->value());
int exposed_width = max(content_width(), width());
int painted_item_index = 0;
int y_offset = header_height();
for (int row_index = 0; row_index < m_model->row_count(); ++row_index) {
int y = y_offset + painted_item_index * item_height();
Color background_color;
Color text_color;
if (row_index == m_model->selected_index().row()) {
background_color = Color::from_rgb(0x84351a);
text_color = Color::White;
} else {
background_color = painted_item_index % 2 ? Color(210, 210, 210) : Color::White;
text_color = Color::Black;
}
painter.fill_rect(row_rect(painted_item_index), background_color);
int x_offset = 0;
for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
auto column_metadata = m_model->column_metadata(column_index);
int column_width = column_metadata.preferred_width;
Rect cell_rect(horizontal_padding() + x_offset, y, column_width, item_height());
auto data = m_model->data(row_index, column_index);
if (data.is_bitmap())
painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
else
painter.draw_text(cell_rect, data.to_string(), column_metadata.text_alignment, text_color);
x_offset += column_width + horizontal_padding() * 2;
}
++painted_item_index;
};
Rect unpainted_rect(0, header_height() + painted_item_index * item_height(), exposed_width, height());
painter.fill_rect(unpainted_rect, Color::White);
// Untranslate the painter and paint the column headers.
painter.translate(0, m_vertical_scrollbar->value());
painter.fill_rect({ 0, 0, exposed_width, header_height() }, Color::LightGray);
int x_offset = 0;
for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
auto column_metadata = m_model->column_metadata(column_index);
int column_width = column_metadata.preferred_width;
Rect cell_rect(x_offset, 0, column_width + horizontal_padding() * 2, item_height());
painter.set_font(Font::default_bold_font());
painter.draw_text(cell_rect.translated(horizontal_padding(), 0), m_model->column_name(column_index), TextAlignment::CenterLeft, Color::Black);
x_offset += column_width + horizontal_padding() * 2;
painter.draw_line(cell_rect.top_left(), cell_rect.bottom_left(), Color::White);
painter.draw_line(cell_rect.top_right(), cell_rect.bottom_right(), Color::DarkGray);
}
painter.draw_line({ 0, 0 }, { exposed_width - 1, 0 }, Color::White);
painter.draw_line({ 0, header_height() - 1 }, { exposed_width - 1, header_height() - 1 }, Color::DarkGray);
// Then untranslate and fill in the scroll corner. This is pretty messy, tbh.
painter.translate(m_horizontal_scrollbar->value(), 0);
painter.fill_rect({ m_horizontal_scrollbar->relative_rect().top_right().translated(1, 0), { m_vertical_scrollbar->preferred_size().width(), m_horizontal_scrollbar->preferred_size().height() } }, Color::LightGray);
}
int GTableView::item_count() const
{
return m_model->row_count();
}
void GTableView::keydown_event(GKeyEvent& event)
{
if (!model())
return;
auto& model = *this->model();
if (event.key() == KeyCode::Key_Return) {
model.activate(model.selected_index());
return;
}
if (event.key() == KeyCode::Key_Up) {
GModelIndex new_index(model.selected_index().row() - 1, model.selected_index().column());
if (model.is_valid(new_index)) {
model.set_selected_index(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
return;
}
if (event.key() == KeyCode::Key_Down) {
GModelIndex new_index(model.selected_index().row() + 1, model.selected_index().column());
if (model.is_valid(new_index)) {
model.set_selected_index(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
return;
}
if (event.key() == KeyCode::Key_PageUp) {
int items_per_page = visible_content_rect().height() / item_height();
GModelIndex new_index(max(0, model.selected_index().row() - items_per_page), model.selected_index().column());
if (model.is_valid(new_index)) {
model.set_selected_index(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
return;
}
if (event.key() == KeyCode::Key_PageDown) {
int items_per_page = visible_content_rect().height() / item_height();
GModelIndex new_index(min(model.row_count() - 1, model.selected_index().row() + items_per_page), model.selected_index().column());
if (model.is_valid(new_index)) {
model.set_selected_index(new_index);
scroll_into_view(new_index, Orientation::Vertical);
update();
}
return;
}
return GWidget::keydown_event(event);
}
Rect GTableView::visible_content_rect() const
{
return {
m_horizontal_scrollbar->value(),
m_vertical_scrollbar->value(),
width() - m_vertical_scrollbar->width(),
height() - header_height() - m_horizontal_scrollbar->height()
};
}
void GTableView::scroll_into_view(const GModelIndex& index, Orientation orientation)
{
auto visible_content_rect = this->visible_content_rect();
auto rect = row_rect(index.row()).translated(0, -header_height());
if (visible_content_rect.contains(rect))
return;
if (orientation == Orientation::Vertical) {
if (rect.top() < visible_content_rect.top())
m_vertical_scrollbar->set_value(rect.top());
else if (rect.bottom() > visible_content_rect.bottom())
m_vertical_scrollbar->set_value(rect.bottom() - visible_content_rect.height());
} else {
if (rect.left() < visible_content_rect.left())
m_horizontal_scrollbar->set_value(rect.left());
else if (rect.right() > visible_content_rect.right())
m_horizontal_scrollbar->set_value(rect.right() - visible_content_rect.width());
}
}
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