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GTableView: Make it possible to resize the columns with the mouse.

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The GModel now merely provides an initial width for the columns. Once that
has been queried, the table view manages width from then on.
This commit is contained in:
Andreas Kling 2019-05-04 23:45:31 +02:00
parent f3aec1a0d9
commit 48e3ea9e5c
2 changed files with 101 additions and 22 deletions
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105
LibGUI/GTableView.cpp
View file

@ -3,6 +3,7 @@
#include <LibGUI/GScrollBar.h>
#include <LibGUI/GPainter.h>
#include <LibGUI/GTextBox.h>
#include <LibGUI/GWindow.h>
#include <Kernel/KeyCode.h>
#include <AK/StringBuilder.h>
@ -26,7 +27,7 @@ void GTableView::update_content_size()
int content_width = 0;
int column_count = model()->column_count();
for (int i = 0; i < column_count; ++i)
content_width += model()->column_metadata(i).preferred_width + horizontal_padding() * 2;
content_width += column_width(i) + horizontal_padding() * 2;
int content_height = item_count() * item_height();
set_content_size({ content_width, content_height });
@ -62,7 +63,12 @@ Rect GTableView::row_rect(int item_index) const
int GTableView::column_width(int column_index) const
{
return model()->column_metadata(column_index).preferred_width;
auto& column_data = this->column_data(column_index);
if (!column_data.has_initialized_width) {
column_data.has_initialized_width = true;
column_data.width = model()->column_metadata(column_index).preferred_width;
}
return column_data.width;
}
Rect GTableView::header_rect(int column_index) const
@ -75,9 +81,7 @@ Rect GTableView::header_rect(int column_index) const
continue;
x_offset += column_width(i) + horizontal_padding() * 2;
}
auto column_metadata = model()->column_metadata(column_index);
int column_width = column_metadata.preferred_width;
return { x_offset, 0, column_width + horizontal_padding() * 2, header_height() };
return { x_offset, 0, column_width(column_index) + horizontal_padding() * 2, header_height() };
}
Point GTableView::adjusted_position(const Point& position)
@ -85,14 +89,31 @@ Point GTableView::adjusted_position(const Point& position)
return position.translated(-frame_thickness(), vertical_scrollbar().value() - frame_thickness());
}
Rect GTableView::column_resize_grabbable_rect(int column) const
{
auto header_rect = this->header_rect(column);
return { header_rect.right() - 1, header_rect.top(), 4, header_rect.height() };
}
void GTableView::mousedown_event(GMouseEvent& event)
{
if (!model())
return;
auto adjusted_position = this->adjusted_position(event.position());
if (event.y() < header_height()) {
auto adjusted_position = this->adjusted_position(event.position());
for (int i = 0; i < model()->column_count(); ++i) {
if (event.button() == GMouseButton::Left) {
if (column_resize_grabbable_rect(i).contains(adjusted_position)) {
dbgprintf("now resizing column %d\n", i);
m_resizing_column = i;
m_in_column_resize = true;
m_column_resize_original_width = column_width(i);
m_column_resize_origin = event.position();
return;
}
}
auto header_rect = this->header_rect(i);
if (header_rect.contains(adjusted_position)) {
auto new_sort_order = GSortOrder::Ascending;
@ -108,7 +129,6 @@ void GTableView::mousedown_event(GMouseEvent& event)
}
if (event.button() == GMouseButton::Left) {
auto adjusted_position = this->adjusted_position(event.position());
for (int row = 0, row_count = model()->row_count(); row < row_count; ++row) {
if (!row_rect(row).contains(adjusted_position))
continue;
@ -125,6 +145,41 @@ void GTableView::mousedown_event(GMouseEvent& event)
}
}
void GTableView::mousemove_event(GMouseEvent& event)
{
if (m_in_column_resize) {
auto delta = event.position() - m_column_resize_origin;
int new_width = m_column_resize_original_width + delta.x();
auto& column_data = this->column_data(m_resizing_column);
if (column_data.width != new_width) {
column_data.width = new_width;
update();
}
return;
}
auto adjusted_position = this->adjusted_position(event.position());
if (event.buttons() == 0) {
for (int i = 0; i < model()->column_count(); ++i) {
if (column_resize_grabbable_rect(i).contains(adjusted_position)) {
window()->set_override_cursor(GStandardCursor::ResizeHorizontal);
return;
}
}
}
window()->set_override_cursor(GStandardCursor::None);
}
void GTableView::mouseup_event(GMouseEvent& event)
{
auto adjusted_position = this->adjusted_position(event.position());
if (event.button() == GMouseButton::Left) {
if (!column_resize_grabbable_rect(m_resizing_column).contains(adjusted_position))
window()->set_override_cursor(GStandardCursor::None);
m_in_column_resize = false;
}
}
void GTableView::paint_event(GPaintEvent& event)
{
GFrame::paint_event(event);
@ -167,7 +222,7 @@ void GTableView::paint_event(GPaintEvent& event)
if (is_column_hidden(column_index))
continue;
auto column_metadata = model()->column_metadata(column_index);
int column_width = column_metadata.preferred_width;
int column_width = this->column_width(column_index);
const Font& font = column_metadata.font ? *column_metadata.font : this->font();
bool is_key_column = model()->key_column() == column_index;
Rect cell_rect(horizontal_padding() + x_offset, y, column_width, item_height());
@ -214,8 +269,7 @@ void GTableView::paint_headers(Painter& painter)
for (int column_index = 0; column_index < model()->column_count(); ++column_index) {
if (is_column_hidden(column_index))
continue;
auto column_metadata = model()->column_metadata(column_index);
int column_width = column_metadata.preferred_width;
int column_width = this->column_width(column_index);
bool is_key_column = model()->key_column() == column_index;
Rect cell_rect(x_offset, 0, column_width + horizontal_padding() * 2, header_height());
StylePainter::paint_button(painter, cell_rect, ButtonStyle::Normal, false);
@ -309,23 +363,27 @@ void GTableView::scroll_into_view(const GModelIndex& index, Orientation orientat
GScrollableWidget::scroll_into_view(rect, orientation);
}
GTableView::ColumnData& GTableView::column_data(int column) const
{
ASSERT(model());
ASSERT(column >= 0 && column < model()->column_count());
if (column >= m_column_data.size())
m_column_data.resize(model()->column_count());
return m_column_data.at(column);
}
bool GTableView::is_column_hidden(int column) const
{
if (column >= 0 && column < m_column_visibility.size())
return !m_column_visibility[column];
return false;
return !column_data(column).visibility;
}
void GTableView::set_column_hidden(int column, bool hidden)
{
ASSERT(column >= 0);
if (m_column_visibility.size() <= column) {
int previous_column_count = m_column_visibility.size();
m_column_visibility.resize(column + 1);
for (int i = previous_column_count; i < m_column_visibility.size(); ++i)
m_column_visibility[i] = true;
}
m_column_visibility[column] = !hidden;
auto& column_data = this->column_data(column);
if (column_data.visibility == !hidden)
return;
column_data.visibility = !hidden;
update();
}
void GTableView::doubleclick_event(GMouseEvent& event)
@ -344,3 +402,8 @@ void GTableView::doubleclick_event(GMouseEvent& event)
}
}
}
void GTableView::leave_event(CEvent&)
{
window()->set_override_cursor(GStandardCursor::None);
}

18
LibGUI/GTableView.h
View file

@ -40,19 +40,35 @@ private:
virtual void did_update_model() override;
virtual void paint_event(GPaintEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void mousemove_event(GMouseEvent&) override;
virtual void mouseup_event(GMouseEvent&) override;
virtual void doubleclick_event(GMouseEvent&) override;
virtual void keydown_event(GKeyEvent&) override;
virtual void leave_event(CEvent&) override;
Rect content_rect(int row, int column) const;
void paint_headers(Painter&);
int item_count() const;
Rect row_rect(int item_index) const;
Rect header_rect(int) const;
Rect column_resize_grabbable_rect(int) const;
int column_width(int) const;
void update_content_size();
Vector<bool> m_column_visibility;
struct ColumnData {
int width { 0 };
bool has_initialized_width { false };
bool visibility { true };
};
ColumnData& column_data(int column) const;
mutable Vector<ColumnData> m_column_data;
int m_horizontal_padding { 5 };
bool m_headers_visible { true };
bool m_alternating_row_colors { true };
bool m_in_column_resize { false };
Point m_column_resize_origin;
int m_column_resize_original_width { 0 };
int m_resizing_column { -1 };
};