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WindowServer: Choose resizing direction based on where it's initiated.

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Divide the window into 3x3 hot areas and resize in the direction of the
corner where the resize starts. The middle is a no-op area.

This needs some polish but the basic mechanism is good.
This commit is contained in:
Andreas Kling 2019-02-21 11:06:37 +01:00
parent 16cd4585cd
commit b6115ee5b7
Notes: sideshowbarker 2024-07-19 15:39:16 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b6115ee5b7a
1 changed files with 69 additions and 4 deletions
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73
WindowServer/WSWindowManager.cpp
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@ -492,6 +492,20 @@ void WSWindowManager::handle_close_button_mouse_event(WSWindow& window, WSMouseE
void WSWindowManager::start_window_resize(WSWindow& window, WSMouseEvent& event)
{
constexpr ResizeDirection direction_for_hot_area[3][3] = {
{ ResizeDirection::UpLeft, ResizeDirection::Up, ResizeDirection::UpRight },
{ ResizeDirection::Left, ResizeDirection::None, ResizeDirection::Right },
{ ResizeDirection::DownLeft, ResizeDirection::Down, ResizeDirection::DownRight },
};
Rect window_rect = window.rect();
int window_relative_x = event.x() - window_rect.x();
int window_relative_y = event.y() - window_rect.y();
int hot_area_row = window_relative_y / (window_rect.height() / 3);
int hot_area_column = window_relative_x / (window_rect.width() / 3);
m_resize_direction = direction_for_hot_area[hot_area_row][hot_area_column];
if (m_resize_direction == ResizeDirection::None)
return;
#ifdef RESIZE_DEBUG
printf("[WM] Begin resizing WSWindow{%p}\n", &window);
#endif
@ -499,6 +513,7 @@ void WSWindowManager::start_window_resize(WSWindow& window, WSMouseEvent& event)
m_resize_origin = event.position();
m_resize_window_original_rect = window.rect();
m_resize_window->set_has_painted_since_last_resize(true);
invalidate(window);
}
@ -543,11 +558,61 @@ void WSWindowManager::process_mouse_event(WSMouseEvent& event, WSWindow*& event_
if (event.type() == WSMessage::MouseMove) {
auto old_rect = m_resize_window->rect();
int dx = event.x() - m_resize_origin.x();
int dy = event.y() - m_resize_origin.y();
int diff_x = event.x() - m_resize_origin.x();
int diff_y = event.y() - m_resize_origin.y();
int change_x = 0;
int change_y = 0;
int change_w = 0;
int change_h = 0;
switch (m_resize_direction) {
case ResizeDirection::DownRight:
change_w = diff_x;
change_h = diff_y;
break;
case ResizeDirection::Right:
change_w = diff_x;
break;
case ResizeDirection::UpRight:
change_w = diff_x;
change_y = diff_y;
change_h = -diff_y;
break;
case ResizeDirection::Up:
change_y = diff_y;
change_h = -diff_y;
break;
case ResizeDirection::UpLeft:
change_x = diff_x;
change_w = -diff_x;
change_y = diff_y;
change_h = -diff_y;
break;
case ResizeDirection::Left:
change_x = diff_x;
change_w = -diff_x;
break;
case ResizeDirection::DownLeft:
change_x = diff_x;
change_w = -diff_x;
change_h = diff_y;
break;
case ResizeDirection::Down:
change_h = diff_y;
break;
default:
ASSERT_NOT_REACHED();
}
auto new_rect = m_resize_window_original_rect;
new_rect.set_width(max(50, new_rect.width() + dx));
new_rect.set_height(max(50, new_rect.height() + dy));
Size minimum_size { 50, 50 };
new_rect.set_x(new_rect.x() + change_x);
new_rect.set_y(new_rect.y() + change_y);
new_rect.set_width(max(minimum_size.width(), new_rect.width() + change_w));
new_rect.set_height(max(minimum_size.height(), new_rect.height() + change_h));
if (!m_resize_window->size_increment().is_null()) {
int horizontal_incs = (new_rect.width() - m_resize_window->base_size().width()) / m_resize_window->size_increment().width();