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Make scrollbar movable with mouse, limit filechooser content to inside of file item

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dec05eba
2024-09-11 00:54:57 +02:00
parent 747344b858
commit dd906c6a9d
8 changed files with 104 additions and 43 deletions
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53
src/gui/ScrollablePage.cpp
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@@ -5,11 +5,13 @@
#include <mglpp/window/Window.hpp>
#include <mglpp/window/Event.hpp>
#include <mglpp/graphics/Rectangle.hpp>
#include <mglpp/system/FloatRect.hpp>
namespace gsr {
static const int scroll_speed = 80;
static const double scroll_update_speed = 10.0;
static const float scrollbar_width_scale = 0.004f;
static const float scrollbar_spacing_scale = 0.004f;
ScrollablePage::ScrollablePage(mgl::vec2f size) : size(size) {}
@@ -20,6 +22,12 @@ namespace gsr {
offset = position + offset + mgl::vec2f(0.0f, scroll_y);
Widget *selected_widget = selected_child_widget;
if(event.type == mgl::Event::MouseButtonReleased && moving_scrollbar_with_cursor) {
moving_scrollbar_with_cursor = false;
remove_widget_as_selected_in_parent();
return false;
}
if(selected_widget) {
if(!selected_widget->on_event(event, window, offset))
return false;
@@ -43,16 +51,26 @@ namespace gsr {
return false;
}
if(event.type == mgl::Event::MouseButtonPressed && scrollbar_rect.contains(mgl::vec2f(event.mouse_button.x, event.mouse_button.y))) {
set_widget_as_selected_in_parent();
moving_scrollbar_with_cursor = true;
scrollbar_move_cursor_start_pos = mgl::vec2f(event.mouse_button.x, event.mouse_button.y);
scrollbar_move_cursor_scroll_y_start = scroll_y;
return false;
}
return true;
}
void ScrollablePage::draw(mgl::Window &window, mgl::vec2f offset) {
scrollbar_rect = mgl::FloatRect();
if(!visible || widgets.empty()) {
reset_scroll();
return;
}
const double scrollbar_width = std::max(5.0f, scrollbar_width_scale * get_theme().window_height);
const double scrollbar_width = get_scrollbar_width();
const mgl::vec2f scrollbar_pos = position + offset + mgl::vec2f(size.x - scrollbar_width, 0.0f);
offset = position + offset;
@@ -140,6 +158,9 @@ namespace gsr {
if(scrollbar_height > 1.0)
scrollbar_height = 1.0;
const double scrollbar_height_absolute = std::max(10.0, size.y * scrollbar_height);
const double scrollbar_empty_space = size.y - scrollbar_height_absolute;
if(scrollbar_height < 0.999) {
double scroll_amount = -scroll_y / (child_height - size.y);
if(scroll_amount < 0.0)
@@ -147,14 +168,26 @@ namespace gsr {
else if(scroll_amount > 1.0)
scroll_amount = 1.0;
const double scrollbar_height_absolute = size.y * scrollbar_height;
const double scrollbar_empty_space = size.y - scrollbar_height_absolute;
mgl::Rectangle scrollbar(
(scrollbar_pos + mgl::vec2f(0.0f, scroll_amount * scrollbar_empty_space)).floor(),
mgl::vec2f(scrollbar_width, scrollbar_height_absolute).floor());
scrollbar.set_color(mgl::Color(200, 200, 200));
window.draw(scrollbar);
scrollbar_rect.position = scrollbar.get_position();
scrollbar_rect.size = scrollbar.get_size();
}
if(moving_scrollbar_with_cursor) {
const double scroll_bottom_limit = child_height - size.y;
const mgl::vec2f scrollbar_move_diff = window.get_mouse_position().to_vec2f() - scrollbar_move_cursor_start_pos;
const double scroll_amount = scrollbar_move_diff.y / scrollbar_empty_space;
scroll_y = scrollbar_move_cursor_scroll_y_start - scroll_amount * (child_height - size.y);
if(scroll_y > 0.0)
scroll_y = 0.0;
else if(scroll_y < -scroll_bottom_limit)
scroll_y = -scroll_bottom_limit;
scroll_target_y = scroll_y;
}
}
@@ -165,6 +198,14 @@ namespace gsr {
return size;
}
mgl::vec2f ScrollablePage::get_inner_size() {
if(!visible)
return {0.0f, 0.0f};
const float scrollbar_spacing = std::max(2.0f, scrollbar_spacing_scale * get_theme().window_height);
return size - mgl::vec2f(get_scrollbar_width() + scrollbar_spacing, 0.0f);
}
void ScrollablePage::set_size(mgl::vec2f size) {
this->size = size;
}
@@ -178,4 +219,8 @@ namespace gsr {
scroll_y = 0;
scroll_target_y = 0;
}
float ScrollablePage::get_scrollbar_width() const {
return std::max(5.0f, scrollbar_width_scale * get_theme().window_height);
}
}