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LibGUI: Take ProcessManager's process view and turn it into GTableView.

Make it sufficiently generic that it can be reused for any table data. :^)
This commit is contained in:
Andreas Kling 2019-02-28 10:57:09 +01:00
parent b3ae1163ef
commit dc9f8a9361
11 changed files with 173 additions and 88 deletions

View file

@ -1,6 +1,6 @@
OBJS = \
ProcessTableModel.o \
ProcessView.o \
ProcessTableView.o \
main.o
APP = ProcessManager

View file

@ -141,6 +141,8 @@ void ProcessTableModel::update()
}
for (auto pid : pids_to_remove)
m_processes.remove(pid);
did_update();
}
pid_t ProcessTableModel::selected_pid() const

View file

@ -0,0 +1,35 @@
#include "ProcessTableView.h"
#include "ProcessTableModel.h"
ProcessTableView::ProcessTableView(GWidget* parent)
: GTableView(parent)
{
set_model(make<ProcessTableModel>());
start_timer(1000);
model().update();
}
ProcessTableView::~ProcessTableView()
{
}
void ProcessTableView::timer_event(GTimerEvent&)
{
model().update();
}
pid_t ProcessTableView::selected_pid() const
{
return model().selected_pid();
}
inline ProcessTableModel& ProcessTableView::model()
{
return static_cast<ProcessTableModel&>(*GTableView::model());
}
inline const ProcessTableModel& ProcessTableView::model() const
{
return static_cast<const ProcessTableModel&>(*GTableView::model());
}

View file

@ -0,0 +1,24 @@
#pragma once
#include <LibGUI/GTableView.h>
#include <AK/Function.h>
#include <unistd.h>
class ProcessTableModel;
class ProcessTableView final : public GTableView {
public:
explicit ProcessTableView(GWidget* parent);
virtual ~ProcessTableView() override;
pid_t selected_pid() const;
Function<void(String)> on_status_message;
private:
virtual void timer_event(GTimerEvent&) override;
ProcessTableModel& model();
const ProcessTableModel& model() const;
};

View file

@ -1,141 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <AK/FileSystemPath.h>
#include <AK/HashMap.h>
#include <SharedGraphics/GraphicsBitmap.h>
#include <SharedGraphics/Painter.h>
#include <LibGUI/GScrollBar.h>
#include "ProcessTableModel.h"
#include "ProcessView.h"
static HashMap<unsigned, String>* s_usernames;
ProcessView::ProcessView(GWidget* parent)
: GWidget(parent)
{
m_process_icon = GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/gear16.rgb", { 16, 16 });
m_scrollbar = new GScrollBar(Orientation::Vertical, this);
m_scrollbar->set_step(4);
m_scrollbar->set_big_step(30);
m_scrollbar->on_change = [this] (int) {
update();
};
m_model = make<ProcessTableModel>();
start_timer(1000);
reload();
}
ProcessView::~ProcessView()
{
}
void ProcessView::timer_event(GTimerEvent&)
{
reload();
}
void ProcessView::resize_event(GResizeEvent& event)
{
m_scrollbar->set_relative_rect(event.size().width() - m_scrollbar->preferred_size().width(), 0, m_scrollbar->preferred_size().width(), event.size().height());
}
void ProcessView::reload()
{
m_model->update();
int excess_height = max(0, (item_count() * item_height()) - height());
m_scrollbar->set_range(0, excess_height);
set_status_message(String::format("%d processes", item_count()));
update();
}
Rect ProcessView::row_rect(int item_index) const
{
return { 0, header_height() + (item_index * item_height()), width(), item_height() };
}
void ProcessView::mousedown_event(GMouseEvent& event)
{
auto adjusted_position = event.position().translated(0, m_scrollbar->value());
if (event.button() == GMouseButton::Left) {
for (int i = 0; i < item_count(); ++i) {
if (!row_rect(i).contains(adjusted_position))
continue;
m_model->set_selected_index({ i, 0 });
update();
}
}
}
void ProcessView::paint_event(GPaintEvent&)
{
Painter painter(*this);
painter.translate(0, -m_scrollbar->value());
int horizontal_padding = 5;
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) {
Rect cell_rect(horizontal_padding + x_offset, y, m_model->column_width(column_index), item_height());
painter.draw_text(cell_rect, m_model->data(row_index, column_index), TextAlignment::CenterLeft, text_color);
x_offset += m_model->column_width(column_index) + horizontal_padding;
}
++painted_item_index;
};
Rect unpainted_rect(0, painted_item_index * item_height(), width(), height());
unpainted_rect.intersect(rect());
painter.fill_rect(unpainted_rect, Color::White);
// Untranslate the painter and paint the column headers.
painter.translate(0, m_scrollbar->value());
painter.fill_rect({ 0, 0, width(), header_height() }, Color::LightGray);
int x_offset = 0;
for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
Rect cell_rect(horizontal_padding + x_offset, 0, m_model->column_width(column_index), item_height());
painter.draw_text(cell_rect, m_model->column_name(column_index), TextAlignment::CenterLeft, Color::Black);
x_offset += m_model->column_width(column_index) + horizontal_padding;
}
painter.draw_line({ 0, 0 }, { width() - 1, 0 }, Color::White);
painter.draw_line({ 0, header_height() - 1 }, { width() - 1, header_height() - 1 }, Color::DarkGray);
}
void ProcessView::set_status_message(String&& message)
{
if (on_status_message)
on_status_message(move(message));
}
int ProcessView::item_count() const
{
return m_model->row_count();
}
pid_t ProcessView::selected_pid() const
{
return m_model->selected_pid();
}

View file

@ -1,37 +0,0 @@
#pragma once
#include <LibGUI/GWidget.h>
#include <AK/Function.h>
#include <AK/HashMap.h>
class GScrollBar;
class ProcessTableModel;
class ProcessView final : public GWidget {
public:
ProcessView(GWidget* parent);
virtual ~ProcessView() override;
void reload();
Function<void(String)> on_status_message;
int header_height() const { return 16; }
int item_height() const { return 16; }
int item_count() const;
pid_t selected_pid() const;
private:
virtual void paint_event(GPaintEvent&) override;
virtual void resize_event(GResizeEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void timer_event(GTimerEvent&) override;
void set_status_message(String&&);
Rect row_rect(int item_index) const;
RetainPtr<GraphicsBitmap> m_process_icon;
GScrollBar* m_scrollbar { nullptr };
OwnPtr<ProcessTableModel> m_model;
};

View file

@ -9,7 +9,7 @@
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include "ProcessView.h"
#include "ProcessTableView.h"
int main(int argc, char** argv)
{
@ -19,14 +19,14 @@ int main(int argc, char** argv)
widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
auto* toolbar = new GToolBar(widget);
auto* process_view = new ProcessView(widget);
auto* process_table_view = new ProcessTableView(widget);
auto* statusbar = new GStatusBar(widget);
process_view->on_status_message = [statusbar] (String message) {
process_table_view->on_status_message = [statusbar] (String message) {
statusbar->set_text(move(message));
};
auto kill_action = GAction::create("Kill process", GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/kill16.rgb", { 16, 16 }), [process_view] (const GAction&) {
pid_t pid = process_view->selected_pid();
auto kill_action = GAction::create("Kill process", GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/kill16.rgb", { 16, 16 }), [process_table_view] (const GAction&) {
pid_t pid = process_table_view->selected_pid();
if (pid != -1)
kill(pid, SIGKILL);
});