ProcessManager: Draw the graphs as lines.

This looks pretty neat. Also it exercises the diagonal line drawing code
so we get 2-for-1. :^)

2 files changed, 9 insertions, 4 deletions

diff --git a/Applications/ProcessManager/GraphWidget.cpp b/Applications/ProcessManager/GraphWidget.cpp
index a854137e77..3266e5526d 100644
--- a/Applications/ProcessManager/GraphWidget.cpp
+++ b/Applications/ProcessManager/GraphWidget.cpp
@@ -30,12 +30,16 @@ void GraphWidget::paint_event(GPaintEvent& event)
     auto inner_rect = frame_inner_rect();
     float scale = (float)inner_rect.height() / (float)m_max;
 
+    Point prev_point;
     for (int i = 0; i < m_values.size(); ++i) {
-        int x = inner_rect.right() - i + 1;
+        int x = inner_rect.right() - (i * 2) + 1;
         if (x < 0)
             break;
-        float scaled_value = (float)m_values.at(m_values.size() - i) * scale;
-        painter.draw_line({ x, inner_rect.bottom() }, { x, inner_rect.bottom() - (int)scaled_value }, m_graph_color);
+        float scaled_value = (float)m_values.at(m_values.size() - i - 1) * scale;
+        Point point = { x, inner_rect.bottom() - (int)scaled_value };
+        if (i != 0)
+            painter.draw_line(prev_point, point, m_graph_color);
+        prev_point = point;
     }
 
     if (!m_values.is_empty() && text_formatter) {
diff --git a/Applications/ProcessManager/main.cpp b/Applications/ProcessManager/main.cpp
index 1d243b9467..6c1b1e7caa 100644
--- a/Applications/ProcessManager/main.cpp
+++ b/Applications/ProcessManager/main.cpp
@@ -54,7 +54,6 @@ int main(int argc, char** argv)
     auto* memory_graph_group_box = new GGroupBox("Memory usage", graphs_container);
     memory_graph_group_box->set_layout(make<GBoxLayout>(Orientation::Vertical));
     memory_graph_group_box->layout()->set_margins({ 6, 16, 6, 6 });
-    tabwidget->add_widget("Graphs", graphs_container);
     memory_graph_group_box->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     memory_graph_group_box->set_preferred_size({ 0, 120 });
     auto* memory_graph = new GraphWidget(memory_graph_group_box);
@@ -64,6 +63,8 @@ int main(int argc, char** argv)
         return String::format("%d / %d KB", value, max);
     };
 
+    tabwidget->add_widget("Graphs", graphs_container);
+
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
 
     auto* toolbar = new GToolBar(widget);