blob: 3266e5526d403643eae0ca5861e35ee3ad889d2d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
#include "GraphWidget.h"
#include <LibGUI/GPainter.h>
GraphWidget::GraphWidget(GWidget* parent)
: GFrame(parent)
{
set_frame_thickness(2);
set_frame_shape(FrameShape::Container);
set_frame_shadow(FrameShadow::Sunken);
}
GraphWidget::~GraphWidget()
{
}
void GraphWidget::add_value(int value)
{
m_values.enqueue(value);
update();
}
void GraphWidget::paint_event(GPaintEvent& event)
{
GFrame::paint_event(event);
GPainter painter(*this);
painter.add_clip_rect(event.rect());
painter.add_clip_rect(frame_inner_rect());
painter.fill_rect(event.rect(), Color::Black);
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 * 2) + 1;
if (x < 0)
break;
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) {
Rect text_rect = inner_rect.shrunken(8, 8);
text_rect.set_height(font().glyph_height());
auto text = text_formatter(m_values.last(), m_max);
painter.draw_text(text_rect.translated(1, 1), text.characters(), TextAlignment::CenterRight, Color::Black);
painter.draw_text(text_rect, text.characters(), TextAlignment::CenterRight, m_text_color);
}
}
|
