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Code Issues Projects Releases Packages Wiki Activity Actions 7

More rage hacking on Widgets. Some very basic text drawing. :^)

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This commit is contained in:
Andreas Kling 2018-10-10 20:06:58 +02:00
parent 6f37429f57
commit 77bac7216c
Notes: sideshowbarker 2024-07-19 18:51:16 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/77bac7216cb
7 changed files with 341 additions and 28 deletions
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10
Widgets/Label.cpp
View file

@ -5,17 +5,25 @@
Label::Label(Widget* parent)
: Widget(parent)
{
setRect(Rect(100, 100, 100, 100));
}
Label::~Label()
{
}
void Label::setText(String&& text)
{
if (text == m_text)
return;
m_text = std::move(text);
update();
}
void Label::onPaint(PaintEvent&)
{
Painter painter(*this);
painter.fillRect({ 0, 0, width(), height() }, Color(0xc0, 0xc0, 0xc0));
painter.drawText({ 4, 4 }, text());
}
void Label::onMouseMove(MouseEvent& event)

6
Widgets/Label.h
View file

@ -1,16 +1,22 @@
#pragma once
#include "Widget.h"
#include <AK/String.h>
class Label final : public Widget {
public:
explicit Label(Widget* parent);
virtual ~Label() override;
String text() const { return m_text; }
void setText(String&&);
private:
virtual void onPaint(PaintEvent&) override;
virtual void onMouseMove(MouseEvent&) override;
virtual const char* className() const override { return "Label"; }
String m_text;
};

287
Widgets/Painter.cpp
View file

@ -15,16 +15,281 @@ Painter::~Painter()
ASSERT(rc == 0);
}
void Painter::fillRect(Rect rect, Color color)
static dword* scanline(int y)
{
rect.moveBy(m_widget.x(), m_widget.y());
SDL_Rect sdlRect;
sdlRect.x = rect.x();
sdlRect.y = rect.y();
sdlRect.w = rect.width();
sdlRect.h = rect.height();
int rc = SDL_FillRect(FrameBufferSDL::the().surface(), &sdlRect, color.value());
ASSERT(rc == 0);
auto& surface = *FrameBufferSDL::the().surface();
return (dword*)(((byte*)surface.pixels) + (y * surface.pitch));
}
void Painter::fillRect(const Rect& rect, Color color)
{
Rect r = rect;
r.moveBy(m_widget.x(), m_widget.y());
for (int y = r.top(); y < r.bottom(); ++y) {
dword* bits = scanline(y);
for (int x = r.left(); x < r.right(); ++x) {
bits[x] = color.value();
}
}
}
const char* peanut8x7[] {
" #### "
" # # "
" # # "
" ###### "
" # # "
" # # "
"### ###",
" ##### "
" # # "
" # # "
" ###### "
" # # "
" # # "
" ##### ",
" #### "
" # # "
" # "
" # "
" # "
" # # "
" #### ",
" ##### "
" # # "
" # # "
" # # "
" # # "
" # # "
" ##### ",
" ###### "
" # # "
" # "
" #### "
" # "
" # # "
" ###### ",
" ###### "
" # # "
" # "
" #### "
" # "
" # "
" # ",
" #### "
" # # "
" # "
" # ###"
" # # "
" # # "
" #### ",
" # # "
" # # "
" # # "
" ###### "
" # # "
" # # "
" # # ",
" ### "
" # "
" # "
" # "
" # "
" # "
" ### ",
" ##### "
" # # "
" # "
" # "
" # "
" # # "
" ### ",
" ### ###"
" # # "
" # # "
" ### "
" # # "
" # # "
" ### ###",
" ### "
" # "
" # "
" # "
" # "
" # # "
" ###### ",
" # # "
" ## ## "
" # ## # "
" # # "
" # # "
" # # "
"### ###",
" # # "
" ## # "
" # # # "
" # # # "
" # ## "
" # # "
" # # ",
" #### "
" # # "
" # # "
" # # "
" # # "
" # # "
" #### ",
" ##### "
" # # "
" # # "
" #### "
" # "
" # "
" ### ",
" #### "
" # # "
" # # "
" # # "
" # # # "
" # # "
" ### # ",
" ##### "
" # # "
" # # "
" #### "
" # # "
" # # "
" ### # ",
" #### "
" # # "
" # "
" #### "
" # "
" # # "
" #### ",
" ##### "
"# # # "
" # "
" # "
" # "
" # "
" ### ",
"### ###"
" # # "
" # # "
" # # "
" # # "
" # # "
" #### ",
"### ### "
" # # "
" # # "
" # # "
" # # "
" # "
" # ",
"### ###"
" # # "
" # # "
" # # "
" # ## # "
" ## ## "
" # # ",
"## ## "
" # # "
" # # "
" # "
" # # "
" # # "
"## ## ",
"## ## "
" # # "
" # # "
" # # "
" # "
" # "
" ### ",
" ###### "
" # # "
" # "
" # "
" # "
" # # "
" ###### ",
" #### "
" # "
" # "
" # "
" # "
" # "
" #### ",
" # "
" ## "
" ## "
" ## "
" ## "
" ## "
" # ",
" #### "
" # "
" # "
" # "
" # "
" # "
" #### ",
};
void Painter::drawText(const Point& point, const String& text, const Color& color)
{
Point p = point;
p.moveBy(m_widget.x(), m_widget.y());
byte fontWidth = 8;
byte fontHeight = 7;
auto* font = peanut8x7;
for (int row = 0; row < fontHeight; ++row) {
int y = p.y() + row;
dword* bits = scanline(y);
for (unsigned i = 0; i < text.length(); ++i) {
const char* fontCharacter = font[text[i] - 'A'];
int x = p.x() + i * fontWidth;
for (unsigned j = 0; j < fontWidth; ++j) {
char fc = fontCharacter[row * fontWidth + j];
if (fc == '#')
bits[x + j] = color.value();
}
}
}
}

5
Widgets/Painter.h
View file

@ -1,7 +1,9 @@
#pragma once
#include "Color.h"
#include "Point.h"
#include "Rect.h"
#include <AK/String.h>
class Widget;
@ -9,7 +11,8 @@ class Painter {
public:
explicit Painter(Widget&);
~Painter();
void fillRect(Rect, Color);
void fillRect(const Rect&, Color);
void drawText(const Point&, const String&, const Color& = Color());
private:
Widget& m_widget;

23
Widgets/Point.h Normal file
View file

@ -0,0 +1,23 @@
#pragma once
class Point {
public:
Point() { }
Point(int x, int y) : m_x(x) , m_y(y) { }
int x() const { return m_x; }
int y() const { return m_y; }
void setX(int x) { m_x = x; }
void setY(int y) { m_y = y; }
void moveBy(int dx, int dy)
{
m_x += dx;
m_y += dy;
}
private:
int m_x { 0 };
int m_y { 0 };
};

36
Widgets/Rect.h
View file

@ -1,11 +1,12 @@
#pragma once
#include "Point.h"
class Rect {
public:
Rect() { }
Rect(int x, int y, int width, int height)
: m_x(x)
, m_y(y)
: m_location(x, y)
, m_width(width)
, m_height(height)
{
@ -13,33 +14,38 @@ public:
void moveBy(int dx, int dy)
{
m_x += dx;
m_y += dy;
m_location.moveBy(dx, dy);
}
bool contains(int x, int y) const
{
return x >= m_x && x <= right() && y >= m_y && y <= bottom();
return x >= m_location.x() && x <= right() && y >= m_location.y() && y <= bottom();
}
int left() const { return m_x; }
int right() const { return m_x + m_width; }
int top() const { return m_y; }
int bottom() const { return m_y + m_height; }
bool contains(const Point& point) const
{
return contains(point.x(), point.y());
}
int x() const { return m_x; }
int y() const { return m_y; }
int left() const { return x(); }
int right() const { return x() + width(); }
int top() const { return y(); }
int bottom() const { return y() + height(); }
int x() const { return location().x(); }
int y() const { return location().y(); }
int width() const { return m_width; }
int height() const { return m_height; }
void setX(int x) { m_x = x; }
void setY(int y) { m_y = y; }
void setX(int x) { m_location.setX(x); }
void setY(int y) { m_location.setY(y); }
void setWidth(int width) { m_width = width; }
void setHeight(int height) { m_height = height; }
Point location() const { return m_location; }
private:
int m_x { 0 };
int m_y { 0 };
Point m_location;
int m_width { 0 };
int m_height { 0 };
};

2
Widgets/test.cpp
View file

@ -15,6 +15,8 @@ int main(int c, char** v)
fb.setRootWidget(&w);
Label l(&w);
l.setRect(Rect(100, 100, 300, 100));
l.setText("ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]");
return loop.exec();
}