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EyeDropper.cpp
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EyeDropper.cpp
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// Vaca - Visual Application Components Abstraction
// Copyright (c) 2005-2009 David Capello
//
// This file is distributed under the terms of the MIT license,
// please read LICENSE.txt for more information.
#include <vaca/vaca.h>
#include "resource.h"
using namespace vaca;
// the eye-dropper widget
class EyeDropper : public Widget
{
Font m_font;
Cursor m_cursor;
bool m_isHexFormat;
public:
EyeDropper(Widget* parent)
: Widget(parent)
, m_font(L"Courier", 10)
, m_cursor(ResourceId(IDC_EYEDROPPER))
, m_isHexFormat(false)
{
setBgColor(Color::Black);
setPreferredSize(Size(64, 64));
}
void setHexFormat(bool hexFormat)
{
m_isHexFormat = hexFormat;
invalidate(true);
}
protected:
virtual void onPaint(PaintEvent& ev)
{
// remember not to call the base implementation of onPaint (Widget::onPaint)
Graphics& g = ev.getGraphics();
Rect rc = getClientBounds();
Color bg = getBgColor();
Pen blackPen(Color::Black);
Pen whitePen(Color::White);
g.drawRect(blackPen, rc);
rc.shrink(1);
g.drawRect(whitePen, rc);
rc.shrink(1);
g.drawRect(blackPen, rc);
g.setFont(m_font);
// draw the text
String str;
if (m_isHexFormat)
str = format_string(L"#%02x%02x%02x", bg.getR(), bg.getG(), bg.getB());
else
str = format_string(L"(%d, %d, %d)", bg.getR(), bg.getG(), bg.getB());
g.drawString(str, bg.toBlackAndWhite().negative(),
rc.getCenter() - Point(g.measureString(str)/2));
// copy the string to the clipboard
Clipboard(this).setString(str);
}
virtual void onMouseDown(MouseEvent &ev)
{
// remember to call the base implementation to generated the MouseDown signal
Widget::onMouseDown(ev);
captureMouse();
}
virtual void onMouseMove(MouseEvent &ev)
{
// remember to call the base implementation to generated the MouseMove signal
Widget::onMouseMove(ev);
if (hasCapture()) {
ScreenGraphics g;
setBgColor(g.getPixel(System::getCursorPos()));
invalidate(true);
}
}
virtual void onMouseUp(MouseEvent &ev)
{
// remember to call the base implementation to generated the MouseUp signal
Widget::onMouseUp(ev);
if (hasCapture())
releaseMouse();
}
virtual void onSetCursor(SetCursorEvent &ev)
{
if (!ev.isConsumed() && hasCapture())
ev.setCursor(m_cursor);
Widget::onSetCursor(ev);
}
};
// the main window
class MainFrame : public Frame
{
Label m_label;
EyeDropper m_eyeDropper;
ToggleButton m_hexFormat;
public:
MainFrame()
: Frame(L"Eye Dropper", NULL, Frame::Styles::Default
- Frame::Styles::Resizable
- Frame::Styles::Maximizable)
, m_label(L"Drag from the box to the pixel\r\n"
L"that you want to get its color", this)
, m_eyeDropper(this)
, m_hexFormat(L"Hex", this)
{
setLayout(new BoxLayout(Orientation::Vertical, false));
m_hexFormat.Click.connect(&MainFrame::onHexToggle, this);
setSize(getPreferredSize());
}
protected:
void onHexToggle(Event& ev)
{
m_eyeDropper.setHexFormat(m_hexFormat.isSelected());
}
};
int VACA_MAIN()
{
Application app;
MainFrame frm;
frm.setIcon(ResourceId(IDI_VACA));
frm.setVisible(true);
app.run();
return 0;
}