px4-firmware/NxWidgets/UnitTests/CLabel/clabeltest.cxx

264 lines
7.4 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// NxWidgets/UnitTests/CLabel/clabeltest.cxx
//
// Copyright (C) 2012 Gregory Nutt. All rights reserved.
// Author: Gregory Nutt <gnutt@nuttx.org>
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
// 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
// me be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Included Files
/////////////////////////////////////////////////////////////////////////////
#include <nuttx/config.h>
#include <nuttx/init.h>
#include <cstdio>
#include <cerrno>
#include <debug.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxfonts.h>
#include "nxconfig.hxx"
#include "clabeltest.hxx"
#include "cbgwindow.hxx"
/////////////////////////////////////////////////////////////////////////////
// Definitions
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Private Classes
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Private Data
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Public Data
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Public Function Prototypes
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// CLabelTest Method Implementations
/////////////////////////////////////////////////////////////////////////////
// CLabelTest Constructor
CLabelTest::CLabelTest()
{
m_bgWindow = (CBgWindow *)NULL;
m_nxFont = (CNxFont *)NULL;
m_text = (CNxString *)NULL;
}
// CLabelTest Descriptor
CLabelTest::~CLabelTest()
{
disconnect();
}
// Connect to the NX server
bool CLabelTest::connect(void)
{
// Connect to the server
bool nxConnected = CNxServer::connect();
if (nxConnected)
{
// Create the default font instance
m_nxFont = new CNxFont(NXFONT_DEFAULT,
CONFIG_NXWIDGETS_DEFAULT_FONTCOLOR,
CONFIG_NXWIDGETS_TRANSPARENT_COLOR);
if (!m_nxFont)
{
printf("CLabelTest::connect: Failed to create the default font\n");
}
// Set the background color
if (!setBackgroundColor(CONFIG_CLABELTEST_BGCOLOR))
{
printf("CLabelTest::connect: setBackgroundColor failed\n");
}
}
return nxConnected;
}
// Disconnect from the NX server
void CLabelTest::disconnect(void)
{
// Close the window
if (m_bgWindow)
{
delete m_bgWindow;
}
// Free the display string
if (m_text)
{
delete m_text;
m_text = (CNxString *)NULL;
}
// Free the default font
if (m_nxFont)
{
delete m_nxFont;
m_nxFont = (CNxFont *)NULL;
}
// And disconnect from the server
CNxServer::disconnect();
}
// Create the background window instance. This function illustrates
// the basic steps to instantiate any window:
//
// 1) Create a dumb CWigetControl instance
// 2) Pass the dumb CWidgetControl instance to the window constructor
// that inherits from INxWindow. This will "smarten" the CWidgetControl
// instance with some window knowlede
// 3) Call the open() method on the window to display the window.
// 4) After that, the fully smartened CWidgetControl instance can
// be used to generate additional widgets by passing it to the
// widget constructor
bool CLabelTest::createWindow(void)
{
// Initialize the widget control using the default style
m_widgetControl = new CWidgetControl((CWidgetStyle *)NULL);
// Get an (uninitialized) instance of the background window as a class
// that derives from INxWindow.
m_bgWindow = getBgWindow(m_widgetControl);
if (!m_bgWindow)
{
printf("CLabelTest::createGraphics: Failed to create CBgWindow instance\n");
delete m_widgetControl;
return false;
}
// Open (and initialize) the window
bool success = m_bgWindow->open();
if (!success)
{
printf("CLabelTest::createGraphics: Failed to open background window\n");
delete m_bgWindow;
m_bgWindow = (CBgWindow*)0;
return false;
}
return true;
}
// Create a CLabel instance
CLabel *CLabelTest::createLabel(FAR const char *text)
{
// Get the width of the display
struct nxgl_size_s windowSize;
if (!m_bgWindow->getSize(&windowSize))
{
printf("CLabelTest::createGraphics: Failed to get window size\n");
return (CLabel *)NULL;
}
// Create a CNxString instance to contain the C string
m_text = new CNxString(text);
// Get the height and width of the text display area
nxgl_coord_t stringWidth = m_nxFont->getStringWidth(*m_text);
nxgl_coord_t stringHeight = (nxgl_coord_t)m_nxFont->getHeight();
// The default CLabel has borders enabled with thickness of the border
// width. Add twice the thickness of the border to the width and height. (We
// could let CLabel do this for us by calling CLabel::getPreferredDimensions())
stringWidth += 2 * 1;
stringHeight += 2 * 1;
// Pick an X/Y position such that the label will be centered in the display
nxgl_coord_t labelX;
if (stringWidth >= windowSize.w)
{
labelX = 0;
}
else
{
labelX = (windowSize.w - stringWidth) >> 1;
}
nxgl_coord_t labelY;
if (stringHeight >= windowSize.h)
{
labelY = 0;
}
else
{
labelY = (windowSize.h - stringHeight) >> 1;
}
// Now we have enough information to create the label
return new CLabel(m_widgetControl, labelX, labelY, stringWidth, stringHeight, *m_text);
}
// Draw the label
void CLabelTest::showLabel(CLabel *label)
{
label->enable();
label->enableDrawing();
label->redraw();
label->disableDrawing();
}