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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * 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.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may 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."
** $QT_END_LICENSE$
**
****************************************************************************/
/*
screenwidget.cpp
A widget to display colour components from an image using independently
selected colors. Controls are provided to allow the image to be inverted, and
the color to be selection via a standard dialog. The image is displayed in a
label widget.
*/
#include <QApplication>
#include <QColorDialog>
#include <QGridLayout>
#include <QImage>
#include <QLabel>
#include <QMenu>
#include <QMimeData>
#include <QMouseEvent>
#include <QPixmap>
#include <QPushButton>
#include <QWidget>
#include "screenwidget.h"
/*!
Initializes the paint color, the mask color (cyan, magenta,
or yellow), connects the color selector and invert checkbox to functions,
and creates a two-by-two grid layout.
*/
ScreenWidget::ScreenWidget(QWidget *parent, QColor initialColor,
const QString &name, Separation mask,
const QSize &labelSize)
: QFrame(parent)
{
paintColor = initialColor;
maskColor = mask;
inverted = false;
imageLabel = new QLabel;
imageLabel->setFrameShadow(QFrame::Sunken);
imageLabel->setFrameShape(QFrame::StyledPanel);
imageLabel->setMinimumSize(labelSize);
nameLabel = new QLabel(name);
colorButton = new QPushButton(tr("Modify..."));
colorButton->setBackgroundRole(QPalette::Button);
colorButton->setMinimumSize(32, 32);
QPalette palette(colorButton->palette());
palette.setColor(QPalette::Button, initialColor);
colorButton->setPalette(palette);
invertButton = new QPushButton(tr("Invert"));
//invertButton->setToggleButton(true);
//invertButton->setOn(inverted);
invertButton->setEnabled(false);
connect(colorButton, SIGNAL(clicked()), this, SLOT(setColor()));
connect(invertButton, SIGNAL(clicked()), this, SLOT(invertImage()));
QGridLayout *gridLayout = new QGridLayout;
gridLayout->addWidget(imageLabel, 0, 0, 1, 2);
gridLayout->addWidget(nameLabel, 1, 0);
gridLayout->addWidget(colorButton, 1, 1);
gridLayout->addWidget(invertButton, 2, 1, 1, 1);
setLayout(gridLayout);
}
/*!
Creates a new image by separating out the cyan, magenta, or yellow
component, depending on the mask color specified in the constructor.
The amount of the component found in each pixel of the image is used
to determine how much of a user-selected ink is used for each pixel
in the new image for the label widget.
*/
void ScreenWidget::createImage()
{
newImage = originalImage.copy();
// Create CMY components for the ink being used.
float cyanInk = (255 - paintColor.red())/255.0;
float magentaInk = (255 - paintColor.green())/255.0;
float yellowInk = (255 - paintColor.blue())/255.0;
int (*convert)(QRgb);
switch (maskColor) {
case Cyan:
convert = qRed;
break;
case Magenta:
convert = qGreen;
break;
case Yellow:
convert = qBlue;
break;
}
for (int y = 0; y < newImage.height(); ++y) {
for (int x = 0; x < newImage.width(); ++x) {
QRgb p(originalImage.pixel(x, y));
// Separate the source pixel into its cyan component.
int amount;
if (inverted)
amount = convert(p);
else
amount = 255 - convert(p);
QColor newColor(
255 - qMin(int(amount * cyanInk), 255),
255 - qMin(int(amount * magentaInk), 255),
255 - qMin(int(amount * yellowInk), 255));
newImage.setPixel(x, y, newColor.rgb());
}
}
imageLabel->setPixmap(QPixmap::fromImage(newImage));
}
/*!
Returns a pointer to the modified image.
*/
QImage* ScreenWidget::image()
{
return &newImage;
}
/*!
Sets whether the amount of ink applied to the canvas is to be inverted
(subtracted from the maximum value) before the ink is applied.
*/
void ScreenWidget::invertImage()
{
//inverted = invertButton->isOn();
inverted = !inverted;
createImage();
emit imageChanged();
}
/*!
Separate the current image into cyan, magenta, and yellow components.
Create a representation of how each component might appear when applied
to a blank white piece of paper.
*/
void ScreenWidget::setColor()
{
QColor newColor = QColorDialog::getColor(paintColor);
if (newColor.isValid()) {
paintColor = newColor;
QPalette palette(colorButton->palette());
palette.setColor(QPalette::Button, paintColor);
colorButton->setPalette(palette);
createImage();
emit imageChanged();
}
}
/*!
Records the original image selected by the user, creates a color
separation, and enables the invert image checkbox.
*/
void ScreenWidget::setImage(QImage &image)
{
originalImage = image;
createImage();
invertButton->setEnabled(true);
}
|
