阿勇的blog

前幾天發現在Qt5裡，所有的fixed function pipeline都不能編譯了。稍微google了一下，才發現，原來Qt5所有precompile的安裝包，都是用ANGLE layer來實作OpenGL ES2，也就是你要寫的是OpenGL ES2，而不是OpenGL。所以一些fixed function pipeline的function，例如glBegin/glEnd都不能用了。

void ColorButton::setColor(QColor color)
{
QPixmap pixmap(this->iconSize());
pixmap.fill(color);
this->setIcon(QIcon(pixmap));
selectedColor = color;
this->update();
}
void ColorButton::init(QColor color)
{
colorDialog.setCurrentColor(color);
QObject::connect(this, SIGNAL(clicked()),
&colorDialog, SLOT(open()));
QObject::connect(&colorDialog, SIGNAL(colorSelected(QColor)),
this, SLOT(setColor(QColor)));
setColor(color);
}
void ColorButton::paintEvent(QPaintEvent *event)
{
QPushButton::paintEvent(event);
QPainter painter(this);
painter.setCompositionMode(QPainter::CompositionMode_Screen);
painter.fillRect(0, 0, this->width(), this->height(), selectedColor);
}

void ColorButton::setColor(QColor color)
{
QPixmap pixmap(this->iconSize());
pixmap.fill(color);
QPainter painter;
painter.begin(&pixmap);
painter.setPen(0xffffff-color.rgb());
painter.drawRect(0,0, pixmap.width()-1, pixmap.height()-1);
painter.end();
this->setIcon(QIcon(pixmap));
}
void ColorButton::init(QColor color)
{
colorDialog.setCurrentColor(color);
QObject::connect(this, SIGNAL(clicked()),
&colorDialog, SLOT(open()));
QObject::connect(&colorDialog, SIGNAL(colorSelected(QColor)),
this, SLOT(setColor(QColor)));
setColor(color);
}

QStyle定義了一些系統視窗相關的風格，像是圖示和gui的樣式。 qApp->style()->standardIcon(QStyle::SP_MediaVolumeMuted

這一篇，是把上一篇的文章改成一個class
header file

使用QFontDatabase::addApplicationFont，可以直接讀取字型 檔(ttc, ttf)。

#include <QFontDatabase>
QString loadFontFromFile(QString path)
{
static QString font;
static bool loaded = false;
if(!loaded)
{
loaded = true;
int loadedFontID = QFontDatabase::addApplicationFont(path);
QStringList loadedFontFamilies = QFontDatabase::applicationFontFamilies(loadedFontID);
if(!loadedFontFamilies.empty())
font = loadedFontFamilies.at(0);
}
return font;
}
QString fontName = loadFontFromFile(":/font/font2.TTC");
QFont font(fontName);

利用QPainterPath算出polygon之後，就可以畫出邊框
QPainterPath path;
path.addText(QPointF(0, 0), QFont("Arial", 100), QString::fromUtf8("你要不要喝紅茶ˊ_>ˋ？"));
GLuint id = glGenLists(1);
glNewList(id, GL_COMPILE);
foreach(QPolygonF polygon, path.toSubpathPolygons()){
glBegin(GL_LINE_LOOP);
foreach(QPointF point, polygon){
glVertex3f(point.rx(), -point.ry(), 0);
}
glEnd();
}
glEndList();

 
主要是Mac不像windows有邊框，所以不像windows只要
scene->addWidget(widget, Qt::Dialog);

1.download Qt library 4.7.2 and MinGW
2.install Qt to C:\Qt\4.7.2
3.unzip mingw.zip to c:\Qt
4.download Qt creator

install NetBeans 6.9.1-cppdownload Qt library 4.7.2 and MinGWinstall Qtunzip mingw.zip to c:\Qtopen c:/Qt/4.7.2/mkspecs/default/qmake.confreplace $${DIR_SEPARATOR} as/run NetBeansTool->Options->c/c++->addBrowser->c:\Qt\mingw\bin->okQMake Command->c:\Qt\4.7.2\bin\qmake.exeFile->New Project->Sample->C/C++->Hello Qt WorldFile->Project Properties->Run->Configuration->All ConfigurationEnvironment->Path:C:\Qt\4.7.2\binnow run it