why the QSplitter cannot show the width as I specified?

Hi, I have encountered a weird problem:

Code:

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hctrl = new QTextBrowser();////////////////////////////
    hctrl->setReadOnly(TRUE);
 
	hctrl->setFixedHeight(150);
 
	QSplitter* LeftPanel=new QSplitter(Qt::Vertical);
	LeftPanel->setFixedWidth(18);
	LeftPanel->setFixedHeight(150);
 
	QPushButton* quickButton=new QPushButton("@",LeftPanel);
	QPushButton* focusButton=new QPushButton("F",LeftPanel);
        QPushButton* infoButton=new QPushButton("I",LeftPanel);
	QPushButton* zoomButton=new QPushButton("Z",LeftPanel);
	QPushButton* firstButton=new QPushButton("H",LeftPanel);
	QPushButton* lastButton=new QPushButton("E",LeftPanel);
	QPushButton* closeButton=new QPushButton("C",LeftPanel);
 
 
	clustercanvas= new QGLWidget;
        clustercanvas->setFixedWidth(325);
	clustercanvas->setFixedHeight(150);
	panel = new QSplitter(Qt::Horizontal);
	panel->addWidget(LeftPanel);
	panel->addWidget(hctrl);
	panel->addWidget(clustercanvas);

---

However, the display is like this:
http://www.qtcentre.org/attachment.p...2&d=1310606806

The width of the left part (marked by red pen) is actually 360 instead of 18.

Why? How can I keep the width of the left part to be 18?

Thanks a lot!

Code:

---

...
	panel = new QSplitter(Qt::Horizontal);
	panel->addWidget(LeftPanel);
	panel->addWidget(hctrl);
	panel->addWidget(clustercanvas);
 
	int index = panel.indexOf(LeftPanel);
	if(index > -1)
	{
		QList<int> sizes = panel.sizes();
		sizes[index] = 18;
		panel.setSizes(sizes);
	}

---

Hi, thank you very much, I have tried your method, but the result is the same.

---

Added after 25 minutes:

I followed your idea.

Since the number o button in the panel is not too many, I just set the width of the buttons directly by setfixedwith(16);

Thanks again.

you can also set the size for LeftPanel directly