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Thread: Problem: QDialog change background when move the mouse

  1. 4th October 2011, 18:35 #1
    Gerard
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    Default Problem: QDialog change background when move the mouse

    I implemented a QDialog with transparent background, but i move the mouse over QDialog, background becomes dark.

    What's the problem?


    my code:

    Note: numPadDialog is derived class of QDialog.

    Qt Code: 
    1. // Constructor, call some functions to implent QDialog
    2. numPadDialog::numPadDialog() {
    3. 	// TODO Auto-generated constructor stub
    4. 	setWallpaper();   //This function try put a background dark semi-transparent
    5. 	setNumericPad();  // This function put the image of numpad
    6. 	configureInterfaceNumericPad();  // This function configure map of the buttons of numpad
    7. 	setInfo("Configure this parameter: ");  //This function put extra information about numPad
    8. 	showDialog();  // This function show the QDialog 
    9. }
    10.  
    11. //This function try put a background dark semi-transparent
    12. void numPadDialog::setWallpaper(){
    13.  
    14. 	mask= new QLabel(this);
    15. 	//set image
    16. 	QString style;
    17. 	style.clear();
    18. 	QString numPadPath;
    19. 	numPadPath.clear();
    20. 	numPadPath.append(QDir::currentPath());
    21. 	numPadPath.append(WALLPAPER_DIRECTORY);
    22. 	numPadPath.append(KEYPAD_BACKGROUND);  // image semi-transparent, dark
    23.  
    24. 	style.append("background-color: transparent;  background: transparent; background-image: url(");
    25. 	style.append(numPadPath);
    26. 	style.append("); ");
    27. 	mask->setStyleSheet(style);
    28. 	mask->setGeometry(0,0,320,240);
    29. 	mask->setFocusPolicy(Qt::NoFocus);
    30. }
    31.  
    32.  
    33. // This function put the image of numpad
    34. void numPadDialog::setNumericPad(){
    35.  
    36. 	numPad= new QLabel(this);
    37. 	//set image
    38. 	QString style;
    39. 	style.clear();
    40. 	QString numPadPath;
    41. 	numPadPath.clear();
    42. 	numPadPath.append(QDir::currentPath());
    43. 	numPadPath.append(WALLPAPER_DIRECTORY);
    44. 	numPadPath.append(KEYPAD_NUMPAD);
    45.  
    46. 	style.append("background-color: transparent;  background: transparent; background-image: url(");
    47. 	style.append(numPadPath);
    48. 	style.append("); ");
    49. 	numPad->setStyleSheet(style);
    50. 	numPad->setGeometry(0,0,320,240);
    51. 	numPad->setFocusPolicy(Qt::NoFocus);
    52. }
    53.  
    54. // This function show the QDialog 
    55. void numPadDialog::showDialog(){
    56. 	this->setWindowFlags(Qt::FramelessWindowHint);
    57. 	this->setAttribute(Qt::WA_NoSystemBackground);
    58. 	//this->setAttribute(Qt::WA_TransparentForMouseEvents);
    59. 	//this->setAttribute(Qt::WA_NoBackground);
    60. 	this->setFixedSize(320,240);  // ( x , y )
    61. 	this->setFocusPolicy(Qt::NoFocus);
    62. 	exec();
    63. }
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  2. 7th October 2011, 23:46 #2
    wysota's Avatar
    wysota
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    Default Re: Problem: QDialog change background when move the mouse

    Don't use stylesheets. Either use QPalette or just paint the background in the paint event.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.

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  3. 21st October 2011, 11:25 #3
    Gerard
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    Default Re: Problem: QDialog change background when move the mouse

    Thank's for your help wysota! but don't works

    i need to charge 2 images:

    first-> semi-transparent background
    second-> image of keypad

    I have to try with QPalette but screen is black.

    the code used is:


    Qt Code: 
    1. //set background
    2. 	QString wallPaperPath;
    3. 	wallPaperPath.clear();
    4. 	wallPaperPath.append(QDir::currentPath());
    5. 	wallPaperPath.append(WALLPAPER_DIRECTORY);
    6. 	wallPaperPath.append(KEYPAD_NUMPAD);                                        //this line charge the keypad image but first i use the background image------>    wallPaperPath.append(BACKGROUND); in other previus function
    7. 	//wallPaperPath.append(WALLPAPER);
    8.  
    9. 	QImage image;
    10. 	image.load(wallPaperPath,0);
    11. 	QBrush brush;
    12. 	brush.setStyle(Qt::SolidPattern);
    13. 	brush.setTextureImage(image);
    14.  
    15. 	QPalette palette;
    16. 	palette.setBrush(QPalette::Active, QPalette::Window, brush);
    17. 	palette.setBrush(QPalette::Inactive, QPalette::Window, brush);
    18. 	palette.setBrush(QPalette::Disabled, QPalette::Window, brush);
    19. 	palette.setBrush(QPalette::Normal, QPalette::Window, brush);
    20. 	palette.setBrush(QPalette::Current, QPalette::Window, brush);
    21.  
    22. 	palette.setBrush(QPalette::Active, QPalette::Background, brush);
    23. 	palette.setBrush(QPalette::Inactive, QPalette::Background, brush);
    24. 	palette.setBrush(QPalette::Disabled, QPalette::Background, brush);
    25. 	palette.setBrush(QPalette::Normal, QPalette::Background, brush);
    26. 	palette.setBrush(QPalette::Current, QPalette::Background, brush);
    27.  
    28. 	palette.setBrush(QPalette::Active, QPalette::Foreground, brush);
    29. 	palette.setBrush(QPalette::Inactive, QPalette::Foreground, brush);
    30. 	palette.setBrush(QPalette::Disabled, QPalette::Foreground, brush);
    31. 	palette.setBrush(QPalette::Normal, QPalette::Foreground, brush);
    32. 	palette.setBrush(QPalette::Current, QPalette::Foreground, brush);
    33.  
    34. 	palette.setBrush(QPalette::Active, QPalette::Base, brush);
    35. 	palette.setBrush(QPalette::Inactive, QPalette::Base, brush);
    36. 	palette.setBrush(QPalette::Disabled, QPalette::Base, brush);
    37. 	palette.setBrush(QPalette::Normal, QPalette::Base, brush);
    38. 	palette.setBrush(QPalette::Current, QPalette::Base, brush);
    39.  
    40. 	palette.setBrush(QPalette::Active, QPalette::AlternateBase, brush);
    41. 	palette.setBrush(QPalette::Inactive, QPalette::AlternateBase, brush);
    42. 	palette.setBrush(QPalette::Disabled, QPalette::AlternateBase, brush);
    43. 	palette.setBrush(QPalette::Normal, QPalette::AlternateBase, brush);
    44. 	palette.setBrush(QPalette::Current, QPalette::AlternateBase, brush);
    45.  
    46. 	palette.setBrush(QPalette::Active, QPalette::Highlight, brush);
    47. 	palette.setBrush(QPalette::Inactive, QPalette::Highlight, brush);
    48. 	palette.setBrush(QPalette::Disabled, QPalette::Highlight, brush);
    49. 	palette.setBrush(QPalette::Normal, QPalette::Highlight, brush);
    50. 	palette.setBrush(QPalette::Current, QPalette::Highlight, brush);
    51.  
    52. 	palette.setBrush(QPalette::Active, QPalette::Light, brush);
    53. 	palette.setBrush(QPalette::Inactive, QPalette::Light, brush);
    54. 	palette.setBrush(QPalette::Disabled, QPalette::Light, brush);
    55. 	palette.setBrush(QPalette::Normal, QPalette::Light, brush);
    56. 	palette.setBrush(QPalette::Current, QPalette::Light, brush);
    57.  
    58. 	this->setPalette(palette);
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