BREW RSS Reader - 6 / 9 -
Draw Screen
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This is the main screen for displaying the title and description of RSS items. |
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Define MainWindow
SFMTYPEDEFCLASS(MainWindow)
class MainWindow : public SFRTitleWindow {
SFMSEALCOPY(MainWindow)
private:
SInt16 _displine; // Head of lines to display
SInt16 _cursor; // Cursor position
SInt16 _maxline; // Number of lines to display
public:
MainWindow(SInt16 softkeyHeight);
static Void SetSoftkey(Void);
private:
HANDLER_DECLARE_VOIDRENDER(OnRenderContent) // Draw Handler
HANDLER_DECLARE_BOOLEVENT(OnKey) // Key Handler
};
Draw Handler for MainWindow
HANDLER_IMPLEMENT_VOIDRENDER(MainWindow, OnRenderContent, graphics)
{
// Get size of screen
SFXRectangle rectangle(GetContentWorld());
SFXRGBColor forecolor;
SFXRGBColor backcolor;
SIntN i;
RSSFeedPtr current;
// Get font height
SInt16 height = graphics->GetFontHeight();
// Get the bottom line of current rectangle
SInt16 bottom = rectangle.GetBottom();
// Set rectangle height to that of font
rectangle.SetHeight(height);
// Call parent handler ( clear screen )
SFRTitleWindow::ContentHandler(graphics);
// Get current feed from application class
current = RssReader::GetCurrentFeed();
rectangle.AddY((6 * height + 15));
// Set the height of rectangle as a function of font height
rectangle.SetHeight(((bottom -rectangle.GetTop())/height)* height);
graphics->FillRectangle(rectangle, SFXRGBColor(255, 255, 255, 0));
// Set the character color
graphics->SetForeColor(SFXRGBColor(0, 0, 0, 0));
if (current != null &&
current->GetSize() > _displine + _cursor) {
_currentRect = rectangle;
if(_currentRect.GetY() >= rectangle.GetY())
{
_currentRect.SubY(_moveY);
}
_currentRect.AddHeight(500);
// Draw the description of item that _cursor points to
graphics->DrawString(
current->GetItem(_displine + _cursor)->description,
_currentRect,
IDF_ALIGN_LEFT | IDF_ALIGN_MIDDLE);
}
rectangle.SubY((6 * height + 15));
// Set rectangle height to that of font
rectangle.SetHeight(height);
// Draw each line
for (i = _displine; i < _displine + _maxline ; ++i) {
// If it forms a line with the cursor
if (i - _displine == _cursor) {
// Change color
forecolor.Set(0xff, 0xff, 0xff, 0x00);
backcolor.Set(0x66, 0x66, 0xff, 0x00);
}
else {
forecolor.Set(0x00, 0x00, 0x00, 0x00);
// The color is changed at odd or even lines
if (i % 2 == 0) { // change color every other line
backcolor.Set(0xdd, 0xdd, 0xff, 0);
} else {
backcolor.Set(0xee, 0xee, 0xff, 0);
}
}
// Draw background rectangle of item title
graphics->FillRectangle(rectangle, backcolor);
graphics->SetForeColor(forecolor);
if (current != null &&
i < current->GetSize()) {
if (current->GetItem(i)->title.IsEmpty()) {
// draw title string of i th item
graphics->DrawText("[No Subject]",
rectangle,
IDF_ALIGN_LEFT | IDF_ALIGN_MIDDLE);
} else {
// If it forms a line with the cursor
if (i - _displine == _cursor) {
_currentRect = rectangle;
_currentRect.SubX(_moveX);
_currentRect.AddWidth(150);
if (current->GetItem(i)->alreadyRead) {
// Draw title string of i th item
graphics->DrawText(
current->GetItem(i)->title,
_currentRect,
IDF_ALIGN_LEFT | IDF_ALIGN_MIDDLE);
} else {
// Set the font to bold-faced
SFXRGBColor fontColor(0x99, 0x00, 0x00, 0x00);
graphics->SetFont(AEE_FONT_BOLD);
// Draw title string of i th item
graphics->DrawText(
current->GetItem(i)->title,
_currentRect, fontColor,
IDF_ALIGN_LEFT | IDF_ALIGN_MIDDLE);
graphics->SetFont(AEE_FONT_NORMAL);
}
}
}
}
rectangle.AddY(height);
// move down rectangle by its height
}
rectangle.AddY(15);
rectangle.SubY(3);
rectangle.Deflate(0,3);
graphics->FillRectangle(rectangle, SFXRGBColor(128, 128, 128, 255));
}
Key Handler
HANDLER_IMPLEMENT_BOOLEVENT(MainWindow, OnKey, event)
{
SFXRectangle rectangle;
RSSFeedPtr current;
switch (event.GetP16()) {
case AVK_DOWN: // If down key pressed
if (_cursor == _maxline - 1) {
// if cursor is at the bottom
++_displine; // Move display line down
} else {
++_cursor; // Move cursor down
}
InvalidateContent(); // Redraw window
_moveY = 0; // Reset description
return true;
case AVK_UP: // If up key pressed
// If cursor is at the top
if (_cursor == 0) {
// If display line can be moved up
if (_displine > 0) {
--_displine; // Move display line up
InvalidateContent(); // Redraw window
}
} else {
--_cursor; // Move cursor up
InvalidateContent(); // Redraw window
}
return true; // If SOFT2 or 9 key pressed
_moveY = 0; // Reset description
case AVK_RIGHT: // Scroll Horizontally right
_moveX = _moveX + 5;
InvalidateContent();
return true;
case AVK_LEFT: // Scroll Horizontally left
if(_moveX > 0)
{
_moveX = _moveX - 5;
InvalidateContent();
}
return true;
case AVK_8: // Scroll Vertically down
_moveY = _moveY + 5;
InvalidateContent();
return true;
case AVK_2: // Scroll Vertically up
if(_moveY > 0)
{
_moveY = _moveY - 5;
InvalidateContent();
}
return true;
case AVK_SOFT2: case AVK_9:
// Create window for managing feeds
rectangle.Set(GetBaseBound());
rectangle.AddLeftTop(SUBSURIPTION_MARGIN,
SUBSURIPTION_MARGIN);
::new SubscriptionWindow(rectangle);
return true;
case AVK_SELECT: // If SELECT key pressed
current = RssReader::GetCurrentFeed();
// Change staus of items from unread to already read
if (current != null &&
current->GetSize() > _displine + _cursor) {
current->GetItem(_displine + _cursor)
-> alreadyRead = true;
InvalidateContent();
}
return true;
}
return false;
}
