I use a theme in a resource editor file inside the src folder to set a form's background color, but in runtime the form's background color is still blank ! Here is code :
public class Saisie extends Form implements ActionListener {
...
public Resources r;
public Hashtable tTheme;
...
public Saisie(MIDlet midlet)
{
super("Saisie situation");
try {
r = Resources.open("/resources.res");
tTheme = r.getTheme("Theme");
UIManager.getInstance().setThemeProps(tTheme);
} catch (IOException ex) {
}
...
}
...
}
Check that you set the bg transparency to 255. If you are making this change after creating the form make sure to refresh it.
Related
I'm using Itext 7 and their html2Pdf lib.
Is there a way to implement for example cmyk colors.
.wootWorkingCMYK-color{
color: cmyk( 1 , 0.69 , 0.08 , 0.54);
}
I know the itext core part pretty good, looking for away to use the html2Pdf side. I'm aware of the CssApplierFactory but this seems to be to far up the chain.
Well, of course there is a way of processing custom CSS properties like cmyk colors, but unfortunately the code would be quite bulky and you will need to write quite some code for different cases. I will show how to apply custom color for font, but e.g. for backgrounds, borders or other cases you will need to write separate code in a similar way. Reason behind it is that iText layout structure, although designed with HTML/CSS in mind, is not 100% similar and has some differences you have to code around.
Having that said, if you can fork, build and use your custom version from sources, this is the way I would advice to go. Although it has drawbacks like having to rebase to get updates, the solution would be simpler and more generic. To do that, search for usages of CssUtils.parseRgbaColor in pdfHTML module, and you will find that it is used in BackgroundApplierUtil, BorderStyleApplierUtil, FontStyleApplierUtil, OutlineApplierUtil. There you will find code like
if (!CssConstants.TRANSPARENT.equals(cssColorPropValue)) {
float[] rgbaColor = CssUtils.parseRgbaColor(cssColorPropValue);
Color color = new DeviceRgb(rgbaColor[0], rgbaColor[1], rgbaColor[2]);
float opacity = rgbaColor[3];
transparentColor = new TransparentColor(color, opacity);
} else {
transparentColor = new TransparentColor(ColorConstants.BLACK, 0f);
}
Which I belive you can tweak to process cmyk as well, knowing that you know core part pretty well.
Now, the solution without custom pdfHTML version is to indeed start with implementing ICssApplierFactory, or subclassing default implementation DefaultCssApplierFactory. We are mostly interested in customizing implementation of SpanTagCssApplier and BlockCssApplier, but you can consult with DefaultTagCssApplierMapping to get the full list of appliers and cases they are used in, so that you can decide which of them you want to process in your code.
I will show you how to add support for custom color space for font color in the two main applier classes I mentioned and you can work from there.
private static class CustomCssApplierFactory implements ICssApplierFactory {
private static final ICssApplierFactory DEFAULT_FACTORY = new DefaultCssApplierFactory();
#Override
public ICssApplier getCssApplier(IElementNode tag) {
ICssApplier defaultApplier = DEFAULT_FACTORY.getCssApplier(tag);
if (defaultApplier instanceof SpanTagCssApplier) {
return new CustomSpanTagCssApplier();
} else if (defaultApplier instanceof BlockCssApplier) {
return new CustomBlockCssApplier();
} else {
return defaultApplier;
}
}
}
private static class CustomSpanTagCssApplier extends SpanTagCssApplier {
#Override
protected void applyChildElementStyles(IPropertyContainer element, Map<String, String> css, ProcessorContext context, IStylesContainer stylesContainer) {
super.applyChildElementStyles(element, css, context, stylesContainer);
String color = css.get("color2");
if (color != null) {
color = color.trim();
if (color.startsWith("cmyk")) {
element.setProperty(Property.FONT_COLOR, new TransparentColor(parseCmykColor(color)));
}
}
}
}
private static class CustomBlockCssApplier extends BlockCssApplier {
#Override
public void apply(ProcessorContext context, IStylesContainer stylesContainer, ITagWorker tagWorker) {
super.apply(context, stylesContainer, tagWorker);
IPropertyContainer container = tagWorker.getElementResult();
if (container != null) {
String color = stylesContainer.getStyles().get("color2");
if (color != null) {
color = color.trim();
if (color.startsWith("cmyk")) {
container.setProperty(Property.FONT_COLOR, new TransparentColor(parseCmykColor(color)));
}
}
}
}
}
// You might want a safer implementation with better handling of corner cases
private static DeviceCmyk parseCmykColor(String color) {
final String delim = "cmyk(), \t\r\n\f";
StringTokenizer tok = new StringTokenizer(color, delim);
float[] res = new float[]{0, 0, 0, 0};
for (int k = 0; k < 3; ++k) {
if (tok.hasMoreTokens()) {
res[k] = Float.parseFloat(tok.nextToken());
}
}
return new DeviceCmyk(res[0], res[1], res[2], res[3]);
}
Having that custom code, you should configure the ConverterProperties accordingly and pass it to HtmlConverter:
ConverterProperties properties = new ConverterProperties();
properties.setCssApplierFactory(new CustomCssApplierFactory());
HtmlConverter.convertToPdf(..., properties);
You might have noticed that I used color2 instead of color, and this is for a reason. pdfHTML has a mechanism of CSS property validation (as browsers do as well), to discard invalid CSS properties when calculating effective properties for an element. Unfortunately, there is no mechanism of customizing this validation logic currently and of course it treats cmyk colors as invalid declarations at the moment. Thus, if you really want to have custom color property, you will have to preprocess your HTML and replace declarations like color: cmyk... to color2: cmyk.. or whatever the property name you might want to use.
As I mentioned at the start of the answer, my recommendation is to build your own custom version :)
SWT Text has a method called setMessage which can be used with SWT.SEARCH to put an initial faded-out message in the text box.
Can something similar be done with SWT Combo? It seems it does not have the setMessage() method, so it seems like some other trick needs to be applied here.
You are right, the Combo does not have regular API to set a message like the text widget does.
You could try to use a PaintListener to draw the message text while the Combo text is empty.
combo.addPaintListener( new PaintListener() {
#Override
public void paintControl( PaintEvent event ) {
if( combo.getText().isEmpty() ) {
int x = ...; // indent some pixels
int y = ...; // center vertically
event.gc.drawText( "enter something", x, y );
}
}
} );
In addition, you would need several listeners that redraw the Combo after its native appearance was updated.
combo.addListener( SWT.Modify, event -> combo.redraw() );
A modify listener is certainly required to show/hide the message but there are probably more listeners necessary to redraw the message when it is invalidated. This answer may give further hints which events are necessary to capture: How to display a hint message in an SWT StyledText
Note, however, that drawing onto controls other than Canvas is unsupported and may not work on all platforms.
A simpler alternative to the paint listener that worked for my purposes involves programatically setting the text and text color using a FocusListener. Here is an example:
final String placeholder = "Placeholder";
combo.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_GRAY));
combo.setText(placeholder);
combo.addFocusListener(new FocusListener() {
#Override
public void focusLost(FocusEvent e) {
String text = combo.getText();
if(text.isEmpty()) {
combo.setText(placeholder);
combo.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_GRAY));
}
}
#Override
public void focusGained(FocusEvent e) {
String text = combo.getText();
if(text.equals(placeholder)) {
combo.setText("");
combo.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
}
}
});
I use RPC calls to connect to mySql and bring text data from there.
My page is defined as split Layout.
my problem is that I don't know how to update the main layout with different text.
if i use the clear() method it will remove all the layout !
"p" is the splitLayout.
RPC:
rpcService.getChapterTxt(selectedBook,bookChapters[selectedBook],
new AsyncCallback<List<BibleTxt>>(){
public void onFailure(Throwable caught)
{
Window.alert("Failed getting Chapter");
}
public void onSuccess(List<BibleTxt> result)
{
int i = 0 ;
String verseText ="";
//Label verseLabel = new Label();
PPanel chapterPar = new PPanel();
HTML page= new HTML(verseText);
for(i=0;i<result.size();i++)
{
verseText = result.get(i).getVerseText();
//verseLabel.setText(verseText);
page.setText(page.getText() + verseText);
}
chapterPar.add(page);
//p.clear();
p.add(chapterPar); // adds the main layout
}
});
Why you don't reuse the text component changing its content text instead of continuously detaching/attaching elements to the widget hierarchy. That way should perform better and cause less problems.
I want to disable the button maximize/minimize, below I post image to explain
this is my code :
public class ProjectWizardPageOne extends WizardPage {
private String platform;
public ProjectWizardPageOne(String title) {
super(title);
this.setTitle(title);
this.setMessage("Configure Project Name and Location");
}
#Override
public void createControl(Composite parent) {
Composite container = new Composite(parent,SWT.NONE);
setPageComplete(false);
setControl(container);
Canvas leftPanel = new Canvas(container, SWT.NONE);
leftPanel.setBackgroundImage(new Image(leftPanel.getDisplay(), this
.getClass().getClassLoader()
.getResourceAsStream("/icons/mypicture.png")));
leftPanel.setBounds(0, 0, 183, 282);
Composite rightContainer = new Composite(container, SWT.NONE);
rightContainer.setBackground(new Color(null, 255, 255, 255));
rightContainer.setBounds(181, 0, 399, 282);
}
public String getPlatform() {
return platform;
}
public void setPlatform(String platform) {
this.platform = platform;
}
}
I tried to get the Composite's Shell like this "container.getShell();"
but I don't understand How I can set these parameters "SWT.SHELL_TRIM | SWT.TOOL"!
Thanks
Controlling the Window/Shell is not the responsibility of a WizardPage, it can not do that. It's the responsibility of the WizardDialog or the code that creates it. In fact, there is no guarantee that a Wizard and its WizardPages will even be contained in a WizardDialog; anything can implement the IWizardContainer interface to present wizards in a different way.
Is it a File -> New wizard or a custom wizard that is programatically launched. If it is custom, you would have to create WizardDialog and then pass Wizard instance to it. When creating WizardDialog, you would also create Shell, for which you can send the argument without SWT.RESIZE. For File -> New, since the dialog is not created by you, I dont think you can control resize option there. The resize can only be passed in the constructor of Shell.
In case of dialogs, I have observed that I need to explicitly specify that I need min, max buttons at upper-right corner. For that I need to call the below method in a constructor:
setShellStyle(getShellStyle() | SWT.MAX | SWT.MIN | SWT.RESIZE);
Since Wizard is also a dialog, I can call the above method to reset the shellStyle not to include max, min, and other buttons (see above code). The wizard by default might be adding these buttons. But I think you can override this by recalling at the end of wizard creation. Hope this helps.
public class InstallerWizard extends Wizard{
...
main()
{
WizardDialog dialog = new DisableMax(shell, new InstallerWizard());
dialog.open();
}
}
public class DisableMax extends WizardDialog {
public DisableMax(Shell parentShell, IWizard newWizard) {
super(parentShell, newWizard);
setShellStyle(SWT.CLOSE | SWT.MIN | SWT.RESIZE | getDefaultOrientation());
}
}
I'm developing a gxt application that provides a view for svn-like versioning: A TreePanel that displays a file system structure with files and folders having different states (new, modified, deleted, etc.).
I want to display a small overlay icon on each of the items to reflect its state. What I could do, is to create an icon for each state, but I don't want to do that, because I would end up in creating a large bundle of redundant images.
What would be the best way to implement overlay icon capabilities in trees or grids?
After checking the dom of the tree structure, I figured out that a tree icon is displayed using the background-url css attribute. To ensure the image is being displayed with correct size, the src attribute of the element is filled with a placeholder image url.
The trick is, to replace the placeholder image with the overlay icon, since it is displayed above the actual image.
To accomplish this, I extended ClippedImagePrototype to inject the url of the overlay image:
public class OverlayImagePrototype extends ClippedImagePrototype {
protected String overlayImageUrl = null;
public static AbstractImagePrototype create(ImageResource resource, String overlayUrl) {
return new OverlayImagePrototype(resource.getSafeUri(),
resource.getLeft(), resource.getTop(), resource.getWidth(),
resource.getHeight(), overlayUrl);
}
private OverlayImagePrototype(SafeUri url, int left, int top, int width,
int height, String overlayUrl) {
super(url, left, top, width, height);
this.overlayImageUrl = overlayUrl;
}
public ImagePrototypeElement createElement() {
ImagePrototypeElement imgEl = super.createElement();
if (overlayImageUrl != null) {
imgEl.setAttribute("src", overlayImageUrl);
}
return imgEl;
}
}
This is how I use OverlayImagePrototype in the IconProvider implementation:
tree.setIconProvider(new ModelIconProvider<ModelData>() {
public AbstractImagePrototype getIcon(ModelData model) {
return OverlayImagePrototype.create(model.get("icon"), model.get("overlayIconUrl"));
}
});