Thank you.
I noticed that checking/unchecking the button (that is, creating it
with/without the material icon) the layout width can change. If I use many
buttons like a ChipGroup that breaks the line sometimes the last button
goes to the next line.
I would like that the button has a reserved space for the icon also when it
has not the icon, I mean the button width does not change.
How can this be achieved?
Il giorno mercoledì 19 agosto 2020 alle 08:14:53 UTC+2 Shai Almog ha
scritto:
> When you change the UI in a way that impacts size you need to call
> animateLayout() or revalidate().
> When you don't impact size calling repaint() is enough.
>
> I would suggest using setMaterialIcon() instead of coding the check into
> the text.
>
> On Tuesday, August 18, 2020 at 3:09:08 PM UTC+3 P5music wrote:
>
>> I created a Container that resembles the Chip Android control.
>> In fact I just need that a button acts like a CheckBox or ToggleButton.
>>
>> In my implementation the button has rounded corners and it has a check
>> symbol when it is checked (checked=true).
>> That symbols is put at the beginning of the label of the button.
>>
>> I tried by just changing the text of the button, but it was not updated,
>> then in the code below the button is removed and then recreated.
>> But it does not work yet: what I experience is that the control gets
>> updated only if I enter a TextField and click on the button again. Calling
>> invalidate() is of no help.
>> Note that this is similar to what happened with the BrowserComponent. Is
>> it something related to UI refresh?
>> However, what's wrong with this code?
>>
>> import com.codename1.ui.Button;
>> import com.codename1.ui.Container;
>> import com.codename1.ui.events.ActionEvent;
>> import com.codename1.ui.events.ActionListener;
>> import com.codename1.ui.layouts.BoxLayout;
>> import com.codename1.ui.plaf.RoundBorder;
>>
>> public class MyChip extends Container {
>>
>> boolean checked;
>>
>> Button button;
>> String label;
>>
>>
>> public void setAppearance()
>> {
>> String labelText=label;
>> if (button!=null) button.remove();
>>
>>
>> if (checked) labelText="✓ "+label;
>> button=new Button(labelText);
>> button.addActionListener(new ActionListener() {
>> @Override
>> public void actionPerformed(ActionEvent evt) {
>> setChecked(!checked);
>> }
>> });
>>
>> button.getAllStyles().setBorder(RoundBorder.create()
>> .rectangle(true)
>> .color(0xaaaaaa));
>>
>> add(button);
>>
>> }
>> public MyChip(String labelParam)
>> {
>> this.label=labelParam;
>> setLayout(BoxLayout.x());
>> setChecked(false);
>>
>> }
>> public void setChecked(boolean state)
>> {
>>
>> checked=state;
>> setAppearance();
>>
>>
>> }
>>
>> public boolean isChecked()
>> {
>> return checked;
>> }
>>
>>
>> }
>>
>>
>>
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