I currently face the following problem:
I have 64 labels. Label_1 all the way up to Label_64.
I also have an int i.
"i" also goes from 1-64
I want that, when i == 1 Label_1 shall display an image. If i == 2, Label_2 shall display that image and so on.
Currently I'd do that with:
if(i == 1)
{
QPixmap pix("...");
ui->label_1->setPixmap(pix);
}
if(i == 2)
{
QPixmap pix("...");
ui->label_2->setPixmap(pix);
}
if(i == 3)
{
QPixmap pix("...");
ui->label_3->setPixmap(pix);
}
...
Is there some way to do that easier? Something like:
QPixmap pix("...");
ui->label_i->setPixmap(pix);
where the choosen label is directly defined by i?
You can store a list of QLabels.
QList<QLabel*> labels;
labels.at(i)->setPixmap(pix)
The disadvantage of this method is that you should manually assign ui->label_i to labels.at(i) for every i from 1 to 64 once:
labels.insert(0, NULL); // empty space to keep numbering the same.
labels.insert(1, ui->labels_1);
labels.insert(2, ui->labels_2);
...
labels.insert(64, ui->labels_64);
Depending on your specific case, you may use a more tricky solution. For example, if all the labels are stored in a QVBoxLayout at position 1 to 64, you can access label i as follows:
QVBoxLayout *layout = ...;
QLabel *label = qobject_cast<QWidget*> (layout->itemAt(i)->widget ());
if (label) // should be true if assumption is correct
label->setPixmap(pix);
You can also use method two to initialise the list of method 1.
See the Qt documentation for more information.
Related
Unsquashed Sprite Squashed Sprite
My brother has issues with his sprite squashing whilst moving horizontally. The squashing is permanent after moving. I have found the line that causes the problem but cannot figure out what is causing this issue. When I remove this line the squashing stops however the sprite does not turn. He is following Shaun Spalding's Complete Platformer Tutorial and though I've watched it over I cannot find any issues with the actual code.
/// #description Insert description here
// You can write your code in this editor
// get player input
key_left=keyboard_check(vk_left);
key_right=keyboard_check(vk_right);
key_jump=keyboard_check_pressed(vk_up);
// calculate movement
var move=key_right-key_left;
hsp=move*walksp;
vsp=vsp+grv;
if(place_meeting(x,y+1,o_wall)) and (key_jump)
{
vsp=-7;
}
// horizontal collision
if (place_meeting(x+hsp,y,o_wall))
{
while(!place_meeting(x+sign(hsp),y,o_wall))
{
x=x+sign(hsp);
}
hsp=0;
}
x=x+hsp;
// vertical collision
if (place_meeting(x,y+vsp,o_wall))
{
while(!place_meeting(x,y+sign(vsp),o_wall))
{
y=y+sign(vsp);
}
vsp=0;
}
y=y+vsp;
// animation
if(!place_meeting(x,y+1,o_wall))
{
sprite_index=splayerA;
image_speed=0;
if (sign(vsp) > 0) image_index = 1; else image_index = 0;
}
else
{
image_speed=1;
if (hsp==0)
{
sprite_index=s_player;
}
else
{
sprite_index=splayerR;
}
}
if (hsp != 0) image_xscale = sign(hsp); //this line is wrong and causes the squishing
A possible cause of this is that you've set the image_xscale to a different value before using the line:
if (hsp != 0) image_xscale = sign(hsp);
For example, you may have set this in the Create Event to enlarge the sprite:
image_xscale = 2;
But that value is reset after setting image_xscale again, as that line will only return -1 or 1 because of the Sign().
One quick solution is to apply the scale change to that line of code, like this:
if (hsp != 0) image_xscale = 2 * sign(hsp);
(Once again, presuming you've changed it's scale value somewhere else)
Though another solution is to enlarge the sprite itself in the sprite editor, so the scale doesn't have to be kept in mind everytime.
I'm trying to use the member variables from my client rect, but they are holding extremely negative values, like -858993460. Even when I call rect.Width(), it returns an extremely negative number. I need the values to determine the corresponding section of a wave file to play when I select the wave that I have drawn on the screen. Would anyone happen to know why it could be doing this?
Note: I threw int's right, left, and width in just to see what values they are holding. I really only need rect.Width() to scale the selection to be able to access the data array of my wave file.
void CWaveEditView::OnToolsPlay32775()
{
// TODO: Add your command handler code here
CWaveEditDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if(!pDoc){
return;
}
if(pDoc->wave.hdr==NULL){
return;
}
if(selectionStart!=selectionEnd){
CRect rect;
GetClientRect(&rect);
rect.NormalizeRect();
int right = rect.right;
int left = rect.left;
int width = rect.Width();
int startms=(1000.0*pDoc->wave.lastSample/pDoc->wave.sampleRate)*selectionStart/rect.Width();
int endms=(1000.0*pDoc->wave.lastSample/pDoc->wave.sampleRate)*selectionEnd/rect.Width();
WaveFile * selection = new WaveFile(pDoc->wave.numChannels, pDoc->wave.sampleRate, pDoc->wave.bitsPerSample);
while(startms<=endms){
selection->add_sample(pDoc->wave.get_sample(startms));
startms++;
}
selection->updateHeader();
selection->play();
delete selection;
}
The default constructor of CRect does not initialise its members (because it is a thin wrapper for the RECT structure). You could initialise it to (0,0,0,0) and check whether or not it is empty after your call to GetClientRect.
Since GetClientRect appears to be failing, you may want to check that your window handle is valid using GetSafeHwnd().
I already managed to create wxListCtrls with either icons or multicolumn text like this
Picture of two wxListCtrls
Now I'd like to add an icon to each line of the text list on the left. I thought this should be possible as typical wxWidgets applications like code::blocks and wxSmith often diplay icons in list/tree views (resource browser window) and even in tabs of notebooks (compiler log window).
So how can I create something like this? (Everybody knows Windows Explorer)
Picture of Explorer Window with icons
I tried this...
SetImageList (ToolImages, wxIMAGE_LIST_NORMAL);
InsertColumn (0, "Icon");
SetColumnWidth (0, 40);
...
for (int i=0; i<5; i++)
{
InsertItem (i, i);
SetItemColumnImage (i, 0, i);
SetItem (i, 1, IntToStr (i+1));
...
But as you can see, only the text gets displayd, the image column is blank. Is it possible at all to mix text and images in report mode? If not, what other wxControl class can I use to get the desired result?
Many Thanks in advance.
Yes, it is possible, and the listctrl sample shows how to do it, in particular see MyFrame::InitWithReportItems() function. The only difference with your code seems to be that you use a different InsertItem() overload, so perhaps you should use InsertItem(i, "") instead.
Also check that your image list does have the 5 icons in it.
More generally, trying to reduce the differences between your code and the (working) sample will almost always quickly find the problem.
Thanks, VZ, but I found out that it's not the InsertItem() but the SetImageList(). My image list was correct, but the "which" parameter wasn't. Replacing wxIMAGE_LIST_NORMAL by wxIMAGE_LIST_SMALL fixes the problem! I thought "SMALL" was only meant for the SMALL_ICON mode and that "NORMAL" should be the default. But yes, that makes sense, normal icons are big and don't fit in the text display. Would be nice if the documentation had told us that before long trial and error...
This is a simple example for SMALL ICONIC VIEW USING WXLISTCTRL .Please place this code inside the class declaration.I did it in Frame based Windows Application using CODE BLOCKS.It will be useful to you.
wxImageList *il=new wxImageList(32,32,false,0);
wxImageList *i2=new wxImageList(32,32,false,0);
wxDir dir(wxGetCwd());
wxDir dir1(wxGetCwd());
if ( !dir.IsOpened() )
{
// deal with the error here - wxDir would already log an error message
// explaining the exact reason of the failure
return;
}
if ( !dir1.IsOpened() )
{
// deal with the error here - wxDir would already log an error message
// explaining the exact reason of the failure
return;
}
puts("Enumerating object files in current directory:");
wxString path, filename, dirstring,filename1, dirstring1, img,imgPath,path1,img1,imgPath1;
int i=0;
path=wxT("C:\\testing\\splitterwindow\\set\\devices");
path1=wxT("C:\\testing\\splitterwindow\\set\\actions");
img=wxT("C:\\testing\\splitterwindow\\set\\devices\\");
img1=wxT("C:\\testing\\splitterwindow\\set\\actions\\");
bool cont=dir.Open(path);
bool cont1=dir1.Open(path1);
cont = dir.GetFirst(&filename, wxEmptyString, wxDIR_DEFAULT);
dirstring.Append(filename.c_str());
cont1 = dir1.GetFirst(&filename1, wxEmptyString, wxDIR_DEFAULT);
dirstring1.Append(filename1.c_str());
while ( cont )
{
imgPath.clear();
cont = dir.GetNext(&filename);
dirstring.Append(filename.c_str());
// Consturct the imagepath
imgPath.Append(img.c_str());
imgPath.Append(filename.c_str());
//Now, add the images to the imagelist
il->Add(wxBitmap(wxImage(imgPath.c_str())));
i++;
}
while ( cont1 )
{
imgPath1.clear();
cont1 = dir1.GetNext(&filename1);
dirstring1.Append(filename1.c_str());
// Consturct the imagepath
imgPath1.Append(img1.c_str());
imgPath1.Append(filename1.c_str());
//Now, add the images to the imagelist
i2->Add(wxBitmap(wxImage(imgPath1.c_str())));
i++;
}
//assigning the imagelist to listctrl
ListCtrl1->AssignImageList(il, wxIMAGE_LIST_SMALL);
ListCtrl3->AssignImageList(i2, wxIMAGE_LIST_SMALL);
for(int j=0;j < il->GetImageCount()-1;j++)
{
wxListItem itemCol;
itemCol.SetId(j);
itemCol.SetImage(j);
itemCol.SetAlign(wxLIST_FORMAT_LEFT);
ListCtrl1->InsertItem(itemCol);
}
for(int k=0;k < i2->GetImageCount()-1;k++)
{
wxListItem itemCol1;
itemCol1.SetId(k);
itemCol1.SetImage(k);
itemCol1.SetAlign(wxLIST_FORMAT_LEFT);
ListCtrl3->InsertItem(itemCol1);
}
`
I am using a Dynamic Text in Birt. I want to display a sentence on one line but if it's too width it's displayed on two or more. Is there a way to dynamically decrease the font size when the sentence is too width so it stays on one line?
Thank you for your help.
first choose your cell and then click on the script tab,there choose onRender from the drop-down and put this code
this.getStyle().fontSize this gives you to change the fontsize dynamically while rendering the page...
Cheers..
Here is my solution - building on what #Sundar said.
In my case I have two fields in one cell. It is not perfect, but the only way I have to know when the text is "too big" is to measure the length of the combined strings and then adjust the font size accordingly.
Click on the cell and then the script tab, and enter code like this in the onRender script
// Decide if we need to change font size.
totalLength = 0;
if (row["Field Name 1"]) {
totalLength += row["Field Name 1"].length;
}
if (row["Field Name 2"]) {
totalLength += row["Field Name 2"].length;
}
// Make the font smaller with larger amounts of text.
switch (true) {
case (totalLength > 200):
this.getStyle().fontSize = "6pt";
break;
case (totalLength > 100 && totalLength < 200):
this.getStyle().fontSize = "8pt";
break;
default:
this.getStyle().fontSize = "10pt";
break;
}
I have a flashlite3 application with navigation consisting of icons the user can browse left or right through infinitely.
The basic algorithm i'm using now works (and is adequate for this project) however, part of the solution depends on a duplicate of the array of icons. Depending on the number of items in the array, and/or the size of the element contents, this solution could become less efficient. I'm interested in a solution or algorithm(in any language) that could achieve the same thing while being scalable & efficient.
Heres a portion of relevant code in the setter function for mutating the '_selectedItem' property, which:
Evaluates the current '_selectedItem' and the new '_value'
Based on step 1 pop,unshifts right, or shift,pops left
Repeats step 2 until the icon matching the '_selectedItem' is in the center of the array
This code runs using 3 arrays:
[static] Array of positions. There are 5 icons, 3 are visible at a time, so position 0 is off stage, position 1 is 1/3, position 2 is 1/2 ..
When instantiating the icons 2 arrays are created: _viewArray & _icons. The order of _viewArray mimics the order to be displayed and _icons is left alone and used for the loop condition checking
///Actionscript2///
public function set selectedItem(value:Number)
{
var w=Stage.width;
if(value > _icons.length-1)
{
value=0;
}else if(value < 0)
{
value=_icons.length-1;
}
if(value > _selectedIndex)
{
while(_viewArray[Math.floor(_icons.length*.5)] != _icons[value])
{
var element;
element=_viewArray.pop();
_viewArray.unshift(element);
}
}else if(value < _selectedIndex)
{
while(_viewArray[Math.floor(_icons.length*.5)]!=_icons[value])
{
var element;
element=_viewArray.shift();
_viewArray.push(element);
}
}
for(var i:Number=0;i<_viewArray.length;i++)
{
if(i>=1 && i<= _icons.length-2)
{
_viewArray[i]._visible=true;
}else
{
_viewArray[i]._visible=false;
}
Tweener.addTween(_viewArray[i],{_x:positions[i],_alpha:80,time:.5,transition:'elasticIn'})
}
Tweener.addTween(_icons[(_viewArray.length*.5)-1],{_alpha:100,time:.0,transition:'elasticIn'});
Tweener.addTween(_selectedServiceIndicator,{_alpha:0,time:.3,transition:'elasticIn',onComplete:function() {Tweener.addTween(this,{_alpha:100,time:.2,transition:'elasticIn'});}});
var eventObject:Object = {target:this, type:'SelectedItemChange'};
eventObject.value=value;
for(var key in _serviceData[value])
eventObject[key]=_serviceData[value][key];
dispatchEvent(eventObject);
_selectedIndex=value;
}
Why does each element of the _viewArray has to actually store the icon, rather than only the index into the _icons array? This way you only have the icons stored once, and _viewArray just stores their presentation order.