I'm building a simple game in C++Builder6 and I have 42 Image objects on a Form... At start-up I want all Image objects to be disabled, so I wonder can I put all of them in an array and simply loop thorough the entire array and make them Disabled? I know there must be a way, but I'm just new to programming :)
You have several options.
First: You can declare
Image* array[40];
And dynamically construct the image.
for ( int i = 0 ; i < 40; ++i ) {
image[i] = new Image(this); // where "this" is pointer to your form
image[i]->Parent = this;
// option below are optional
image[i]->Height = 50;
image[i]->Width = 50;
image[i]->Left = 40;
image[i]->Top = 100;
image[i]->Tag = i;
image[i]->OnClick = ButtonClick; // connect with method
}
Second option is declare
Image* array[40];
and manually set all values;
array[0] = Image1;
...
array[39] = Image40;
Then you will have all image in array and you can use loop for doing something on all Image
Related
was wondering if someone could show me what I'm doing wrong here.
I have some old AS2 flash code I'm trying to get working.
First I create a few arrays in frame 1 of the main timeline like so-
var typeArr:Array = new Array();
for (var i:Number = 1; i < 5; i++)
{
_root.typeArr[i] = "data goes here";
}
Then I have a movieclip dynamically attached on the main stage that when clicked appends one of the arrays we created by pushing the string 'foo' to it-
stop();
_root.myType=3;//this can be any of our array numbers
this.onPress=function(){
var foo:String="test";
_root.typeArr[_root.myType].push(foo);
trace(_root.typeArr[_root.myType]);
}
Where _root.typeArr[_root.myType] is the array name and number _root.typeArr3, but pushing the data does not work and returns nothing.
However, if I test it directly using-
_root.typeArr[_root.myType]=foo;
It will store the data once (_root.typeArr3=test), so I can't see why it won't push to that array as multiple elements each time like- "test,test,test"
It's driving me crazy.
Thanks! :)
_root.typeArr[_root.myType] is equal to "data goes here" so you are pushing string to a string, which doesn't work.
If you would like to append the new string, you should do something like:
_root.typeArr[_root.myType]+=foo;
and you will get: data goes heretest
If you have different data structure instead of "data goes here" the key may lie in the format of this data.
var typeArr:Array = new Array();
// 'i' must start from 0 because the first element is typeArr[0]
for (var i:Number = 0; i < 5; i++)
{
typeArr[i] = i;
// trace(typeArr[i]); // 0,1,2,3,4
}
// trace(typeArr); // 0,1,2,3,4
myType = 3;
bt.onPress = function()
{
var foo:String = "test";
// push method puts the element at the end of your array
// typeArr.push(foo);
// trace(typeArr); // 0,1,2,3,4,test
// splice method replace the 4e element (index 3) of your array
typeArr.splice(myType, 1, foo);
trace(typeArr); // 0,1,2,test,4
}
here's my code.this prompts a exception saying "IllegalArgumentException: Children: duplicate children added: parent = Grid hgap=5.0, vgap=5.0, alignment=TOP_LEFT"
File file = new File("D:\SERVER\Server Content\Apps\icons");
File[] filelist1 = file.listFiles();
ArrayList<File> filelist2 = new ArrayList<>();
hb = new HBox();
for (File file1 : filelist1) {
filelist2.add(file1);
}
System.out.println(filelist2.size());
for (int i = 0; i < filelist2.size(); i++) {
System.out.println(filelist2.get(i).getName());
image = new Image(filelist2.get(i).toURI().toString());
pic = new ImageView();
pic.setFitWidth(130);
pic.setFitHeight(130);
gridpane.setPadding(new Insets(5));
gridpane.setHgap(5);
gridpane.setVgap(5);
pic.setImage(image);
hb.getChildren().add(pic);
}
Adding Items to a GridPane is a little different.
From the Docs
To use the GridPane, an application needs to set the layout
constraints on the children and add those children to the gridpane
instance. Constraints are set on the children using static setter
methods on the GridPane class
Applications may also use convenience methods which combine the steps
of setting the constraints and adding the children
So in your example, you first need to decide : How many images do I need in one row ?
Lets say your answer is 4, then your code becomes : (There are diff approaches to it, I am writing down the simplest one. You can use anything, loops for rows and colums being a good alternative ;)
)
//Can be set once, no need to keep them inside loop
gridpane.setPadding(new Insets(5));
gridpane.setHgap(5);
gridpane.setVgap(5);
//Declaring variables for Row Count and Column Count
int imageCol = 0;
int imageRow = 0;
for (int i = 0; i < filelist2.size(); i++) {
System.out.println(filelist2.get(i).getName());
image = new Image(filelist2.get(i).toURI().toString());
pic = new ImageView();
pic.setFitWidth(130);
pic.setFitHeight(130);
pic.setImage(image);
hb.add(pic, imageCol, imageRow );
imageCol++;
// To check if all the 4 images of a row are completed
if(imageCol > 3){
// Reset Column
imageCol=0;
// Next Row
imageRow++;
}
}
In the first frame of the movie, I declared an array variable and create movieclips:
frame = new Array();
for(i=1; i<=5; i++){
frame[i] = "empty";
var a = attachMovie("box", "box"+i, i, {_x:i*100, _y:100});
}
I want to use the variable frame[] to count how many times the movieclips are clicked.
I came to make a class for the movieclip "box" which I use, but couldn't figure out how to find out which button is clicked.
Not even need to create a class for box, just pass index i as parameter to each movieclip in method attachMovie:
frame = new Array();
for(i=1; i<=5; i++){
frame[i] = "empty";
var a = attachMovie("box", "box"+i, i, {_x:i*100, _y:100, index:i});
a.onMouseDown = function ()
{
trace(this["index"])
}
}
After that each box knows its own index in frame array.
I'm pretty sure eval doesn't work this way, but it gets the idea across. I'm trying to dynamically create global variables; here's my code:
var ti_arr:Array = new Array;
_global.a = new Object;
for (var t=0; t<group_count-1; t++) {
numOfItems = group_nodes[t].childNodes.length;
ti_arr = "tab_info" add t;
// <-- I want to define a global array with the name held in ti_arr here
for (var i=0; i<numOfItems; i++) {
eval(ti_arr)[i].a.name = tempNode.attributes.name; //<-- or give the array global scope here
eval(ti_arr)[i].a.value = tempNode.attributes.value;
}
}
I need: tab_info1.a.name to have global scope.
I've been out of the actionscript loop for a while:
eval is bad.. brackets are good.
http://www.kirupa.com/forum/showthread.php?t=259717
It's explained simply here, not sure why so much searching on eval() didn't net me this sooner.
for (var i=0;i<3;i++) {
ti_arr = "new_array";
_global[ti_arr] = new Array
_global[ti_arr][i] = new Object
_global[ti_arr][i].name = tempnode.name
}
I am running into some trouble adding an array into another array to create a multi-dimensional array.
The code appears as below:
var slideDataArray:Array = new Array();
var slideShowDataArray:Array = new Array();
slideDataArray[0] = xmlData.SlideShowParameters.SlideShowImagesDirectory;
slideDataArray[1] = xmlData.SlideShowParameters.SlideShowTimeInterval.valueOf();
slideDataArray[2] = xmlData.SlideShowParameters.SlideShowWidth.valueOf();
slideDataArray[3] = xmlData.SlideShowParameters.SlideShowHeight.valueOf();
slideDataArray[4] = slides.length();
slideShowDataArray[0] = slideDataArray;
for (i = 0; i < slides.length(); i++) {
// Read data from Slides tag in the XML file into slideDataArray
slideDataArray[0] = slides[i].SlideImage.toString();
slideDataArray[1] = slides[i].SlideText.toString();
slideDataArray[2] = slides[i].SlideLink.toString();
// Input the data from slideDataArray into the array for the slideshow (slideShowDataArray)
slideShowDataArray[i + 1] = slideDataArray;
}
// end of FOR loop
I am looking for a means of placing the slideDataArray into a 'slot' or value of slideShowDataArray so that I can in the end pass the slideShowDataArray as a parameter to another function.
As of now, the last slideDataArray appears 11 times (the loop runs 11 times) in slideShowDataArray and the way the code is written the slideDataArray is unique every iteration of the loop.
Any help is appreciated.
Thanks in advance...
Remember you are not adding an array, but a reference to slideDataArray to your multidimensional array. Each reference points to the same array - which just contains different values on every iteration of the loop. In other words: Every time you add that reference, you "link" to the same address in memory.
To get around this, move the inner part of the loop to a separate function and create a new local array on every call:
function createDataArray ( slide:Object ) : Array {
var slideDataArray:Array = [];
slideDataArray[0] = slide.SlideImage.toString();
slideDataArray[1] = slide.SlideText.toString();
slideDataArray[2] = slide.SlideLink.toString();
return slideDataArray;
}
Then call it from your loop:
for (i = 0; i < slides.length(); i++) {
slideShowDataArray.push( createDataArray (slides[i]) );
}
You should end up with 11 unique arrays instead of one array that is overwritten 11 times.