Experience the power of flexible layout control with our latest Flutter update. We've introduced the ability to adjust the height and width parameters for each block in your two-dimensional scrolling layout. This enhancement gives you complete control over the sizing of individual elements within your Flutter app, providing a seamless and dynamic user experience.
With the newfound versatility of customizable block dimensions, you can tailor your app's layout to perfection. Whether you're designing a complex dashboard, a responsive grid, or a user-friendly interface, our updated Flutter code empowers you to create stunning visuals and ensure an optimal user experience on every device.
Join us as we explore this exciting update, unlocking new possibilities for your Flutter app development. Learn how to harness the potential of height and width parameters to achieve pixel-perfect precision in your UI designs.
Stay ahead in the world of Flutter app development with our cutting-edge features. Watch the video now and elevate your Flutter projects to the next level with the freedom to fine-tune your layout's dimensions.
class TwoDimensionalGridView extends TwoDimensionalScrollView {
const TwoDimensionalGridView({
super.key,
super.primary,
super.mainAxis = Axis.vertical,
super.verticalDetails = const ScrollableDetails.vertical(),
super.horizontalDetails = const ScrollableDetails.horizontal(),
required TwoDimensionalChildBuilderDelegate delegate,
this.width = 200,
this.height = 200,
super.cacheExtent,
super.diagonalDragBehavior = DiagonalDragBehavior.none,
super.dragStartBehavior = DragStartBehavior.start,
super.keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual,
super.clipBehavior = Clip.hardEdge,
}) : super(delegate: delegate);
final double height;
final double width;
@override
Widget buildViewport(
BuildContext context,
ViewportOffset verticalOffset,
ViewportOffset horizontalOffset,
) {
return TwoDimensionalGridViewport(
horizontalOffset: horizontalOffset,
horizontalAxisDirection: horizontalDetails.direction,
verticalOffset: verticalOffset,
width: width,
height: height,
verticalAxisDirection: verticalDetails.direction,
mainAxis: mainAxis,
delegate: delegate as TwoDimensionalChildBuilderDelegate,
cacheExtent: cacheExtent,
clipBehavior: clipBehavior,
);
}
}
class TwoDimensionalGridViewport extends TwoDimensionalViewport {
const TwoDimensionalGridViewport({
super.key,
required super.verticalOffset,
required super.verticalAxisDirection,
required super.horizontalOffset,
required super.horizontalAxisDirection,
required TwoDimensionalChildBuilderDelegate super.delegate,
required super.mainAxis,
super.cacheExtent,
required this.width,
required this.height,
super.clipBehavior = Clip.hardEdge,
});
final double height;
final double width;
@override
RenderTwoDimensionalViewport createRenderObject(BuildContext context) {
return RenderTwoDimensionalGridViewport(
horizontalOffset: horizontalOffset,
horizontalAxisDirection: horizontalAxisDirection,
verticalOffset: verticalOffset,
verticalAxisDirection: verticalAxisDirection,
mainAxis: mainAxis,
height: height,
width: width,
delegate: delegate as TwoDimensionalChildBuilderDelegate,
childManager: context as TwoDimensionalChildManager,
cacheExtent: cacheExtent,
clipBehavior: clipBehavior,
);
}
@override
void updateRenderObject(
BuildContext context,
RenderTwoDimensionalGridViewport renderObject,
) {
renderObject
..horizontalOffset = horizontalOffset
..horizontalAxisDirection = horizontalAxisDirection
..verticalOffset = verticalOffset
..verticalAxisDirection = verticalAxisDirection
..mainAxis = mainAxis
..delegate = delegate
..cacheExtent = cacheExtent
..clipBehavior = clipBehavior;
}
}
class RenderTwoDimensionalGridViewport extends RenderTwoDimensionalViewport {
RenderTwoDimensionalGridViewport({
required super.horizontalOffset,
required super.horizontalAxisDirection,
required super.verticalOffset,
required super.verticalAxisDirection,
required TwoDimensionalChildBuilderDelegate delegate,
required super.mainAxis,
required super.childManager,
super.cacheExtent,
required this.width,
required this.height,
super.clipBehavior = Clip.hardEdge,
}) : super(delegate: delegate);
final double height;
final double width;
@override
void layoutChildSequence() {
final double horizontalPixels = horizontalOffset.pixels;
final double verticalPixels = verticalOffset.pixels;
final double viewportWidth = viewportDimension.width + cacheExtent;
final double viewportHeight = viewportDimension.height + cacheExtent;
final TwoDimensionalChildBuilderDelegate builderDelegate =
delegate as TwoDimensionalChildBuilderDelegate;
final int maxRowIndex = builderDelegate.maxYIndex!;
final int maxColumnIndex = builderDelegate.maxXIndex!;
final int leadingColumn = math.max((horizontalPixels / width).floor(), 0);
final int leadingRow = math.max((verticalPixels / height).floor(), 0);
final int trailingColumn = math.min(
((horizontalPixels + viewportWidth) / width).ceil(),
maxColumnIndex,
);
final int trailingRow = math.min(
((verticalPixels + viewportHeight) / height).ceil(),
maxRowIndex,
);
double xLayoutOffset = (leadingColumn * width) - horizontalOffset.pixels;
for (int column = leadingColumn; column <= trailingColumn; column++) {
double yLayoutOffset = (leadingRow * height) - verticalOffset.pixels;
for (int row = leadingRow; row <= trailingRow; row++) {
final ChildVicinity vicinity =
ChildVicinity(xIndex: column, yIndex: row);
final RenderBox child = buildOrObtainChildFor(vicinity)!;
child.layout(constraints.tighten(width: width, height: height));
// Subclasses only need to set the normalized layout offset. The super
// class adjusts for reversed axes.
parentDataOf(child).layoutOffset = Offset(xLayoutOffset, yLayoutOffset);
yLayoutOffset += height;
}
xLayoutOffset += width;
}
// Set the min and max scroll extents for each axis.
final double verticalExtent = height * (maxRowIndex + 1);
verticalOffset.applyContentDimensions(
0.0,
clampDouble(
verticalExtent - viewportDimension.height, 0.0, double.infinity),
);
final double horizontalExtent = width * (maxColumnIndex + 1);
horizontalOffset.applyContentDimensions(
0.0,
clampDouble(
horizontalExtent - viewportDimension.width, 0.0, double.infinity),
);
// Super class handles garbage collection too!
}
}
Easily transform integers into Excel-style alphabet labels with our provided code snippet. Whether you're working on data analysis, spreadsheet automation, or any project that requires column labeling, this code simplifies the process. Input any integer, and it swiftly generates the corresponding alphabet label, eliminating the need for manual calculations. This efficient and user-friendly solution is a valuable addition to your Python toolkit, enhancing your ability to handle tasks involving Excel-style column headers and references. Streamline your coding projects today with this intuitive integer-to-alphabet conversion code, improving your productivity and precision.
String numberToAlphabet(int number) {
if (number <= 0) {
print('Input must be a positive integer');
}
String result = '';
while (number > 0) {
int remainder = (number - 1) % 26;
result = String.fromCharCode(65 + remainder) + result;
number = ((number - 1) / 26).floor();
}
return result;
}
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