Cascades Development

[shahumang8]

Hello,

    When i draw text into Image at that time Application Crash so please check attachement and update me.

    Note :- But when i draw Rectangle at that time ractangle draw perfect and run.

Thanks.

[simon_hain]

I did not check your code, but maybe you could use a Container with an image background and a Label as content?

[shahumang8]

Hello Simon,

   No.Actully i do image Processing.

   Please check my code.

   main.qml

// Default empty project template
import bb.cascades 1.0

// creates one page with a label

Page {
    Container {
        layout: DockLayout {
        }
        ImageView {
            objectName: "imageView"
        }
    }
}

   TextDraw.cpp

// Default empty project template
#include "TextDraw.hpp"

#include <bb/cascades/Application>
#include <bb/cascades/QmlDocument>
#include <bb/cascades/AbstractPane>
#include <bb/cascades/Page>
#include <bb/cascades/ImageView>
#include <bb/ImageData>
#include <bb/PixelFormat>

using namespace bb;
using namespace bb::cascades;

TextDraw::TextDraw(bb::cascades::Application *app) :
		QObject(app) {
	// create scene document from main.qml asset
	// set parent to created document to ensure it exists for the whole application lifetime
	QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);

	// create root object for the UI
	Page *root = qml->createRootObject<Page>();
	ImageView* testImage = root->findChild<ImageView *>("imageView");

	QImage *qImageMain = new QImage("app/native/assets/test.jpg");

	QPainter painter(qImageMain);

	// Draw Rect
	painter.fillRect(QRect(0, 0, 50, 50), QColor::fromRgb(255, 0, 0));

	//Draw Text
	painter.drawText(150, 150, "Hello");

	int width = qImageMain->width();
	int height = qImageMain->height();

	ImageData imageData = ImageData(PixelFormat::RGBA_Premultiplied, width,
			height);

	int A, R, G, B;
	unsigned char *dstLine = imageData.pixels();
	for (int y = 0; y < height; y++) {
		unsigned char * dst = dstLine;
		for (int x = 0; x < width; x++) {
			QRgb srcPixel = qImageMain->pixel(x, y);

			A = qAlpha(srcPixel);
			R = qRed(srcPixel);
			G = qGreen(srcPixel);
			B = qBlue(srcPixel);

			*dst++ = R;
			*dst++ = G;
			*dst++ = B;
			*dst++ = A;
		}
		dstLine += imageData.bytesPerLine();
	}

	Image image = Image(imageData);

	testImage->setImage(image);

	// set created root object as a scene
	app->setScene(root);
}

   And update me. 

 Thanks.

[smiley]

This is a known problem as I have posted before and another user before me.

//Draw Text
	painter.drawText(150, 150, "Hello");

No one from RIM had confirmed the problem yet but drawText() crashes everytime. 

the error I got is something about font.  if you search the forum you will find the posting.