*
* The Initial Developer of the Original Code is
* Robert Kaiser <kairo@kairo.at>.
- * Portions created by the Initial Developer are Copyright (C) 2008-210
+ * Portions created by the Initial Developer are Copyright (C) 2008-2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
if (gCurrentImageData) {
gLastImageData = gCurrentImageData;
+ document.getElementById("backButton").disabled = false;
}
gColorPalette = getColorPalette(document.getElementById("palette").value);
if (zoomend.y < zoomstart.y)
[zoomend.y, zoomstart.y] = [zoomstart.y, zoomend.y];
- // determine new "coordinates"
- var CWidth = gCurrentImageData.C_max.r - gCurrentImageData.C_min.r;
- var CHeight = gCurrentImageData.C_max.i - gCurrentImageData.C_min.i;
- var newC_min = new complex(
- gCurrentImageData.C_min.r + zoomstart.x / gCurrentImageData.iWidth * CWidth,
- gCurrentImageData.C_min.i + zoomstart.y / gCurrentImageData.iHeight * CHeight);
- var newC_max = new complex(
- gCurrentImageData.C_min.r + zoomend.x / gCurrentImageData.iWidth * CWidth,
- gCurrentImageData.C_min.i + zoomend.y / gCurrentImageData.iHeight * CHeight);
+ if (gCurrentImageData) {
+ // determine new "coordinates"
+ var CWidth = gCurrentImageData.C_max.r - gCurrentImageData.C_min.r;
+ var CHeight = gCurrentImageData.C_max.i - gCurrentImageData.C_min.i;
+ var newC_min = new complex(
+ gCurrentImageData.C_min.r + zoomstart.x / gCurrentImageData.iWidth * CWidth,
+ gCurrentImageData.C_min.i + zoomstart.y / gCurrentImageData.iHeight * CHeight);
+ var newC_max = new complex(
+ gCurrentImageData.C_min.r + zoomend.x / gCurrentImageData.iWidth * CWidth,
+ gCurrentImageData.C_min.i + zoomend.y / gCurrentImageData.iHeight * CHeight);
+ }
+ else {
+ var newC_min = new complex(-2, -1.5);
+ var newC_max = new complex(1, 1.5);
+ }
adjustCoordsAndDraw(newC_min, newC_max);
}
coordObj.clientX - canvas.offsetLeft - zoomstart.x,
coordObj.clientY - canvas.offsetTop - zoomstart.y);
}
- break;
+ break;
}
}
};
+function drawIfEmpty() {
+ if (!gCurrentImageData) {
+ drawImage();
+ }
+}
+
function toggleSettings() {
var fs = document.getElementById("settings");
if (fs.style.display != "block") {
// use gLastImageData.iWidth, gLastImageData.iHeight ???
adjustCoordsAndDraw(gLastImageData.C_min, gLastImageData.C_max);
gLastImageData = undefined;
+ document.getElementById("backButton").disabled = true;
}
}