Tutorial > Viewer Canvas
The ViewerCanvas class will replace all images of molecules. In the past, you would have to create the images by hand, or generate them from a servlet and cache them. No longer! Now you just load chemicals into ViewerCanvas components and change their styles. All canvases are fully customizable, as described in the introductory pages. There is no need to remake images for every small change, as chemical graphics may now be deployed programmatically!
The ViewerCanvas constructor takes only 3 parameters: name, width and height.
new ViewerCanvas(name, width, height);Examples
Adhere to ACS Document 1996 style:
<script>
let viewACS = new ChemDoodle.ViewerCanvas('viewACS', 100, 100);
viewACS.styles.bonds_width_2D = .6;
viewACS.styles.bonds_saturationWidthAbs_2D = 2.6;
viewACS.styles.bonds_hashSpacing_2D = 2.5;
viewACS.styles.atoms_font_size_2D = 10;
viewACS.styles.atoms_font_families_2D = ['Helvetica', 'Arial', 'sans-serif'];
viewACS.styles.atoms_displayTerminalCarbonLabels_2D = true;
let caffeineMolFile = 'Molecule Name\n CHEMDOOD08070920033D 0 0.00000 0.00000 0\n[Insert Comment Here]\n 14 15 0 0 0 0 0 0 0 0 1 V2000\n -0.3318 2.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 1.0000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 0.5000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 1.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 -1.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -1.0000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 2.0640 -0.0000 0.0000 C 0 0 0 2 0 0 0 0 0 0 0 0\n 1.7910 1.7553 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 -0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -2.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1 2 2 0 0 0 0\n 3 2 1 0 0 0 0\n 4 2 1 0 0 0 0\n 3 5 1 0 0 0 0\n 3 6 1 0 0 0 0\n 7 4 1 0 0 0 0\n 4 8 2 0 0 0 0\n 9 5 2 0 0 0 0\n 10 5 1 0 0 0 0\n 10 8 1 0 0 0 0\n 7 11 1 0 0 0 0\n 7 12 1 0 0 0 0\n 13 8 1 0 0 0 0\n 13 11 2 0 0 0 0\n 10 14 1 0 0 0 0\nM END\n> <DATE>\n07-08-2009\n';
let caffeine = ChemDoodle.readMOL(caffeineMolFile);
caffeine.scaleToAverageBondLength(14.4);
viewACS.loadMolecule(caffeine);
</script>Create a canvas with a background image:
<script>
let viewBackground = new ChemDoodle.ViewerCanvas('viewBackground', 100, 100);
viewBackground.setBackgroundImage('/img/cwc/backgrounds/cappuccino.png');
viewBackground.styles.atoms_color = '#FFC769';
viewBackground.styles.bonds_color = '#FFC769';
let caffeineMolFile = 'Molecule Name\n CHEMDOOD08070920033D 0 0.00000 0.00000 0\n[Insert Comment Here]\n 14 15 0 0 0 0 0 0 0 0 1 V2000\n -0.3318 2.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 1.0000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 0.5000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 1.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 -1.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -1.0000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 2.0640 -0.0000 0.0000 C 0 0 0 2 0 0 0 0 0 0 0 0\n 1.7910 1.7553 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 -0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -2.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1 2 2 0 0 0 0\n 3 2 1 0 0 0 0\n 4 2 1 0 0 0 0\n 3 5 1 0 0 0 0\n 3 6 1 0 0 0 0\n 7 4 1 0 0 0 0\n 4 8 2 0 0 0 0\n 9 5 2 0 0 0 0\n 10 5 1 0 0 0 0\n 10 8 1 0 0 0 0\n 7 11 1 0 0 0 0\n 7 12 1 0 0 0 0\n 13 8 1 0 0 0 0\n 13 11 2 0 0 0 0\n 10 14 1 0 0 0 0\nM END\n> <DATE>\n07-08-2009\n';
let caffeine = ChemDoodle.readMOL(caffeineMolFile);
viewBackground.loadMolecule(caffeine);
</script>Create a canvas with a custom style:
<script>
let viewCustom = new ChemDoodle.ViewerCanvas('viewCustom', 100, 100);
viewCustom.styles.backgroundColor = '#C9F9FF';
viewCustom.styles.atoms_font_size_2D = 12;
viewCustom.styles.atoms_font_families_2D[0] = 'Apple Chancery';
viewCustom.styles.atoms_font_families_2D[1] = 'Lucida Calligraphy';
viewCustom.styles.atoms_font_families_2D[2] = 'Mistral';
viewCustom.styles.atoms_font_families_2D[3] = 'URW Chancery L';
viewCustom.styles.atoms_color = 'green';
viewCustom.styles.bonds_color = 'purple';
viewCustom.styles.bonds_width_2D = .8;
viewCustom.styles.bonds_useAbsoluteSaturationWidths_2D = false;
viewCustom.styles.bonds_saturationWidth_2D = .3;
viewCustom.styles.bonds_symmetrical_2D = true;
let caffeineMolFile = 'Molecule Name\n CHEMDOOD08070920033D 0 0.00000 0.00000 0\n[Insert Comment Here]\n 14 15 0 0 0 0 0 0 0 0 1 V2000\n -0.3318 2.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 1.0000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 0.5000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -1.1980 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 1.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 0.5342 -0.5000 0.0000 C 0 0 0 1 0 0 0 0 0 0 0 0\n -2.0640 -1.0000 0.0000 O 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -1.0000 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n 2.0640 -0.0000 0.0000 C 0 0 0 2 0 0 0 0 0 0 0 0\n 1.7910 1.7553 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1.4804 -0.8047 0.0000 N 0 0 0 1 0 0 0 0 0 0 0 0\n -0.3318 -2.0000 0.0000 C 0 0 0 4 0 0 0 0 0 0 0 0\n 1 2 2 0 0 0 0\n 3 2 1 0 0 0 0\n 4 2 1 0 0 0 0\n 3 5 1 0 0 0 0\n 3 6 1 0 0 0 0\n 7 4 1 0 0 0 0\n 4 8 2 0 0 0 0\n 9 5 2 0 0 0 0\n 10 5 1 0 0 0 0\n 10 8 1 0 0 0 0\n 7 11 1 0 0 0 0\n 7 12 1 0 0 0 0\n 13 8 1 0 0 0 0\n 13 11 2 0 0 0 0\n 10 14 1 0 0 0 0\nM END\n> <DATE>\n07-08-2009\n';
let caffeine = ChemDoodle.readMOL(caffeineMolFile);
viewCustom.loadMolecule(caffeine);
</script>
